VDI Verlag eLibrary

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

Marcel König

Series: Mechanik/Bruchmechanik

Volume 351 2018

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„… 4 Coupled Problems Having reviewed the fluid and structural equations in Chapter 2 and 3, we will …” „… Ω̄ := Ω ∪ ∂Ω of Ω. Multifield problems can be classified into surfaceor geometrically coupled and …” „… volume- or materially coupled problems [110, p. 27], see Figure 4.1. In surface-coupled problems …”

Introduction S. 1-4

„… 1 Introduction Coupled multifield problems in general and fluid-structure interaction (FSI …” „… problems can be categorized into weakly- and strongly-coupled problems. In the case of weakly-coupled …” „… strongly-coupled problems, the situation is different: The subproblems interact with each other, and changes in one …”

Titelei/Inhaltsverzeichnis S. I-XVI

„… Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in Maritime …” „… Applications Partitioned Solution Strategies for Strongly-Coupled Fluid-Structure Interaction Problems in …” „… Strongly-Coupled Fluid-Structure Interaction Problems in Maritime Applications Fortschr.-Ber. VDI Reihe 18 Nr …”

Conclusions and Outlook S. 241-251

„… applied to solve highly complex strongly-coupled multifield problems. In particular, it was demonstrated …” „… strongly-coupled FSI problems arising in the context of maritime applications. Major advantages of the partitioned …” „… procedure for the solution of weaklyand strongly-coupled multifield problems. Based upon the idea of …”

Bibliography S. 252-266

„… . Düster. “A flexible C++ framework for the partitioned solution of strongly coupled multifield problems …” „… . “Weak or strong – On coupled problems in continuum mechanics”. Habilitation thesis. Stuttgart, Germany …” „… : University of Stuttgart, 2010. [110] Bernd Markert. “A survey of selected coupled multifield problems in …”

Benchmark Problems S. 158-217

„… acceleration schemes seem to be preferable for the solution of coupled multifield problems using a partitioned …” „… conduct a strongly-coupled FSI analysis for this application. 211 6 Benchmark Problems 0 1 2 3 4 5 6 7 0 5 …” „… 6 Benchmark Problems In this chapter, we present several numerical examples in order to verify and …”

Advanced Applications S. 218-240

„… sophisticated problems. As the title of this work suggests, the problems are adopted from the maritime industry …” „… that the partitioned solution approach is suitable even for such complex kinds of strongly-coupled …” „… problems. 7.1 Floating Offshore Wind Turbine In recent years, offshore wind energy has become an …”

Software Library comana S. 98-157

„… the partitioned solution process. In the case of surface-coupled problems, these are the solvers …” „… case of a surface-coupled problem or in the subdomains Ω1, . . . , Ωm in the case of a volumecoupled …” „… time increment. In order to steer the coupled solution procedure and organize the data transfer between …”

Fluid Problems S. 5-24

„… Fluid Problems For the numerical solution of the discretized system of coupled partial differential …” „… 2 Fluid Problems In this chapter, we discuss the governing fluid equations and present two …” „… restraints of the flow being inviscid and irrotational. In many problems in the maritime sector, this …”

Structural Problems S. 25-41

„… 3 Structural Problems In this chapter, we consider the structural subproblem of the coupled problem …” „… current configuration Ωx. Adopting 25 3 Structural Problems ΩxΩX ϕ X x Figure 3.1: Reference configuration …” „… isochoric) component F̄ , such that [50] F = F̂ F̄ . (3.19) 27 3 Structural Problems For the dilatational …”

doi.org/10.51202/9783186351180

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Partitioned solution strategies for electro-thermo-mechanical problems applied to the field-assisted sintering technology

Patrick Erbts

Series: Mechanik/Bruchmechanik

Volume 345 2016

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Solution of coupled problems S. 79-144

„… 79 CHAPTER4 Solution of coupled problems This chapter focuses on an in-depth discussion on solving …” „… coupled multi-field problems, paying special attention to partitioned solution strategies. After a …” „… coupling strategies on the example of volume- and surface-coupled problems are devised and some aspects of …”

Introduction S. 1-7

„… problems often requires a solution of coupled multi-field systems. Nowadays, commercial solvers can be used …” „… to carry out coupled simulations for a large number of different problems. However, these solvers are …” „… literature. 1.1.2 Solution of coupled problems In order to simulate the FAST process, a multi-physically …”

Titelei/Inhaltsverzeichnis S. I-XVI

„… – Numerical thermal radiation – Convergence acceleration – Fluid-structure interaction – Coupled problems …” „… Dedicated to engineers and scientists in the field of coupled problems and computational mechanics, this …” „… thesis addresses partitioned solution strategies for electro-thermo-mechanically coupled problems …”

Bibliography S. 186-204

„… stable fractional step method for non-linear coupled thermomechanical problems. International Journal for …” „… analysis of coupled thermoelastic problems. Computer Methods in AppliedMechanics and Engineering …” „… Computational Methods for Coupled Problems in Science and Engineering, 2009. [143] K.J. Quint, S. Hartmann, S …”

Conclusions and outlook S. 171-173

„… approaches are applied to solve multi-physically coupled problems. The intended purpose is to develop a …” „… these fields are introduced and the corresponding coupled initial-boundary value problem is formulated …” „… as an additional physical field in this thesis. A radiation solver is coupled to the thermal field …”

Governing equations S. 8-44

„… coupled problems. This leads to a coupled initial boundary value problem of a system of partial …” „… 8 2. Governing equations CHAPTER2 Governing equations Descriptions of multi-physically coupled …” „… engineering problems require a mathematical formulation of the process and a substantiated background in the …”

Numerical examples S. 145-170

„… applied to multiphysical problems with nf > 2 fields. The general purpose is to find the best suited …” „… powder, which was developed by ROTHE [146]. 5.1 Electro-thermo-mechanically coupled problem Within the …” „… temperature coefficient. 5.1. Electro-thermo-mechanically coupled problem 147 Top View Side View ū = 0 ϕ̄(t …”

Numerical methods S. 45-78

„… approximate solution to the coupled problem with the aid of computers. Special attention is placed on …” „… desired. To achieve this, a variational form of the coupled problem is derived which is also known as weak …” „… multi-physically coupled context, a linearization would consequently have to linearize the nonlinear problem with …”

doi.org/10.51202/9783186345189

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Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

Jorrid Lund

Series: Mechanik/Bruchmechanik

Volume 360 2024

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Introduction S. 1-4

„… coupled problems.The BEM panMARE [24] was developed at the “Institute for Fluid Dynamics and ShipTheory …” „… developed for thefast and accurate simulation of structural, fluid, and coupled problems.The BEM panMARE [24 …” „… for this purpose are focused on eithersolving fluid or structural problems.The development of FSI …”

Summary and outlook S. 118-123

„… leadsto enormous computational cost in combination with FSI if used for large-scale problems.Furthermore …” „… cost in combination with FSI if used for large-scale problems.Furthermore, problems with high mesh …” „… 9 Summary and outlookThis work demonstrated the benefit of partitioned fully-coupled FSI …”

Bibliography S. 124-138

„… coupled multifield problems, Computers & Mathematics withApplications 72 (2016) 1764–1789. doi:10.1016 …” „… partitionedsolution of strongly coupled multifield problems, Computers & Mathematics withApplications 72 (2016 …” „… Strongly-Coupled Fluid-Structure In-teraction Problems in Maritime Applications, Ph.D. thesis, Technische …”

Fluid-structure interaction S. 35-48

„… problems. Many different existingcommercial and in-house solvers are coupled to comana. For solving …” „… commercial FEM solver ANSYS [74] are (amongst others) coupled to comana. Forsolving fluid problems, the …” „… fluid solvers coupled to comana.Different solvers for the fluid and structural problems are added as …”

Floating windturbine S. 49-61

„… , the solver can continue as in the unmodifiedsolution process.For most of the simulations, the problems …” „… often arisewhen the problems are solved in a parallel procedure and require special …” „… concepts introduced in the last three chapters are applied tocomplex and application-related problems. The …”

Ship propeller S. 81-117

„… non-differentiable problems.Optimization problems generally require certain properties of the optimization algorithm …” „… for these highly nonlinear and non-differentiable problems.Optimization problems generally require …” „… problem,the effect is analyzed in more detail here.The reason for the different results between a coupled FSI …”

Titelei/Inhaltsverzeichnis S. I-VIII

„… carbon-reinforced polymer is optimized with an evolutionary algorithm based on coupled simulations concerning …” „… carbon-reinforced polymer is optimized with an evolutionary algorithm based on coupled simulations concerning …” „… theoretical basis for the simulation of fluid and structural problems is introduced– in combination with the …”

Fluid mechanics S. 21-34

„… exact results with static condensation in this formulation for linear static problems.Nonetheless, a …” „… the corre-sponding methods that are commonly used for the simulation of fluid mechanic problems,namely …” „… time integration method is used, a coupled system of equations has to besolved simultaneously. For the …”

Submersible mixer S. 71-80

„… here are performed with panMAREon the fluid side and ANSYS on the structural side coupled by the …” „… mixer in theexperiment can, due to self-penetration, lead to problems with the wake discretized bywake …” „… of the submersible mixer in theexperiment can, due to self-penetration, lead to problems with the …”

doi.org/10.51202/9783186360182

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Systematic Derivation of Objective Requirements on Vehicle Steering System

Martin Ralf Münster

Series: Verkehrstechnik/Fahrzeugtechnik

Volume 819 2023

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Substructuring the Vehicle Steering S. 13-34

„… which is often found at modern vehicles.1314 2 Substructuring the Vehicle SteeringFigure 2.2: Coupled …” „… substructuring originates from dealing with “big problems” by dividing theminto smaller subsystems, which are …” „… aspect is important to “top-down” problems with sparse descriptionof the desired dynamics. In such cases …”

Introduction S. 1-12

„… level, even though the latter relate tothe coupled behavior of multiple subsystems. The role of …” „… application of Solution Spaces to high-dimensional problems for thedesign of mechanical structures are given …” „… the front tires on theroad. Coupled through the steering rack and the tie-rods with the left and right …”

Bibliography S. 195-204

„… Problems”.In: Journal of Manufacturing Science and Engineering 84.1 (1962), pp. 21–34.[79] Moorhouse, A. T …” „… StructuralModification Problems”. In: Shock and Vibration 11.3 (2004), pp. 295–309.[23] Dahl, P. R. A Solid Friction …” „… Domain Decomposition Method for TheSolution of Partially Axisymmetric Acoustic Scattering Problems. Part …”

Resulting Subsystem Requirements S. 123-152

„… coefficients may be used for prediction of vehicle performanceat the coupled (global) system, in order to …” „… make the linear four-pole methodstill applicable to problems with this kind of nonlinearity where …” „… assembling of subsystem dynamics in order to predictthe performance of the coupled (vehicle) system, the …”

Requirement-Based Module Design Using Solution Spaces S. 153-188

„… toconcrete design problems of, e. g., the steering and front-axle subsystems design, can be welldemonstrated …” „… , ANNs can be employedto solve a wide spectrum of problems in optimization, pattern recognition …” „… learning machine for two-groupclassification problems (“good” vs. “bad”). Thereby, the support vectors …”

Titelei/Inhaltsverzeichnis S. I-XVI

„… Intensityµ Friction coefficientIXX NomenclatureΩ Angular velocityω Angular frequencyΦ Combined, coupled phase …” „… werden Methoden derSubstrukturtechnik im Frequenzbereich auf die Problemstellung angewandt.Im Verlauf der …”

doi.org/10.51202/9783186819123

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

Wadhah Garhuom

Series: Mechanik/Bruchmechanik

Volume 359 2024

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Bibliography S. 135-152

„… Solution Strategies for Strongly-Coupled Fluid-Structure In-teraction Problems in Maritime Applications …” „… flexible C++ framework for the partitionedsolution of strongly coupled multifield problems. Computers …” „… method for elasto-plastic problems. Applied Mathematicsand Mechanics, 35(10):1239–1248, 2014.[6] I …”

doi.org/10.51202/9783186359186

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Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 90 (2015) Issue 07-08 ISSN Online: 0005-6650

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Peter Wriggers Neue Entwicklungen in der Mechanik/New Developments in Mechanics S. 330-334

„… angepassten Simulationswerkzeugen für komplexe Probleme des Bauingenieurwesens ist immer noch von großer …” „… as well as to the design of simulation tools for complex problems. Furthermore many data in Civil …” „… kann dann zu genaueren Vorhersagen des Bauteilverhaltens führen, insbesondere wenn Probleme wie z. B …”

doi.org/10.37544/0005-6650-2015-07-08

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A partitioned solution approach for fluid-structure interaction problems in the arterial system

Lars Radtke

Series: Mechanik/Bruchmechanik

Volume 353 2020

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Introduction S. 1-5

„… , but also regions with different accuracy requirements may lead to coupled problems. For example, the …” „… mechanics subproblem. Numerical solution approaches for coupled problems can be classified as either …” „… thermo-mechanically or otherwise coupled problems. Likewise, the modeling pipeline may be used to create high-order …”

Titelei/Inhaltsverzeichnis S. I-X

„… . . . . . . . . . . . . . . . . . 18 3 Mechanical modeling of the arterial system 23 3.1 Coupled problems …” „… . . . . . . . . . . . . . . . . . . . . 179 5.2 Coupled benchmark problems . . . . . . . . . . . . . . . . . 183 5.2.1 Multi-body system …” „… partitioned solution approach for fluid-structure interaction problems in the arterial system A …”

Summary and Outlook S. 253-256

„… methods are generally applicable for the solution of strongly coupled multifield problems. Convergence …” „… the scope of coupled problems. Further, the methods for geometry and mesh generation as well as the …” „… in which specialized field solvers applying different numerical methods are coupled. Partitioned …”

Numerical investigations S. 153-219

„… be meaningful, see Figure 5.25. 5.2 Coupled benchmark problems In the following, several benchmark …” „… ) − f (i+1), (5.36) 184 5.2 Coupled benchmark problems which must hold for every point mass i with …” „… Figure 5.27 give rise to the following statements: 186 5.2 Coupled benchmark problems Figure 5.27 …”

Applications S. 220-252

„… study is performed in order to demonstrate the applicability of the approach for larger scale problems …” „… segments. 6.1.2 Coupled simulations Using the same modeling approach followed in Section 5.3, a fully …” „… systolic phase. Fig. 6.7 shows the OSI distributions obtained from the coupled simula- 225 6 Applications …”

Mechanical modeling of the arterial system S. 23-68

„… useful – for this or another reason. In view of this, a general formulation for coupled problems is …” „… 3.1 Coupled problems 3.1 Coupled problems Coupled problems are characterized by the fact that multiple …” „… computing im- 26 3.1 Coupled problems proved approximations ũ (p) i of the new states u (p) k+1. This is …”

Bibliography S. 269-288

„… partitioned solution of strongly coupled multifield problems”. In: Computers & Mathematics with Applications …” „… Mechanics Analysis with the ST and ALE- VMS Methods”. In: Numerical Simulations of Coupled Problems in …” „… Conference on Computational Methods for Coupled Problems in Science and Engineering. Ed. by S. Idelsohn, M …”

Numerical methods S. 69-152

„… chapter lies on the introduction of these two methods and on the corresponding discretized problems …” „… ), the coupling procedure according to the definition of the coupled problem introduced in Section 3.1 is …” „… boundary conditions are needed in order to use the methods in a coupled cardiovascular FSI simulation …”

Fluid-structure interaction in the arterial system S. 6-22

„… applications involving strongly coupled multifield problems, see e.g. [68, 122]. The development of coupling …” „… of this chapter, the state-of-the-art in computational modeling of FSI problems is outlined. 2.1 The …” „… ]. One of the major challenges when modeling such fluid-solid-growth problems are the different time …”

doi.org/10.51202/9783186353184

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The hierarchical finite cell method for problems in structural mechanics

Meysam Joulaian

Series: Mechanik/Bruchmechanik

Volume 348 2017

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Bibliography S. 140-154

„… Proceedings of the ECCOMAS Thematic Conference on Coupled Problems.(M. Papadrakakis, E. Onate), 2005. [73 …” „… . Matthies. A coupled meshfree/meshbased method for complex fluidstructure interaction problems. In …” „… finite element method for elasto-plastic problems. Applied Mathematics and Mechanics, 35(10):1239–1248 …”

Finite cell method for problems in solid mechanics S. 5-26

„… 5 Chapter 2 Finite cell method for problems in solid mechanics In this chapter, we focus on the …” „… the governing equations In this thesis, we deal with the numerical simulation of problems in …” „… × ] 0, t̂ [ (2.1) 6 2 Finite cell method for problems in solid mechanics where ∼σ is the stress tensor …”

Local enrichment of the FCM S. 72-110

„… , or problems containing singularities resulting from reentrant corners or cracks, just to name a few …” „… FCM with regard to such problems and, accordingly, propose several approaches to obtain a reliable …” „… simulation procedure. 4.1 FCM for problems with material interfaces In order to understand the solution …”

The spectral cell method S. 111-132

„… loadings. This falls into the category of wave propagation problems. Important applications in this field …” „… cracks [17], to name a few. In order to account for problems like this, the numerical model must be able …” „… difficult to obtain a proper mesh for them. Thus, the numerical analysis of problems in this category poses …”

doi.org/10.51202/9783186348180

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Medical Image Segmentation using Level Sets and Dictionary Learning

Saif Dawood Salman Al-Shaikhli

Series: Elektrotechnik

Volume 415 2016

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Introduction S. 1-10

„… no general method for solving all segmentation problems. Instead, the segmentation methods have to be …” „… efficient and robust automatic image analysis methods, designed to the problems encountered in medical …” „… 4 1 Introduction image. Due to the above mentioned problems in MRI and CT images, which make the …”

Coupled Dictionary Learning For Image Segmentation S. 51-82

„… 51 4 Coupled Dictionary Learning For Image Segmentation In this chapter, we present a general …” „… learning methods. 4.1 Voxel-wise Coupled Dictionaries For Brain Tumor Segmentation Recent studies estimated …” „… these image sequences provides different types 52 4 Coupled Dictionary Learning For Image Segmentation …”

Titelei/Inhaltsverzeichnis S. I-VIII

„… . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 4 Coupled Dictionary Learning For Image Segmentation 51 4.1 Voxel-wise Coupled Dictionaries For …” „… Brain Tumor Segmentation . . 51 4.2 Coupled Dictionary Learning With Level-Set Method For Image …” „… . This algorithm is applied to solve single- and multi-region segmentation problems. The third part of …”

Bibliography S. 108-126

„… Pattern Recognition (cs.CV), August, 2015. [5] S. D. S. Al-Shaikhli, M. Yang, B. Rosenhahn. Coupled …” „… Approximations by Piecewise Smooth Functions and Associated Variational Problems. Communications on Pure and …”

doi.org/10.51202/9783186415219

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Softwareagenten-basierte Berechnung interdisziplinärer gekoppelter Simulation

Matthias Jüttner

Series: Rechnerunterstützte Verfahren

Volume 469 2017

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Literaturverzeichnis S. 98-110

„… strong: On coupled problems in continuum mechanics“, Habilitation, Universität Stuttgart, 2010. [84] K …” „… . Hameyer, J. Driesen, H. D. Gersem und R. Belmans, „The Classification of Coupled Field Problems“, IEEE …” „… International Conference on Computational Methods for Coupled Problems in Science and Engineering, 2013. [87] J …”

doi.org/10.51202/9783186469205

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Konstruktion

Browse Volumes: Konstruktion

Konstruktion Volume 74 (2022) Issue 09 ISSN Online: 0720-5953

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Albert Albers, Patrick Haberkern, Jan Holoch, Arn Joerger, Simon Knecht, Robert Renz, Sven Revfi, Micha Schulz, Markus Spadinger Strategische Planung des Entwicklungsrisikos gekoppelter CAE-Methoden/Strategic planning of the development risk of coupled CAE-methods S. 72-77

„… Planung der Entwicklungsak-tivitäten ermöglicht wird.Strategic planning of the development risk of coupled …” „… risk of coupled CAE-methods is made manageable, which enables a strategic planning of the development …” „… Materialeigen-schaften und Bauteilgeometrie. Dies sorgt für Probleme in frühen Phasen der Produktentwicklung in denen die …”

doi.org/10.37544/0720-5953-2022-09

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Konvergenz von OT und IT

Christian Brecher (ed.), Jörg Krüger (ed.), Eckard Uhlmann (ed.), Alexander Verl (ed.), Oliver Riedel (ed.), Armin Lechler (ed.)

Series: Fertigungstechnik

Volume 708 2022

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G. Thiele, Th. Johanni, D. Sommer, J. Krüger Automatisierte Sollwertoptimierung für gekoppelte Systeme unter Verwendung von Topologieinformationen (OptTopo) S. 91-106

„… Problems exponentiell wachsende Rechenaufwand, auch Fluch der Dimensionalität [6] genannt, bildet eine …” „… nichtlineare Probleme COUENNE (Convex Over and Under ENvelopes for Nonlinear Estimation) [16]. Als direkt …” „… bieten einen lokal ableitungsfreien Ansatz für eingeschränkte nichtlineare Probleme und approximieren die …”

doi.org/10.51202/9783186708021

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Fahrerassistenz und Integrierte Sicherheit 2016

VDI Wissensforum GmbH (ed.)

Series: VDI-Berichte

Volume 2288 2016

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L. Dörr, M. Heigl, A. Grzemba, C. Boiger IT-Security-Architektur für Next-Generation Kommunikationssysteme im Automobil S. 283-298

„… the coupled ECU Has a simple IDS, which evaluates local data Can check the firmware of ECU for …” „… manipulation Must send a hash of the loaded firmware to the coupled switch for Integrity Check Each device …” „… Schlüssellängen nicht mehr ausreichend lang sind. Diese Probleme können mit allgemeinen Krypto-Arithmetik-Cores …”

doi.org/10.51202/9783181022887

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Autonomous Systems 2019: An Almanac

Herwig Unger (ed.)

Series: Informatik/ Kommunikation

Volume 864 2019

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M. S. Zahan, J. Ch. Chedjou, K. Kyamakya On the Introduction of Nonlinear Dynamics in Image Processing with Applications S. 199-212

„… tackle the aforementioned problems encounteredwhen processing images. Indeed an efficient image …” „… tosolve image processing tasks/problems. For example, traditional image proces-sing algorithms (based on …” „… popular tools/instruments for solving image processing problems. Theideas of Neural Networks (i.e., ANN …”

J. Ch. Chedjou, K. Kyamakya A Road Trafic \Behavioral Analysis": Mathematical Modeling and Numerical Simulation S. 35-50

„… length) subdivided into three sections. A set of coupled equati-ons is obtained to express the temporal …” „… sections of the road segment. A numerical simulation of the setof coupled equations is carried out in order …” „… developed to solve inherent traffic problems such ascongestion, traffic jams, etc. The addressing of …”

doi.org/10.51202/9783186864109

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Optimierung in der Energiewirtschaft

VDI Wissensforum GmbH (ed.)

Series: VDI-Berichte

Volume 2303 2017

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C. Thurner, A. Martin Minimale Zulässige Modellbeschreibung für eine optimale Kapazitätsplanung S. 119-130

„… Herleitung und Lösung einer MIP-Relaxierung dieses Problems sowie Rechenergebnisse für reale …” „… Komplexität des Problems zu reduzieren, haben wir den nichtlinearen Anteil der Zielfunktion mittels einer …” „… wir untersucht inwiefern die Struktur des Problems ausgenutzt werden kann. In einem ersten Schritt …”

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