Advanced Modeling and Simulation in Engineering Sciences最新文献_第8页

A nonparametric probabilistic method to enhance PGD solutions with data-driven approach, application to the automated tape placement process 一种非参数概率方法，通过数据驱动方法增强PGD解决方案，应用于自动化胶带放置过程

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-09-21 DOI: 10.1186/s40323-021-00205-5

Ghnatios, Chady, Barasinski, Anais

引用次数: 2

Greedy maximin distance sampling based model order reduction of prestressed and parametrized abdominal aortic aneurysms 基于贪心最大距离采样的预应力及参数化腹主动脉瘤模型阶数降阶方法

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-09-04 DOI: 10.1186/s40323-021-00203-7

Schein, Alexander, Gee, Michael W.

{"title":"Greedy maximin distance sampling based model order reduction of prestressed and parametrized abdominal aortic aneurysms","authors":"Schein, Alexander, Gee, Michael W.","doi":"10.1186/s40323-021-00203-7","DOIUrl":"https://doi.org/10.1186/s40323-021-00203-7","url":null,"abstract":"This work proposes a framework for projection-based model order reduction (MOR) of computational models aiming at a mechanical analysis of abdominal aortic aneurysms (AAAs). The underlying full-order model (FOM) is patient-specific, stationary and nonlinear. The quantities of interest are the von Mises stress and the von Mises strain field in the AAA wall, which result from loading the structure to the level of diastolic blood pressure at a fixed, imaged geometry (prestressing stage) and subsequent loading to the level of systolic blood pressure with associated deformation of the structure (deformation stage). Prestressing is performed with the modified updated Lagrangian formulation (MULF) approach. The proposed framework aims at a reduction of the computational cost in a many-query context resulting from model uncertainties in two material and one geometric parameter. We apply projection-based MOR to the MULF prestressing stage, which has not been presented to date. Additionally, we propose a reduced-order basis construction technique combining the concept of subspace angles and greedy maximin distance sampling. To further achieve computational speedup, the reduced-order model (ROM) is equipped with the energy-conserving mesh sampling and weighting hyper reduction method. Accuracy of the ROM is numerically tested in terms of the quantities of interest within given bounds of the parameter domain and performance of the proposed ROM in the many-query context is demonstrated by comparing ROM and FOM statistics built from Monte Carlo sampling for three different patient-specific AAAs.","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":"31 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of pollutants formation in a diesel engine using numerical simulation 柴油机污染物形成的数值模拟研究

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-09-04 DOI: 10.1186/s40323-021-00204-6

M. Zahid, Khalid S. Syed

引用次数: 0

A generalized Fourier transform by means of change of variables within multilinear approximation 在多元线性近似中采用变量变换的广义傅里叶变换

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-08-04 DOI: 10.1186/s40323-021-00202-8

Chevreuil, Mathilde, Slama, Myriam

{"title":"A generalized Fourier transform by means of change of variables within multilinear approximation","authors":"Chevreuil, Mathilde, Slama, Myriam","doi":"10.1186/s40323-021-00202-8","DOIUrl":"https://doi.org/10.1186/s40323-021-00202-8","url":null,"abstract":"The paper deals with approximations of periodic functions that play a significant role in harmonic analysis. The approach revisits the trigonometric polynomials, seen as combinations of functions, and proposes to extend the class of models of the combined functions to a wider class of functions. The key here is to use structured functions, that have low complexity, with suitable functional representation and adapted parametrizations for the approximation. Such representation enables to approximate multivariate functions with few eventually random samples. The new parametrization is determined automatically with a greedy procedure, and a low rank format is used for the approximation associated with each new parametrization. A supervised learning algorithm is used for the approximation of a function of multiple random variables in tree-based tensor format, here the particular Tensor Train format. Adaptive strategies using statistical error estimates are proposed for the selection of the underlying tensor bases and the ranks for the Tensor-Train format. The method is applied for the estimation of the wall pressure for a flow over a cylinder for a range of low to medium Reynolds numbers for which we observe two flow regimes: a laminar flow with periodic vortex shedding and a laminar boundary layer with a turbulent wake (sub-critic regime). The automatic re-parametrization enables here to take into account the specific periodic feature of the pressure.","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel physics-based and data-supported microstructure model for part-scale simulation of laser powder bed fusion of Ti-6Al-4V 基于物理和数据支持的Ti-6Al-4V激光粉末床熔合微观结构模型

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-07-27 DOI: 10.1186/s40323-021-00201-9

J. Nitzler, C. Meier, K. W. Müller, W. Wall, N. Hodge

引用次数: 1

A simple yet consistent constitutive law and mortar-based layer coupling schemes for thermomechanical macroscale simulations of metal additive manufacturing processes 一种简单而一致的本构定律和基于砂浆的层耦合方案，用于金属增材制造过程的热机械宏观模拟

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-07-23 DOI: 10.1186/s40323-021-00209-1

Sebastian D. Proell, W. Wall, C. Meier

引用次数: 10

Computational method for solving weakly singular Fredholm integral equations of the second kind using an advanced barycentric Lagrange interpolation formula 用改进的重心拉格朗日插值公式求解第二类弱奇异Fredholm积分方程的计算方法

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-06-29 DOI: 10.21203/rs.3.rs-651030/v1

E. S. Shoukralla, Nermin Saber, A. Y. Sayed

{"title":"Computational method for solving weakly singular Fredholm integral equations of the second kind using an advanced barycentric Lagrange interpolation formula","authors":"E. S. Shoukralla, Nermin Saber, A. Y. Sayed","doi":"10.21203/rs.3.rs-651030/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-651030/v1","url":null,"abstract":"In this study, we applied an advanced barycentric Lagrange interpolation formula to find the interpolate solutions of weakly singular Fredholm integral equations of the second kind. The kernel is interpolated twice concerning both variables and then is transformed into the product of five matrices; two of them are monomial basis matrices. To isolate the singularity of the kernel, we developed two techniques based on a good choice of different two sets of nodes to be distributed over the integration domain. Each set is specific to one of the kernel arguments so that the kernel values never become zero or imaginary. The significant advantage of thetwo presented techniques is the ability to gain access to an algebraic linear system equivalent to the interpolant solution without applying the collocation method. Moreover, the convergence in the mean of the interpolant solution and the maximum error norm estimation are studied. The interpolate solutions of the illustrated four examples are found strongly converging uniformly to the exact solutions.","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":"8 1","pages":"1-22"},"PeriodicalIF":0.0,"publicationDate":"2021-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43464520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An SPH framework for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions 流固和接触相互作用问题的SPH框架，包括热-机械耦合和可逆相变

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-06-28 DOI: 10.1186/s40323-021-00200-w

Sebastian L. Fuchs, Christoph Meier, Wolfgang A. Wall, Christian J. Cyron

{"title":"An SPH framework for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions","authors":"Sebastian L. Fuchs, Christoph Meier, Wolfgang A. Wall, Christian J. Cyron","doi":"10.1186/s40323-021-00200-w","DOIUrl":"https://doi.org/10.1186/s40323-021-00200-w","url":null,"abstract":"The present work proposes an approach for fluid–solid and contact interaction problems including thermo-mechanical coupling and reversible phase transitions. The solid field is assumed to consist of several arbitrarily-shaped, undeformable but mobile rigid bodies, that are evolved in time individually and allowed to get into mechanical contact with each other. The fluid field generally consists of multiple liquid or gas phases. All fields are spatially discretized using the method of smoothed particle hydrodynamics (SPH). This approach is especially suitable in the context of continually changing interface topologies and dynamic phase transitions without the need for additional methodological and computational effort for interface tracking as compared to mesh- or grid-based methods. Proposing a concept for the parallelization of the computational framework, in particular concerning a computationally efficient evaluation of rigid body motion, is an essential part of this work. Finally, the accuracy and robustness of the proposed framework is demonstrated by several numerical examples in two and three dimensions, involving multiple rigid bodies, two-phase flow, and reversible phase transitions, with a focus on two potential application scenarios in the fields of engineering and biomechanics: powder bed fusion additive manufacturing (PBFAM) and disintegration of food boluses in the human stomach. The efficiency of the parallel computational framework is demonstrated by a strong scaling analysis.","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":"30 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Non-intrusive nonlinear model reduction via machine learning approximations to low-dimensional operators 低维算子的机器学习近似非侵入非线性模型约简

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-06-17 DOI: 10.1186/s40323-021-00213-5

Zhe Bai, Liqian Peng

引用次数: 9

A semi-analytical coupled simulation approach for induction heating 感应加热半解析耦合模拟方法

Advanced Modeling and Simulation in Engineering Sciences Pub Date : 2021-06-04 DOI: 10.1186/s40323-021-00199-0

Maialen Areitioaurtena, Unai Segurajauregi, Ville Akujärvi, Martin Fisk, Iker Urresti, Eneko Ukar

{"title":"A semi-analytical coupled simulation approach for induction heating","authors":"Maialen Areitioaurtena, Unai Segurajauregi, Ville Akujärvi, Martin Fisk, Iker Urresti, Eneko Ukar","doi":"10.1186/s40323-021-00199-0","DOIUrl":"https://doi.org/10.1186/s40323-021-00199-0","url":null,"abstract":"The numerical simulation of the induction heating process can be computationally expensive, especially if ferromagnetic materials are studied. There are several analytical models that describe the electromagnetic phenomena. However, these are very limited by the geometry of the coil and the workpiece. Thus, the usual method for computing more complex systems is to use the finite element method to solve the set of equations in the multiphysical system, but this easily becomes very time consuming. This paper deals with the problem of solving a coupled electromagnetic - thermal problem with higher computational efficiency. For this purpose, a semi-analytical modeling strategy is proposed, that is based on an initial finite element computation, followed by the use of analytical electromagnetic equations to solve the coupled electromagnetic-thermal problem. The usage of the simplified model is restricted to simple geometrical features such as flat or curved surfaces with great curvature to skin depth ratio. Numerical and experimental validation of the model show an average error between 0.9% and 4.1% in the prediction of the temperature evolution, reaching a greater accuracy than other analyzed commercial softwares. A 3D case of a double-row large size ball bearing is also presented, fully validating the proposed approach in terms of computational time and accuracy for complex industrial cases.","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":"30 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138510051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10