Engineering with Computers最新文献_第6页

Parameterization, algorithmic modeling, and fluid–structure interaction analysis for generative design of transcatheter aortic valves 用于经导管主动脉瓣生成式设计的参数化、算法建模和流体-结构相互作用分析

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-06-27 DOI: 10.1007/s00366-024-01973-5

Xianyu George Pan, Ashton M. Corpuz, Manoj R. Rajanna, Emily L. Johnson

{"title":"Parameterization, algorithmic modeling, and fluid–structure interaction analysis for generative design of transcatheter aortic valves","authors":"Xianyu George Pan, Ashton M. Corpuz, Manoj R. Rajanna, Emily L. Johnson","doi":"10.1007/s00366-024-01973-5","DOIUrl":"https://doi.org/10.1007/s00366-024-01973-5","url":null,"abstract":"Heart valves play a critical role in maintaining proper cardiovascular function in the human heart; however, valve diseases can lead to improper valvular function and reduced cardiovascular performance. Depending on the extent and severity of the valvular disease, replacement operations are often required to ensure that the heart continues to operate properly in the cardiac system. Transcatheter aortic valve replacement (TAVR) procedures have recently emerged as a promising alternative to surgical replacement approaches because the percutaneous methods used in these implant operations are significantly less invasive than open heart surgery. Despite the advantages of transcatheter devices, the precise deployment, proper valve sizing, and stable anchoring required to securely place these valves in the aorta remain challenging even in successful TAVR procedures. This work proposes a parametric modeling approach for transcatheter heart valves (THVs) that enables flexible valvular development and sizing to effectively generate existing and novel valve designs. This study showcases two THV configurations that are analyzed using an immersogeometric fluid–structure interaction (IMGA FSI) framework to demonstrate the influence of geometric changes on THV performance. The proposed modeling framework illustrates the impact of these features on THV behavior and indicates the effectiveness of parametric modeling approaches for enhancing THV performance and efficacy in the future.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"61 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

iPINNs: incremental learning for Physics-informed neural networks iPINNs：物理信息神经网络的增量学习

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-06-22 DOI: 10.1007/s00366-024-02010-1

Aleksandr Dekhovich, Marcel H. F. Sluiter, David M. J. Tax, Miguel A. Bessa

{"title":"iPINNs: incremental learning for Physics-informed neural networks","authors":"Aleksandr Dekhovich, Marcel H. F. Sluiter, David M. J. Tax, Miguel A. Bessa","doi":"10.1007/s00366-024-02010-1","DOIUrl":"https://doi.org/10.1007/s00366-024-02010-1","url":null,"abstract":"Physics-informed neural networks (PINNs) have recently become a powerful tool for solving partial differential equations (PDEs). However, finding a set of neural network parameters that fulfill a PDE at the boundary and within the domain of interest can be challenging and non-unique due to the complexity of the loss landscape that needs to be traversed. Although a variety of multi-task learning and transfer learning approaches have been proposed to overcome these issues, no incremental training procedure has been proposed for PINNs. As demonstrated herein, by developing incremental PINNs (iPINNs) we can effectively mitigate such training challenges and learn multiple tasks (equations) sequentially without additional parameters for new tasks. Interestingly, we show that this also improves performance for every equation in the sequence. Our approach learns multiple PDEs starting from the simplest one by creating its own subnetwork for each PDE and allowing each subnetwork to overlap with previously learned subnetworks. We demonstrate that previous subnetworks are a good initialization for a new equation if PDEs share similarities. We also show that iPINNs achieve lower prediction error than regular PINNs for two different scenarios: (1) learning a family of equations (e.g., 1-D convection PDE); and (2) learning PDEs resulting from a combination of processes (e.g., 1-D reaction–diffusion PDE). The ability to learn all problems with a single network together with learning more complex PDEs with better generalization than regular PINNs will open new avenues in this field.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"26 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A machine-learning-based peridynamic surrogate model for characterizing deformation and failure of materials and structures 基于机器学习的围动力代用模型，用于表征材料和结构的变形与失效

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-06-19 DOI: 10.1007/s00366-024-02014-x

Han Wang, Liwei Wu, Dan Huang, Jianwei Chen, Junbin Guo, Chuanqiang Yu, Yayun Li, Yichang Wu

{"title":"A machine-learning-based peridynamic surrogate model for characterizing deformation and failure of materials and structures","authors":"Han Wang, Liwei Wu, Dan Huang, Jianwei Chen, Junbin Guo, Chuanqiang Yu, Yayun Li, Yichang Wu","doi":"10.1007/s00366-024-02014-x","DOIUrl":"https://doi.org/10.1007/s00366-024-02014-x","url":null,"abstract":"It is necessary to determine the input features and output results when constructing a surrogate model within the data-driven neural network. Since the law of features would be restrained when the surrogate mechanical model is employed, it is still a challenge to build a set of natural features to accurately describe the failure process of materials and structures within the traditional continuum mechanics framework. To address this challenge, a robust approach for constructing a surrogate model within the peridynamic-deep learning framework is proposed in this study, which is capable of representing material deformation and failure explicitly. The presented surrogate model integrates both reference and current configuration data to refine input features, enhancing model training. We incorporate a batch-normalization layer before the activation function to mitigate common issues such as slow convergence, low prediction accuracy, and overfitting due to the large numerical differences in the damage dataset. Additionally, numerical analyses on several typical examples are performed to validate the effectiveness and generality of the present model and methodology. The results demonstrate high accuracy in the training set as well as the testing set, confirming the model’s excellent generalization ability and significant potential for material failure analysis. According to this work, more peridynamic expressions can be further derived in the machine-learning-based peridynamic surrogate model by considering the reinforcement learning and symbol space, to potentially broaden its applicability to a wider range of mechanical issues.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"110 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generic volume transfer for distributed mesh dynamic repartitioning 分布式网格动态重新划分的通用体积转移

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-06-18 DOI: 10.1007/s00366-024-02008-9

Guillaume Damiand, Fabrice Jaillet, Vincent Vidal

引用次数: 0

MTGNet: multi-label mesh quality evaluation using topology-guided graph neural network MTGNet：利用拓扑引导图神经网络进行多标签网格质量评估

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-06-01 DOI: 10.1007/s00366-024-02006-x

Haoxuan Zhang, Haisheng Li, Xiaoqun Wu, Nan Li

{"title":"MTGNet: multi-label mesh quality evaluation using topology-guided graph neural network","authors":"Haoxuan Zhang, Haisheng Li, Xiaoqun Wu, Nan Li","doi":"10.1007/s00366-024-02006-x","DOIUrl":"https://doi.org/10.1007/s00366-024-02006-x","url":null,"abstract":"Mesh quality directly affects the accuracy and efficiency of numerical simulation. Mesh quality evaluation aims to evaluate the suitability of the mesh generated in CAE pre-processing for numerical simulation. Recent work has introduced deep neural networks for mesh quality evaluation. However, these methods treat the mesh quality evaluation task as a multi-classification problem, resulting in serious correlations among different quality categories, which makes it difficult to learn the boundaries of different categories. In this paper, we propose a topology-guided graph neural network, MTGNet, which treats the mesh quality evaluation task as a multi-label task. Specifically, we first decomposed the categories in traditional multi-classification problems and obtained three completely orthogonal mesh quality labels, namely orthogonality, smoothness and, distribution. Then, MTGNet introduces a topology-guided feature representation for structured mesh data, which can generate multiple blocks of element-based graphs through the mesh topology. In order to better fuse features in different blocks, MTGNet also introduces an attention-based block graph pooling (ABGPool) method. Experimental results on the NACA-Market dataset demonstrate MTGNet shows superior or at least comparable performance to the state-of-the-art (SOTA) approaches.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"62 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141192598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A general-purpose meshfree Kirchhoff–Love shell formulation 通用无网格基尔霍夫-洛夫壳公式

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-05-31 DOI: 10.1007/s00366-024-01989-x

Jiarui Wang, Yuri Bazilevs

引用次数: 0

An electromagnetic shape optimisation for perfectly electric conductors by the time-domain boundary integral equations 利用时域边界积分方程优化完全电导体的电磁形状

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-05-30 DOI: 10.1007/s00366-024-01990-4

Toru Takahashi

{"title":"An electromagnetic shape optimisation for perfectly electric conductors by the time-domain boundary integral equations","authors":"Toru Takahashi","doi":"10.1007/s00366-024-01990-4","DOIUrl":"https://doi.org/10.1007/s00366-024-01990-4","url":null,"abstract":"This study proposes a shape optimisation framework for unsteady electromagnetic scattering problems on the basis of the time-domain boundary integral equation method, focusing on the perfectly electric conductors (PECs). The boundary-only formulation is ideal for treating a shape optimisation problem in an exterior domain. However, the electromagnetic shape optimisation in concern has been unrealised with the boundary integral approach regardless of the fact that the boundary-type shape derivative has been known in the literature. The first contribution of the present study is to derive a novel expression of the shape derivative in terms of the surface current densities of the primary and adjoint problems, by considering that the surface current density is handled by usual integral equations methods. The second contribution is to clarify the integral representations and equations of the adjoint electromagnetic fields in terms of the reversal time. These theoretical achievements possess a high affinity with the standard spatial discretising approach (i.e. RWG basis) whenever the temporal basis is sufficiently smooth. The numerical experiments confirmed the reliability of the proposed shape optimisation methodology and indicated the capability to deal with scientific and engineering applications.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"44 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient multiscale topology optimization method for frequency response minimization of cellular composites 最小化蜂窝复合材料频率响应的高效多尺度拓扑优化方法

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-05-28 DOI: 10.1007/s00366-024-02000-3

Xiliang Liu, Liang Gao, Mi Xiao

{"title":"An efficient multiscale topology optimization method for frequency response minimization of cellular composites","authors":"Xiliang Liu, Liang Gao, Mi Xiao","doi":"10.1007/s00366-024-02000-3","DOIUrl":"https://doi.org/10.1007/s00366-024-02000-3","url":null,"abstract":"It is vital to control the vibration of cellular composites under harmonic excitation in engineering. Due to numerous design variables and expensive frequency domain integration operation, the majority of multiscale topology optimization methods for frequency response minimization of cellular composites tend to be conservative, where a small number of types of microstructures are considered. This paper proposes an efficient multiscale topology optimization method to minimize the frequency response of cellular composites over specified frequency intervals. This method utilizes multiclass graded lattice unit cells (LUCs) as design candidates, offering great design space to improve the dynamic performance of cellular composites. At microscale, the proposed method leverages Kriging metamodels to replace the the homogenization method in each iteration step, thus accelerating the performance estimation of multiclass graded LUCs. At macroscale, the second-order Krylov subspace with moment-matching Gram-Schmidt orthonormalization (SOMMG) method is introduced to expedite the frequency response analysis of cellular composites. Two types of design variables are employed to construct the Kriging metamodel assisted Uniform Multiphase Materials Interpolation (KUMMI) model, facilitating the concurrent updating of LUCs’ classes and relative densities. Several numerical examples are presented to validate the effectiveness and efficiency of the proposed method in minimizing the frequency response of cellular composites.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"21 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141172786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Speculative anisotropic mesh adaptation on shared memory for CFD applications 在共享内存上为 CFD 应用程序进行各向异性网格适应性调整

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-05-25 DOI: 10.1007/s00366-024-01994-0

Christos Tsolakis, Nikos Chrisochoides

引用次数: 0

MPIPN: a multi physics-informed PointNet for solving parametric acoustic-structure systems MPIPN：用于求解参数声学结构系统的多物理信息点网

IF 8.7 2区工程技术

Engineering with Computers Pub Date : 2024-05-18 DOI: 10.1007/s00366-024-01998-w

Chu Wang, Jinhong Wu, Yanzhi Wang, Zhijian Zha, Qi Zhou

{"title":"MPIPN: a multi physics-informed PointNet for solving parametric acoustic-structure systems","authors":"Chu Wang, Jinhong Wu, Yanzhi Wang, Zhijian Zha, Qi Zhou","doi":"10.1007/s00366-024-01998-w","DOIUrl":"https://doi.org/10.1007/s00366-024-01998-w","url":null,"abstract":"Machine learning is employed for solving physical systems governed by general nonlinear partial differential equations (PDEs). However, complex multi-physics systems such as acoustic-structure coupling are often described by a series of PDEs that incorporate variable physical quantities, which are referred to as parametric systems. There are lack of strategies for solving parametric systems governed by PDEs that involve explicit and implicit quantities. In this paper, a deep learning-based Multi Physics-Informed PointNet (MPIPN) is proposed for solving parametric acoustic-structure systems. First, the MPIPN introduces an enhanced point-cloud architecture that encompasses explicit physical quantities and geometric features of computational domains. Then, the MPIPN extracts local and global features of the reconstructed point-cloud as parts of solving criteria of parametric systems, respectively. Besides, implicit physical quantities are embedded by encoding techniques as another part of solving criteria. Finally, all solving criteria that characterize parametric systems are amalgamated to form distinctive sequences as the input of the MPIPN, whose outputs are solutions of systems. The proposed framework is trained by adaptive physics-informed loss functions for corresponding computational domains. The framework is generalized to deal with new parametric conditions of systems. The effectiveness of the MPIPN is validated by applying it to solve steady parametric acoustic-structure coupling systems governed by the Helmholtz equations. An ablation experiment has been implemented to demonstrate the efficacy of physics-informed impact with a minority of supervised data. The proposed method yields reasonable precision across all computational domains under constant parametric conditions and changeable combinations of parametric conditions for acoustic-structure systems.","PeriodicalId":11696,"journal":{"name":"Engineering with Computers","volume":"25 1","pages":""},"PeriodicalIF":8.7,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0