Filter results

Results (354)

Sort by:

Select all Select all

Page 2

Christian Woitzik - Experimental testing and numerical simulation of granules as crash absorber for double hull structures

Partial access

Select

Christian Woitzik

Experimental testing and numerical simulation of granules as crash absorber for double hull structures

Series: Mechanik/Bruchmechanik

Volume 356 2021

Results in this title

Numerical investigation S. 88-112

„… 6 Numerical investigation After obtaining the experimental results, the modelling of the collision …” „… Section 2.1. A brief overview over some of the numerical results for Experiment 1 to 4 is presented in …” „… [72]. An explicit time integration method is applied – which is a common choice for crash and impact …”

Introduction S. 1-5

„… granules will be carried out, followed by a numerical study to describe the mechanical behaviour. In the …” „… commercial FEM tools that are used as standard tools in industry. The numerical methods and material models …” „… sufficiently evaluated with numerical methods in a fairly easy manner. Thus, new designs, such as X-Core …”

Constitutive equations and numerical implementation S. 6-23

„… 2 Constitutive equations and numerical implementation This chapter serves to summarize the …” „… element method. The governing equations and the numerical implementation are shown in the next section …” „… Constitutive equations and numerical implementation referred to as plastic flow. Here, plastic strains arise …”

Bibliography S. 119-136

„… numerical simulation to analyze ship collision, in: International Conference on Collision and Grounding of …” „… [24] J. Amdahl, D. Kavlie, Experimental and numerical simulation of double hull stranding, in: DNV-MIT …” „… . Ringsberg, E. Johnson, M. Hoseini, A. Ulfvarson, Experimental and numerical investigation of bulb impact …”

Determination of bulk particle properties S. 40-63

„… conducted. This approach is called direct identification [137]. On the other hand, a numerical optimization …” „… identification. Due to the approach of a direct parameter identification, followed by a numerical correction …” „… Simulations Figure 4.1: Schematic view of experimental and numerical relations between the different tests and …”

doi.org/10.51202/9783186356185

Marcel König - Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications

Partial access

Select

Marcel König

Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications

Series: Mechanik/Bruchmechanik

Volume 351 2018

Results in this title

Bibliography S. 252-266

„… numerical dissipation for time integration algorithms in structural dynamics”. In: Earthquake Engineering …” „… flow around aircraft”. In: Proceedings of the 3rd International Workshop on Numerical Modelling in …” „… Aerospace Sciences. Bucharest, Romania, 2015. [2] A. Aitken. “On Bernoulli’s numerical solution of algebraic …”

Fluid Problems S. 5-24

„… ) Apparently, the numerical integration of the surface and the volume integrals require the evaluation of the …” „… different numerical methods for their solution. First of all, we derive the Navier-Stokes equations in a …” „… , especially with a view to maritime applications, are of notable interest to engineers. For the numerical …”

Conclusions and Outlook S. 241-251

„… that the proposed solution procedure is very well suited for the numerical treatment of …” „… discretization schemes for their numerical treatment. Following this, we presented a generic partitioned …” „… allows to use different numerical schemes for the discretization of space and time in each of the …”

Benchmark Problems S. 158-217

„… 6 Benchmark Problems In this chapter, we present several numerical examples in order to verify and …” „… benchmark definition, the time step size is changed to Δt = 0.1 s, and the structural time integration …” „… three-dimensional cavity at time t = 24.7 s. radius ρ∞ = 0.9 to reduce numerical damping as compared to the …”

Introduction S. 1-4

„… numerical treatment. Following that, we outline the integration of the subproblems into the partitioned …” „… be prohibitively expensive or impossible. Numerical simulations have therefore evolved as an …” „… computational processing power, numerical simulations of even very complex phenomena have become feasible and …”

Structural Problems S. 25-41

„… finite element method (FEM) for the efficient numerical analysis of the problem. If the body undergoes …” „… numerical methods for their solution in Section 3.2. 3.1 Deformable Body Equations To study the dynamic …” „… amenable to a numerical analysis, we transform the strong form of the equilibrium equations into a weak …”

Advanced Applications S. 218-240

„… particular interest. Substantiated by the results obtained in these numerical studies, it is demonstrated …” „… wind energy offshore. For the numerical studies conducted in this work, a constant density ρa = 1.2 …” „… summarizes the mass properties of the individual components of the floating OWT. For the numerical analysis …”

Titelei/Inhaltsverzeichnis

„… Discretization and Numerical Solution . . . . . . . . . . . . . . . . 14 2.2 Potential Flow Equations …” „… Discretization and Numerical Solution . . . . . . . . . . . . . . . . 23 3 Structural Problems 25 3.1 Deformable …” „… . . . . . . . . . . . . . . . . . . . . . . . . . . 124 5.4.4 Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 5.5 …”

Software Library comana S. 98-157

„… Points_ }; static constexpr std::size_t localSpaceDimension { 2 }; using IntegrationPoint …” „… = Comana::IntegrationPoint; using IntegrationPoints = Array<IntegrationPoint, numberOfIntegrationPoints>; static const …” „… IntegrationPoints & getIntegrationPoints() noexcept; }; An IntegrationPoint combines the coordinates of the sampling …”

Coupled Problems S. 42-97

„… formulated in a manner that allows for a seamless integration into the generic partitioned solution procedure …” „… interpolation schemes are chosen for all the numerical examples presented in Chapter 6 and 7. The interpolation …” „… procedure will certainly result in an unacceptably high numerical effort. It is therefore advisable to …”

doi.org/10.51202/9783186351180

VDI Wissensforum GmbH - Plastics in Automotive Engineering 2017

Partial access

Select

VDI Wissensforum GmbH (ed.)

Plastics in Automotive Engineering 2017

Series: VDI-Berichte

Volume 4348 2017

Results in this title

P. Hörmann, K. Bornemann, F. Flueggen, H. Herten, V. Hohm, T. Ströhlein Lightweight design at Volkswagen S. 203-214

„… , numerical validation and final experimental testing for the development of a so-called FRP door sill tube …” „… context of a validated numerical design. These requirements differ significantly from those of the …” „… testing in a drop-tower rig and a real car crash. The FRP material was characterized for numerical …”

A. Liebsch, R. Kupfer, M. Gude, P. Müller, N. Andricevic Hollow profiles, organo-sheets and LFRT node structures: hybrid components made of fiber-reinforced plastics for automotive serial production S. 215-226

„… . Additional functionalization with injection-molding compound allows the integration of highly complex rib …” „… . Experimental and numerical investigations into overmolding hollow profiles The deepening and expansion of the …” „… , the 'Dresden rocket' The numerical mold-filling simulations were carried out with AUTODESK MOLDFLOW …”

doi.org/10.51202/9783182443483

Christian Redepenning - Pinch-based Methods for Absorption and Extraction Process and Solvent Screening

Partial access

Select

Christian Redepenning

Pinch-based Methods for Absorption and Extraction Process and Solvent Screening

Series: Verfahrenstechnik

Volume 955 2018

Results in this title

Software S. 137-142

„… the shortcut methods. This shortcoming prior to this thesis probably prevented the robust integration …” „… , expandability, as well as numerical efficiency. New interfaces, new prototypes, and new frontends added as part …” „… communication with the numerical routines module and continuation algorithm module. The numerical routines …”

Bibliography S. 173-198

„… ). Numerical continuation, and computation of normal forms. In B. Hasselblatt, & A. B. Katok (Eds.), Handbook …” „… ., Grossmann, I. E., & Miller, D. C. (2015). Simultaneous process optimization and heat integration based on …” „… ., & El-Halwagi, M. (2002). Property integration— a new approach for simultaneous solution of process and …”

Recommendations for further research S. 143-156

„… concepts. General-purpose numerical algorithms can provide such a general solution concept. Local …” „… investigation of the performance of such a concept which is based on general-purpose numerical algorithms. The …” „… correlations. The integration of transport limitations increases the complexity of the separation model which …”

Introduction S. 1-20

„… exploit all potentials to be competitive, including sophisticated methods of heat integration …” „… integration (level 5). Between the low and the high level, each additional level shows more and more details …” „… : separation devices Level 5: heat-integration Figure 1.3.: Hierarchical framework of Douglas (1985 …”

Pinch-based solvent screening for absorption and extraction processes S. 90-136

„… recovery column. The evaluation of additional units, heat integration, or optimization of the operating …” „… for heat integration, rectification, absorption, and extraction perfectly complement. All interactions …” „… absorption-rectification process. Several thousands of solvents are screened and heat integration as well as optimization …”

Pinch-based shortcut method for the design of isothermal extraction columns S. 59-89

„… refers to the existence of the pinch point. Consequently, integration of accurate pinch modeling has the …” „… basic shortcut model with an appropriate numerical solver can be attempted directly. If no solution is …”

doi.org/10.51202/9783186955036

VDI Wissensforum GmbH - International Conference on Gears 2023

No access

Select

VDI Wissensforum GmbH (ed.)

International Conference on Gears 2023

Series: VDI-Berichte

Volume 2422 2023

Results in this title

W. Ramdane, C. Changenet, S. S. Ouali, C. Chevrel-Fraux, P. Casanova Thermal model of a planetary gear set using an isothermal approach S. 451-466

„… or forced convection are taken into account. Then numerical integration is used to estimate …” „… used. This approach assumes that all gearbox’s components have the same temperature. A numerical model …” „… thedetermination of oil temperature during transient regime. Finally, a comparison between numerical and …”

I. Criscuolo, F. Carneiro, G. Guimarães, R. Rego, J. Mascheroni Indirect Selective Laser Sintering: Modeling and analysis of surface densification by shot peening S. 1681-1698

„… explanation to the densification phenomena were based on a numerical approach of the shot peening process. The …” „… and the explanations of the densification phenomena with SP were based on a numerical approach …” „… . The selected element, C3D8R, is a general-purpose linear brick element, with reduced integration (1 …”

A. Beinstingel, F. Haringer, W. Sigmund, M. Heider, B. Pinnekamp, S. Marburg Investigation of Sound and Vibration Behavior of Cylindrical Gears S. 599-618

„… terms of lubrication theory [21]. The numerical solution of the associated Reynold’s equation is carried …” „… suggested by Gumbel [23]. The gear mesh algorithm is established as a nonlinear hybrid analytical-numerical …” „… pair of teeth. The numerical representation is based on the Isogeometric Analysis (IGA) [31] and hence …”

C. Karampatzakis, A. Mihailidis, A. Mantzaflaris, C. Provatidis Contact simulation of tooth flanks using Isogeometric Analysis S. 413-428

„… VDI-Berichte Nr. 2422, 2023 427 [16] Irons, B. M.: Engineering applications of numerical integration in …” „… and enforced at the integration (Gauss) points of the master-worker interface. Not all integration …” „… denotes the integration point belonging to the set of integration points of the worker side (1) within …”

B. Guilbert, D. Dureisseix, P. Velex Hybrid models for the simulation of displacements and stresses in lightweight gears S. 315-328

„… numerical viewpoint, it is found that numerical convergence on gear body stresses at high speeds requires …” „… function is shown in Figure 4-a. The axial dynamic displacement amplitudes obtained by numerical time-step …” „… integration and the recombination of displacements in (2) at the corresponding mesh frequency are represented …”

J. Langhart, S. Ebrahimi, T. Kelichhaus A comparison of time and frequency domain approaches for NVH S. 583-598

„… order differential equations, which are then solved by integration methods using numerical time …” „… with numerical methods. Those methods calculate the response of VDI-Berichte Nr. 2422, 2023 583the …” „… results into 14,000 single integration time step. The CPU time to solve this problem was 15 hours on a …”

S. Sepp, A. Wenig, M. Otto, K. Stahl Acoustical behavior of periodic flank modifications under dynamic operating conditions S. 341-356

„… vector The solution of the general differential equation is solved by a numerical time step integration …” „… separately for each load and speed step by calculating the dynamic conditions in the system using nu-merical …” „… time-step integration. The damping was assumed to be 5 %, which corresponds to typical values found in gear …”

J. D. M. Marafona, J. H. O. Seabra, P. M. T. Marques, R. C. Martins Effect of overlap ratio on gear dynamic behavior and noise level S. 1239-1256

„… the results presented in this work consist on a preliminary numerical analysis of the effect of the …” „… integration algorithm ( = 0.5 and 𝛼 = 0.25); time discretization is the same as for the time-varying mesh …” „… . Considering the numerical simulations performed, it can be concluded that:• Stiffness: increasing the overlap …”

J.-A. Meis Parametric system simulation of load sharing in planetary gearboxes S. 269-280

„… product development. The two main reasons for this are the necessary data and the numerical effort of …” „… in each journal bearing (gained by integration of the pressure distribution) can also be an indicator …”

doi.org/10.51202/9783181024225

1

2

3 ... 71