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Wadhah Garhuom - Improving the robustness of the finite cell method for problems with large deformations

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Wadhah Garhuom

Improving the robustness of the finite cell method for problems with large deformations

Series: Mechanik/Bruchmechanik

Volume 359 2024

Results in this title

Remeshing strategy for large deformations in the FCM S. 89-129

„… large deformations. To this end, a new mesh is generated if896 Remeshing strategy for large deformations …” „… in the FCMthe deformations become too large, and then field variables such as stresses and …” „… chapter, we introduce a global remeshing strategy for large deformation analysisto increase the robustness …”

Publications resulting from this project S. 134

„… .202000004[2] W. Garhuom, S. Hubrich, L. Radtke, and A. Düster. A remeshing strategy for large de-formations …” „… quadrature for cut finite elementsand cells undergoing large deformations. Computational Mechanics 70, pp …” „… for the Finite Cell Method at Large Deformations. Non-standard DiscretisationMethods in Solid …”

Titelei/Inhaltsverzeichnis

„… finite cell method for problems with large deformationsReihe 18Mechanik/BruchmechanikBlackL_240107_F51 …” „… , M.Sc.Improving the robustness of the finite cell method for problems with large deformationsFortschritt-Berichte …” „… , Remeshing, Large deformationZahlreiche Ingenieuranwendungen mit komplexen Strukturen und mikrostrukturierten …”

Summary and outlook S. 130-133

„… problems undergoing large deformations. The suggested tech-nique is based on a multiplicative decomposition …” „… weights are larger or equal tozero. To ensure a high level of precision for the weights, a set of …” „… with a cylindricalhole and then tested a more complex geometry of foam including large …”

Introduction S. 1-5

„… significantdeformations is still ongoing research. When performing a large deformation analysis with finite strains, the …” „… introduced to improve the robustnessof the FCM for large deformation analysis. The chapter starts by …” „… perfor-mance of the remeshing approach for large deformation analyses of hyperelasticityand elastoplasticity …”

Basic equations of continuum mechanics S. 6-16

„… . The Green-Lagrange strain tensor E iswell suited to model finite strain deformations including large …” „… infinitesimal deformations where the rotations and displace-ments are not too large.102.3 Constitutive equations …” „… geometrical nonlinearities undergoing large deforma-tion analysis. The Newton-Raphson approach is frequently …”

Non-negative moment fitting quadrature for cut finite elements and cells S. 27-58

„… are investigatedfor nonlinear applications undergoing large deformation analysis in hyperelasticity …” „… elastoplastic simulations, the initial yield stress is multiplied by a large factor toavoid plastic deformations …” „… techniques taking into consideration large deformations with material and ge-ometrical nonlinearities. For …”

Bibliography S. 135-152

„… fi-nite elements and cells undergoing large deformations. Computational Mechanics,70(5):1059–1081 …” „… problems with large deformations. Proceedings inApplied Mathematics and Mechanics, 21(1):e202100047 …” „… for the finite cell method at large deformations. In J. Schröderand P. Wriggers, editors …”

Eigenvalue stabilization technique to increase the robustness of the FCM S. 59-88

„… significantly enhancethe robustness of the FCM for applications including nonlinear large deformation analysis …” „… applications under-going large deformations. The method was first introduced by Loehnert [114, 115 …” „… of 0.2 mm leading to a total of 85 loadincrements to achieve the final deformation.Figure 5.21 …”

The finite cell method S. 17-26

„… discretizationThe deformation gradient can be obtained based on the gradient of the mappingsF c = jc J−1,c =∂xc∂Xc …” „… stiffnessmatrixkc,p = β∫ΓDNTN dA, (3.35)233 The finite cell methodwhich does not depend on the deformation. Finally …” „… where the boundary ΓD does not conformto the mesh during deformation utilizing the remeshing strategy …”

doi.org/10.51202/9783186359186

VDI Wissensforum GmbH - International Conference on Gears 2019

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VDI Wissensforum GmbH (ed.)

International Conference on Gears 2019

Series: VDI-Berichte

Volume 2355 2019

Results in this title

M. Raabe Consideration of elastic deformations of gear bodies using a reduction on a fourier series S. 797-808

„… Consideration of elastic deformations of gear bodies using a reduction on a Fourier series …” „… Dipl.-Ing. Markus Raabe, MESYS AG, Zürich, Switzerland Abstract Elastic deformations of a gear body …” „… lead to deformations of the flank line of a gear and have therefore an impact on the load distribution …”

A. Weis, T. Deliktas, M. Liewald, N. Missal Cold forging of gear components by a modified Samanta process S. 1765-1776

„… distribution of the total deformation work along a larger punch stroke results into a reduction of by 35 …” „… VDI-Berichte Nr. 2355, 2019 1765 of gearings the deformation takes places merely around the teeth [4 …” „… forming process, large friction surfaces and increased punch forces are expected. The second approach …”

I. Moriwaki, S. Doi, Asso. D. Iba, T. Yomenura, K. Haizumi Conjugate tooth profile of circular spline to involute flex gear in strain wave gearing S. 973-984

„… meshing in the strain-wave gearing is based on a large deformation of the flex gear caused by the …” „… calculated. Discussions showed that involute gears with a smaller addendum and dedendum and larger pressure …” „… flex gear have no elastic deformation but change their direction during an elliptic cam rotates inside …”

R. Saito, K. Matsuo, Y. Suzuki Noise characteristics induced by micropitting formed on particle-based parkerized gears S. 69-78

„… driving, causing the tooth flank profile to deform. Such deformation over time gives rise to noise that …” „… tooth flank profile deformation occurring during the progression of gear meshing. With this treatment …” „… noise caused by deformation of the tooth flank profile due to micropitting. In addition, the level of …”

R. Ratnagiri, M. Kato, H. Kuchelka Advances in polyacetal materials for gears S. 1357-1366

„… complicated due to their viscoelastic nature and the ability to sustain large deformation prior to rupture …” „… outline the deformation micromechanisms in polyacetals that are relevant to damage accumulation under …” „… resistance from new formulations and test equipment to measure creep deformation and rupture are introduced …”

D. Mevissen, C. Lopenhaus, T. Bergs Calculation of mixed friction conditions in large-scale rolling-sliding contacts for different surface structures S. 555-568

„… Calculation of Mixed Friction Conditions in Large-Scale Rolling-Sliding Contacts for Different …” „… Combined Solutions ensure the application of the elastic half-space theory for large …” „… the local deformation of the surface. Therefore, this report presents a new solving algorithm for the …”

Y. Cai, L. Yao, J. Ding, S. Ouyang, J. Zhang Analysis of dynamic transmission error for nutation drive with double circular arc gears under assembly errors and different loads S. 343-354

„… advantages of large transmission ratio, high carrying capacity and compact structure. The transmission form …” „… contact deformation, friction between teeth, assembly errors and loads, which can accurately solve the …” „… period of time 0-0.2 s, which is the result of incremental gear tooth deformations caused by load …”

H. Linke, R. Hess Tooth root bending capacity – An analysis of stress and strength S. 949-958

„… The increase of the line of action due to the tooth deformation under load and The stress …” „… be extrapolated to R-ratios less than -1 or larger than 0 up to a certain range. Another approach is …” „… consider the increase of the line of action due to the elastic deformation of the teeth during engagement …”

L. Hui, X. Changl, Y. Shouw, L. Cheng, Z. Chen, L. Yu Research on Dynamic Drum Shape Modification of Helical Gear Pair S. 1011-1026

„… line with the largest deformation, as shown in eq. (17): 4= nH F H l (17) The formula for …” „… teeth, bearings, drive shafts and casings. Under the action of dynamic loads, bending deformation and …” „… torsional deformation will occur. These phenomena will cause the helical gear helix to deviate from the …”

E. Maier, T. Lohner, K. Stahl, P. Sperka, M. Hartl Detailed analyses of film thickness and friction in thermoplastic EHL contacts S. 1391-1400

„… , thermoplastic surfaces experience significant elastic deformation, leading to a large local conformity in …” „… could be present even at fluid film lubrication. The elastic deformation of the thermoplastic surface …” „… lubrication, low material stiffness results in large contact radii such that external load can spread over a …”

J. Tavčar, J. Kos, D. Zorko, J. Duhovnik A multi-criteria polymer gears design optimisation procedure S. 1473-1484

„… picture of all interactions between the design parameters, and so a larger number of iterations is …” „… normal module (mn). A user can have an overview over a larger number of possible solutions, as well as …” „… material pair needs to be selected carefully [7], [8]. The larger size of a polymer gear improves heat …”

A. D. Rauch, C. Wirth An easy-to-use and fast computational model for the prediction of the influence of manufacturing errors on gear transmission error S. 645-656

„… transmission ratio along the line of action, is a result of tooth deformation, mesh misalignment, and …” „… deformations are negligible compared to the magnitude of manufacturing errors which may then cause severe NVH …” „… it originates from (i) deformation of the meshing teeth; (ii) mesh misalignment; and (iii …”

B. Schlecht, T. Schulze Improved tooth contact analysis by using virtual gear twins – How helpful is AI for finding best gear design? S. 203-216

„… the existing calculation model, parametric studies can easily be carried out to cover large data …” „… , Fig.7. Gearing deviation Axis inclination deviation Housing deformation Bearing clearance …” „… depending deformations should be influenced by design arrangements in this way that they are reduced or …”

F. Andary, G. Jacobs, J. Berroth Application of pre-calculated gear mesh stiffness on elastic gear bodies in multi-body simulation S. 1087-1098

„… hand, and requires accounting for the elastic deformation of the load-bearing components on the other …” „… of the system. The reduced models are characterized by large numbers of nodes with multiple degrees …” „… of freedom for each node. As a result of their large number of total degrees of freedom, analyzing …”

H. Baour, P. Falbriard Micro skiving – (r)evolution of a known production process S. 1619-1634

„… Small batches Cost H – high for small series HH – very high for very large series Constraints Parts …” „… possible Distortion None Batch size Middle and large Cost LL – low for middle batches L – low for very …” „… large batches Machining time Slow < 10 min Precision Good ±0.01 Burr Yes Distortion Possible if …”

J. Zhang, J. Wang Dynamic modeling and analysis of a star-wheel reducer S. 741-752

„… been regarded as a promising alternative solution for industrial power transmission where large …” „… reducer with small tooth number difference claims some unique properties such as large transmission ratio …” „… among elastic deformations Fig. 6 demonstrates the elastic deformation of the ith phase star-wheel, in …”

P. L. Yin, J. H. Wang, C. X. Lu Digital twin of gear measuring center (dtgmc) S. 1521-1532

„… motion error, geometric error, probe detection error, deformation error and workpiece installation error …” „… of which, the deformation error is converted into geometric error through finite element modeling …” „… measurement software was used to conduct a large number of measurement simulation on the digital workpiece …”

F. Eigner, R. Michel, M. Berger Analysis on the efficiency of HypoGear S. 127-136

„… the central motor shaft, compare Figure 1 b), results in numerous advantages. In particular, large …” „… gearing, which basically guarantees a high overall coverage and thus a large number of flanks are meshed …” „… will generate a large power loss at high axial forces. Furthermore, power loss due to the lubricant …”

X. Du, B. Chen, X. Shan Robust force control of series elastic actuator using disturbance observer S. 1111-1122

„… safety. The proposed SEA incorporates brushless DC electric motor and large gear reductions that …” „… introduce challenging problems associated with large reflected inertia, friction, backlash and torque ripple …” „… motors and to amplify motor torque, a large speed reduction is widely used. In [1]-[3], the authors …”

C. Brecher, C. Lopenhaus, F. Goergen Transfer of the tooth flank stress into an analogy test concept to provoke the damage pattern tooth flank fracture (TFF) S. 25-36

„… pulsator. Since TFF occur in particular at large modulus gears, which cannot be economically investigated …” „… order to generate an equivalent stress state between analogy and running test for large-modulus spur and …” „… . Since TFF occur in particular at large gears, which cannot be economically investigated using the …”

K. Landet, J. Perret-Liaudet, E. Rigaud, J. Y. Guerder, M. Fraces Experimental study of railway gearbox whining noise S. 79-90

„… to minimize static transmission error fluctuation amplitude for a large range of operating torques …” „… amplitude for a large range of operating torques (100 to 6900 Nm). The gear pair is manufactured with a …” „… conditions We performed a lot of measurements in stationary conditions for large ranges of input speed and …”

Z. H. Wu, Y. Q. Xu, K. A. Liu The Analysis on Grease Lubrication at Two Tapered Bodies Contact Considering Surface Roughness S. 1223-1236

„… small end of the tapered body should be larger than that at large end. The effect of minor skewing on …” „… –y12)]}; VDI-Berichte Nr. 2355, 20191226 y1 and y2 are positions of small and large end …” „… elastic deformation [24]. For grease mixed or boundary lubrication condition, a small value ζ=1×10–3μm is …”

M. Schrank, C. Kiesewetter-Marko, C. Lopenhaus, A. Epple, T. Bergs, C. Brecher Approach for modeling elasticity in the gear honing process S. 1697-1706

„… force is the deformation of the system consisting of tool and workpiece as well as displacements in the …” „… machine [4]. Displacement and deformation of the grinding tool have an influence on the penetration and …” „… . 4. Objective and Approach In gear honing, the deformation of the honing tool in contact has so far …”

S.-J. Tsai, VDI, L. C. Chang, C.-H. Huang A study on tooth profile modification of cycloid planetary gear drive with tooth number difference of two S. 997-1010

„… coefficient method, the set of equations for deformation-displacement and load equilibrium can be summarized …” „… backlash of CS-3 is slightly larger than CS-2, about 2 arcsec. Besides, the fluctuation of backlash …” „… larger than the other two cases, because of different modification methods. However, the maximum value …”

H. Blettery, D. Talbot, A. Kahraman, H. Xu A methodology for measurement of loaded transmission error of hypoid gear pair with misalignments S. 619-634

„… for larger pinion sizes and gear mesh contact ratios as well as higher reduction ratios and higher …” „… . Simon [2] showed theoretically that large variations of the pinion and ring gear axial positions and …” „… deformation of the machine elements under load. Finally, Yoon et al. [11] presented the results of a …”

W. Wagner, S. Schumann, B. Schlecht Co-simulation of the tooth contact of bevel gears within a multibody simulation S. 217-228

„… , large tooth forces occur. Since the stiffness of the teeth is not constant over rotation, these forces …” „… deformations of the tooth flank caused by point loads are Interpolation - lin. influence numbers …” „… compliances (the influence numbers) prior to the simulation. These compliances describe the deformation of …”

M. Heider, B. Pinnekamp, A. Beinstingel Planetary gears: modes, noise and modifications application and validation of simulation and experiment S. 57-68

„… influences and potential remedies were discussed. For example, in [5] the importance of a large overlap …” „… ratio, achieved by a large helix angle is described as the most important factor for reducing gear …” „… variant, lower amplitudes of the tooth meshing frequency can be seen over large areas. High amplitudes …”

P. Scholzen, C. Lopenhaus, C. Brecher, D. Billenstein, F. Rieg, G. Hammerl Investigation of the influence of elastic gear body structures on the operational behavior of gears S. 785-796

„… load-induced deformations of the elastic environment in the tooth contact a simulation of contact conditions …” „… Abaqus [9] the shape factor, small face corner angle, large face corner angle and the aspect ratio are …” „… value: Shape factor: 0.0001 Small face corner angle: 5° Large face corner angle: 170 …”

J.-A. Meis, F. Teklote, M. Borowski Simulation of the tooth root strength under consideration of material quality, finishing process and size effects S. 161-172

„… considered to make sure that no force can be transferred by the other teeth due to elastic deformation …” „… from the simulations are probably appropriate estimates, as the simulations use large sample sizes …” „… both small and large relative widths lead to small fatigue strengths, see Fig. 8. This influence is …”

A. Kubo, M. Nagae, K. Kawasaki Japanese standardization for gear steel qualification via evaluation of HV-scattering S. 893-902

„… pressing has given during the rolling deformation procedure to make steel bar from the continuously casted …” „… and bored, and that material is expanded by plastic deformation to be a ring form. The inner …” „… Texture and HV scattering of carbon steel S40C of 40% ferrite after induction hardening (The larger …”

Titelei/Inhaltsverzeichnis

„… helical gear pairs considering deviations, misalignments and deformations …” „… , Hunan University, Changsha, P. R. China Calculation of mixed friction conditions in large …” „… . Kalinin, Prof. J. Y. Temis, CIAM, Moscow, Russia f Elastic gear deformation Investigation of the …”

B. van Wissen, M. Kanters, F. Mitsuzuka, K. Iwanaga, Ir. A. Hasanovic Predicting wear for high performance plastic gears S. 1323-1334

„… deformation or creep to the dimensional changes can be neglected. The large scatter band is caused by …” „… long-standing track record in a large variety of high performance, high temperature automotive applications …” „… results show slightly lower maximum contact pressures and larger sliding distances than the analytical …”

L. Ryali, D. Talbot A gear load distribution model for planetary gear set with a flexible carrier S. 809-822

„… quasi-static behavior of a planetary gear set is investigated in this study. Carrier deformations result in …” „… ring gear formulation into the original model. But planet carrier and pin deformations which could …” „… among planets. Common practice in industry to account for carrier deformations is to use a simplified …”

M. Solf, C. Lopenhaus, T. Bergs Influence of elastic effects on the grinding force in plunging bevel gear grinding S. 1687-1696

„… deformation of the system. In the work presented, the system elasticity in plunging bevel gear grinding is …” „… . This remaining stock ∆sR is left on the tooth flank due to the elastic deformation of the system. In …” „… this reason, even a small deformation of the grinding wheel and workpiece leads to a significant …”

C. Chevrel-Fraux, R. Fargere, J. Bruyere, P. Velex Modelling of high power geared transmissions, introduction of a filling material S. 903-914

„… have very large dimension. In order to gain mass, some holes and cavities can be introduced in the …” „… body of the larger gear (the wheel). But in certain cases, reduce noise and vibrations is also a …” „… models are accurate on gear wheel structure geometry but need a large number of degrees of freedom to be …”

M. Uhlig, C. Pastor Simulation tool-chain for plastic gear design S. 1453-1460

„… simulations with half-space or stiffness reduction approaches consider elastic deformations and real …” „… reasons over large temperature and humidity ranges during service life is challenging and requires …” „… deformation of surfaces can be modelled by half-space theory with considerable advantages in terms of …”

G.-T. Weber New possibilities for dry hard finishing of internal gears S. 1659-1664

„… deformation in heat treatment. The quality of the green machining processes will remain with little …” „… in the peripheral layer the amount of deformation is higher than in nitriding. To achieve a good …” „… standard inductive sensors, probes or laser measuring devices. The larger amount of stock material on the …”

S. Matkovič, A. Pogačnik, M. Kalin Comparison between VDI 2736 wear calculation and experimentally obtained results S. 1311-1322

„… , resulting in higher operating temperatures. As a result, permanent deformation or in severe cases also …” „… bearing block, which rotates around the pivot by relatively large angles [4]. This way the measurement is …” „… measures the tooth deformation due to load, thus the measurement is not very accurate especially in the …”

H. Aurrekoetxea, I. Ruiz de Ocenda Experimental and theoretical study of load mesh factor for different boundary conditions in wind gearbox planetary stages S. 835-844

„… at the bottom of the tooth where the deformations are not maximum but they are large enough to take …” „… samples. On the other hand, the number of samples must be large enough to cover enough mesh events. 8 to …”

S. J. Ma, G. Y. Wu, G. Liu Study on the contact characteristics of threaded surfaces in a planetary roller screw mechanism S. 1155-1164

„… deformation of the contact surfaces is . Then [18], 2 1 3 2 2 9= ( ) 16 n e F F e E R …” „… at the roller-nut interface is larger than that of the screw-roller interface. The von Mises stress …” „… contact area at the roller-nut interface is larger than that of the screw-roller interface. The contact …”

B. Hu, M. Zheng, C. Zhou Tribo-dynamics model of a spur gear pair with gyroscopic effect and flexible shaft S. 541-554

„… large. To reduce the inertia of high-speed gear drives, the gear shafts are designed as hollow shafts …” „… and OLOA directions, as shown in Fig. 3. The dynamic contact deformation δm (LOA direction) is …” „… The central film thickness predicted by the tribo-dynamic and quasi-static models becomes large …”

F. Rudolph, S. Schumann, B. Schlecht Consideration of solid particles in a gear lapping simulation S. 1675-1686

„… relatively large particles have on the distribution of flank pressure and therefore local lapping wear. This …” „… equilibrium is calculated, using the tooth flank deformations along the contact line and a matrix of …” „… distributions, so every point within the potential contact area will eventually meet a large particle, causing …”

B. Karpuschewski, T. Lierse, S. Schulze Inline-deep rolling – a new approach to increase tooth root load capacity S. 1787-1798

„… [10], [11]. The reason is a microplastic deformation of the subsurface zone by the blasting material …” „… introduction of considerably larger and at the same time deeper-reaching residual compressive stresses a …” „… variant was developed in which the tool processes a larger area of the tooth flank. Fig. 2 compares the …”

J. Cathelin Material data for advanced plastic gear simulation S. 1335-1344

„… as PTFE). However, due to the large choice of material available, and the lack of material data for …” „… maximum deformation of the teeth, the teeth flank safety and flank wear. The SABIC cylindrical gear …” „… exceeded at the gear tooth root because permanent deformation of the teeth can occur, creating local …”

X. Tian, Y. Wu, J. Han, L. Xia Online estimate and compensation of the gear machining error based on electronic gearbox cross-coupling controller S. 1835-0

„… gear hobbing machine tool When a gear is manufactured and the width of the workpiece is large enough …” „… , including the tool manufacturing error, cutting edgewear and tool thermal deformation, limited number of …” „… , Wills-Moren WJ, et al. A unique machine for grinding large, offaxis optical components: the OAGM 2500 …”

T. Pinel, J. Bruyere, P.Velex, L. Billet Parametric Study of a 3D trochoidal reducer model with involute profile S. 437-448

„… ] that off-line-of-action contacts that occur with the elastic deformation of the involute teeth …” „… dynamique d'engrenages à dentures larges," ph.D Thesis (LAMCOS-INSA Lyon), Lyon, 2000. [15] S.-H. Park …”

F. Concli, C. Gorla Dynamic models for planetary gearboxes SHM S. 471-480

„… deformation of the system. The outcomes of the study were promising even if for certain ring gear thicknesses …” „… Fig. 4, it is instead shown, how a large pit in the central region of the flank affects the contact …”

R. Beilicke, L. Bobach, D. Bartel Transient 3D TEHL simulation of spiral bevel gears under mixed friction conditions S. 529-540

„… flow model with limiting shear stress is used. The elastic deformation behavior is modelled by the …” „… also shown in Fig. 9. At 40 °C, the tooth flank contact is characterized by a larger maximum …”

C. M. Illenberger, T. Tobie, K. Stahl Flank load carrying capacity of oil-lubricated high performance plastic gears – Analysis of the pitting development in back-to-back tests S. 1379-1390

„… maximum flank pressure is present in the area of single tooth contact. However, the large deformations of …”

doi.org/10.51202/9783181023556

Aron Sommer - Backprojection Autofocus of Large Ships with Arbitrary Motion for Synthetic Aperture Radar

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Aron Sommer

Backprojection Autofocus of Large Ships with Arbitrary Motion for Synthetic Aperture Radar

Series: Informatik/ Kommunikation

Volume 867 2020

Results in this title

Autofocus of Large Ships with Arbitrary Motion S. 75-111

„… able to reconstruct a focused SAR image of a large ship with arbitrary motion including deformations …” „… , named a hogging deformation. These motions are typical for large tankers in the case of a rough sea [WD …” „… application, a large SAR image of the open sea is used for ship detection and classification. However, large …”

Conclusions S. 112-116

„… larger are the accumulated range errors and the lower is the image quality. We summarized the results of …” „… factorization parameters, large SAR images with arbitrary resolution and arbitrary quality can be reconstructed …” „… , which reconstructs high-quality SAR images of large arbitrarily moving and maneuvering ships robustly …”

Titelei/Inhaltsverzeichnis

„… and the deformation of a large arbitrarily moving ship in order to reconstruct a sharp image of the …” „… / Kommunikation Reihe 10 Backprojection Autofocus of Large Ships with Arbitrary Motion for Synthetic …” „… Autofocus of Large Ships with Arbitrary Motion for Synthetic Aperture Radar Dipl.-Math. techn. Aron …”

Introduction S. 1-12

„… seen, whereas in SAR images a shift in azimuth direction and a deformation of large objects like ships …” „… ) algorithm [UHS03] in order to reconstruct large SAR images with low computational costs. Before going into …” „… maximal deviation to the nominal track is larger than 5 m, lead to poor image quality [SNO15]. Hence …”

doi.org/10.51202/9783186867100

VDI Wissensforum GmbH - Ventiltrieb und Zylinderkopf 2019

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VDI Wissensforum GmbH (ed.)

Ventiltrieb und Zylinderkopf 2019

Series: VDI-Berichte

Volume 2353 2019

Results in this title

C. O. Huber, A. Zurk Cylinder Head Solutions for 300bar and beyond – Next generation commercial and large engines’ advanced design and simulation S. 171-190

„… Cylinder Head Solutions for 300bar and beyond Next generation commercial and large engines …” „… for NOx emission. Very similar arguments can be made for commercial or large diesel engines. The …” „… capability of 300bar and beyond - independent from engine fuel or size (large or commercial). The increased …”

doi.org/10.51202/9783181023532

Jorrid Lund - Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

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Jorrid Lund

Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

Series: Mechanik/Bruchmechanik

Volume 360 2024

Results in this title

Summary and outlook S. 118-123

„… , which allows a direct analysisof the stress and deformation inside the structure in every time step. The …” „… panels. Managing these mesh deformations is a challenge that isinherent to the FSI approach since the …” „… deformations of the structure are bound to lead118to deformed meshes. In an uncoupled approach, the panels of …”

Introduction S. 1-4

„… flexible structure due to a fluid flow leads to a large deformation,the deformation can have a significant …” „… since the large displacements and deformations ofthe floating structure have a significant impact on the …” „… the symmetry of theCauchy stress tensor σ [31, p. 104].If the deformation of a body is large, it is …”

Submersible mixer S. 71-80

„… . Geometrical nonlinearities (such as large rotations) arecaptured. The material parameters for the simulation …” „… materialformulation for all three materials. Geometrical nonlinearities (such as large rotations) arecaptured. The …” „… . These singular panelsare caused by the strong deformation of the blade, which leads to small distorted …”

Floating windturbine S. 49-61

„… static condensation islimited to linear problems and the deformation of the rotor is too large to be …” „… problems and the deformation of the rotor is too large to be modeled53L_240334_BRO_FB_18-360_mP.indd 65 …” „… presented application-related results.5.2 Conceptual designFor large water depths of more than 50 m, a …”

Titelei/Inhaltsverzeichnis

„… flexible structure due to a fluid flow leads to a large deformation,the deformation can have a significant …” „… since the large displacements and deformations ofthe floating structure have a significant impact on the …” „… thrust, torque, and efficiency is investigated in detail. Also, the deformation of theflexible blades is …”

Structural mechanics S. 5-20

„… [31, p. 104].If the deformation of a body is large, it is important to distinguish between the …” „… , the divergenceoperator div() in Eq. (2.1) is written in small letters.The deformation gradient tensor …” „… the deformation gradient and P is the firstPiola-Kirchhoff stress tensor. The abbreviation J = det(F …”

Wave energy converter S. 62-70

„… ) because not only would the larger wave need to fit in the wave tank, but also themesh deformation would …” „… options are available for WECs. For example, overtopping systems collectwater from waves in a large fixed …” „… incoming waves. Thesestructures usually require a large fixed structure, located close to the shore, in …”

Bibliography S. 124-138

„… , Bi-directional fluid–structure interaction for large deforma-tion of layered composite propeller blades, Journal …” „… , Y. L. Young, Utilization of deformation coupling in self-twisting compositepropellers, in …” „… . Boyle, Solvers for large-displacement fluid–structure interac-tion problems: segregated versus …”

Fluid mechanics S. 21-34

„… unstable for a time-step size larger than the critical time-step size. Definitions for thecritical …” „… )Compared to the explicit Euler method, the implicit Euler method is stable and, therefore,allows for larger …” „… unstable for a time-step size larger than the critical time-step size. Definitions for thecritical …”

Fluid-structure interaction S. 35-48

„… propellershape for a large ship based on experimental tests, the dimensionless propeller parameterscan be used to …” „… – enabling affordable experimental tests for larger ship propellersas well.344 Fluid-structure interactionThe …” „… fluidfield is strongly influenced by the deformation of the fluid domain, a two-way couplingapproach should …”

Ship propeller S. 81-117

„… details about the implementation of the wake roll-uprealized through a wake deformation can be found in …” „… deformation can be found in [114, p. 22].The fluid simulation setup presented here was further validated on a …” „… with larger time steps and correspondingly largerangle increments, as can be seen in Fig. 5.11, where …”

doi.org/10.51202/9783186360182

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