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A topology optimization for finite 1D phononic structures with objective function involving tangential derivative quantities using TDBIE

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Acta Mechanica Sinica 2024年第7期40卷 122-136页

作者： Haifeng Gao Jianguo liang Jianglin Liu Yinhui Li haojie lian Toshiro Matsumoto College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030000China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030000China College of Electronic Information and Optical Engineering Taiyuan University of TechnologyTaiyuan 030000China Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan 030000China Department of Mechanical System Nagoya UniversityNagoya 464-8604Japan

The paper proposes a topology optimization method for 1D phononic structures to minimize the tangential component of particle velocity at the objective *** tangential derivative of the boundary integral equation(TDBIE)is employed for the evaluation of the objective function involves the tangential derivative *** topological derivative is derived through the adjoint method and the Neumann boundary condition of the adjoint field is obtained using the *** average topological derivative which is obtained by calculating the average value of the topological derivative in each layer of design domains,is employed for the updating of the level set *** implementations demonstrate the proposed method is effective for the design of the 1D phononic crystals with the objective function involving tangential derivative quantities.

关键词： Boundary element method Topology optimization Phononic structures Tangential derivative

Numerical Aspects of Isogeometric Boundary Element Methods:(Nearly)Singular Quadrature,Trimmed NURBS and Surface Crack Modeling

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Computer Modeling in Engineering & Sciences 2022年第1期130卷 513-542页

作者： Xuan Peng haojie lian Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China

This work presents some numerical aspects of isogeometric boundary element methods(IGABEM).The behavior of hyper-singular and nearly-singular integration is first explored on the distorted NURBS *** numerical treatments are proposed to enhance the quadrature in the framework of isogeometric *** a numerical implementation of IGABEM on the trimmed NURBS is *** on this idea,the surface crack problem is modeled incorporation with the phantom element *** proposed method allows the crack to intersect with the boundary of the body while preserving the original parametrization of the NURBS-based CAD geometry.

关键词： Isogeometric analysis trimmed NURBS singular integration boundary element method surface crack

渤海湾盆地埕北凹陷古近系沉积体系及砂体成因类型

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古地理学报 2024年第4期26卷 834-845页

作者：许鹏连豪杰毕力格胡贺伟郜政辉姜福杰邵龙义中国石油大学(北京)地球科学学院北京102249 中海石油(中国)有限公司天津分公司天津300452 中国矿业大学(北京)地球科学与测绘工程学院北京100083

埕北凹陷是渤海湾盆地渤中坳陷内部的次级构造,其勘探潜力一直受制于对区内砂体成因类型及储集层分布规律的认识。利用钻井岩心、测井曲线及地震反射剖面等资料,对该凹陷古近系沉积特征、砂体成因类型和分布规律进行分析。研究区古近系... 详细信息

埕北凹陷是渤海湾盆地渤中坳陷内部的次级构造,其勘探潜力一直受制于对区内砂体成因类型及储集层分布规律的认识。利用钻井岩心、测井曲线及地震反射剖面等资料,对该凹陷古近系沉积特征、砂体成因类型和分布规律进行分析。研究区古近系发育扇三角洲、辫状河三角洲和湖泊等沉积相,扇三角洲主要发育在凹陷东北侧的陡坡带,岩性以具块状构造的含砾粗砂岩为主,地震反射特征主要表现为楔状的前积退积和杂乱反射,测井相主要表现为低幅齿型、齿状箱型和钟型;辫状河三角洲主要发育在凹陷西南侧的缓坡带,岩性以具交错层理的砂岩为主,地震反射特征主要表现为S形前积和叠瓦状前积,测井相主要表现为箱型、钟型和漏斗型;湖底扇受重力流控制,主要发育在凹陷中心的半深湖-深湖区,地震反射特征主要表现为蠕虫状前积反射;滩坝主要发育在湖泊边缘或中央局部隆起区,因受波浪作用控制,沉积特征表现为席状砂质沉积被泥岩包围,地震反射特征主要表现为透镜状反射,测井相主要表现为指状和漏斗型。纵向上,沙三段以辫状河三角洲、扇三角洲和湖泊沉积相为主,沙一二段以辫状河三角洲、扇三角洲和湖泊沉积为主,东三段以辫状河三角洲、扇三角洲和湖泊沉积为主,东二段以辫状河三角洲和湖泊沉积为主,扇三角洲发育规模较小。埕北凹陷古近系砂体的生成和发育主要受构造活动、源区物源供给、微古地貌形态和湖平面变化等因素控制,主要发育扇三角洲砂体、辫状河三角洲砂体、湖底扇砂体和滩坝砂体。

关键词：渤海湾盆地埕北凹陷古近系沉积相砂体成因类型

Recent Advances of Deep Learning in Geological Hazard Forecasting

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Computer Modeling in Engineering & Sciences 2023年第11期137卷 1381-1418页

作者： Jiaqi Wang Pengfei Sun Leilei Chen Jianfeng Yang Zhenghe Liu haojie lian Key Laboratory of in-Situ Property-Improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China School of Architectural and Civil Engineering Huanghuai UniversityZhumadian463003China School of Energy Engineering Xi’an University of Science and TechnologyXi’an710054China

Geological hazard is an adverse geological condition that can cause loss of life and *** prediction and analysis of geological hazards is an important and challenging *** the past decade,there has been a great expansion of geohazard detection data and advancement in data-driven simulation *** particular,great efforts have been made in applying deep learning to predict *** understand the recent progress in this field,this paper provides an overview of the commonly used data sources and deep neural networks in the prediction of a variety of geological hazards.

关键词： Geological hazard deep learning neural networks geohazard data sources earthquake volcanic

Isogeometric Boundary Element Analysis for 2D Transient Heat Conduction Problem with Radial Integration Method

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Computer Modeling in Engineering & Sciences 2021年第1期126卷 125-146页

作者： Leilei Chen Kunpeng Li Xuan Peng haojie lian Xiao Lin Zhuojia Fu College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China Key Laboratory of In-Situ Property-ImprovingMining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China Institute for Computational Engineering Faculty of ScienceTechnology and CommunicationUniversity of LuxembourgLuxembourg The York Management School University of YorkYorkYO105GDUK College of Mechanics andMaterials Hohai UniversityNanjing211100China

This paper presents an isogeometric boundary element method(IGABEM)for transient heat conduction *** Non-Uniform Rational B-spline(NURBS)basis functions,which are used to construct the geometry of the structures,are employed to discretize the physical unknowns in the boundary integral formulations of the governing *** extraction technique is employed to accelerate the evaluation of NURBS basis *** adopt a radial integration method to address the additional domain *** numerical examples demonstrate the advantage of IGABEM in dimension reduction and the seamless connection between CAD and numerical analysis.

关键词： Isogeometric analysis NURBS boundary element method heat conduction radial integration method

Resolving Domain Integral Issues in Isogeometric Boundary Element Methods via Radial Integration:A Study of Thermoelastic Analysis

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Computer Modeling in Engineering & Sciences 2020年第8期124卷 585-604页

作者： Shige Wang Zhongwang Wang Leilei Chen haojie lian Xuan Peng Haibo Chen College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China Key Laboratory of In-situ Property-improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China Institute for Computational Engineering Faculty of ScienceTechnology and CommunicationUniversity of LuxembourgEsch-sur-AlzetteLuxembourg Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei230026China

The paper applied the isogeometric boundary element method(IGABEM)to thermoelastic *** Non-Uniform Rational B-splines(NURBS)used to construct geometric models are employed to discretize the boundary integral formulation of the governing *** to the existence of thermal stress,the domain integral term appears in the boundary integral *** resolve this problem by incorporating radial integration method into IGABEM which converts the domain integral to the boundary *** this way,IGABEM can maintain its advantages in dimensionality reduction and more importantly,seamless integration of CAD and numerical analysis based on boundary *** algorithm is verified by numerical examples.

关键词： Isogeometric analysis NURBS boundary element method thermoelastic radial integration method

Monte Carlo Simulation of Fractures Using Isogeometric Boundary Element Methods Based on POD-RBF

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Computer Modeling in Engineering & Sciences 2021年第7期128卷 1-20页

作者： haojie lian Zhongwang Wang Haowen Hu Shengze Li Xuan Peng Leilei Chen Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China School of Architecture and Civil Engineering Huanghuai UniversityZhumadian463003China College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China Artificial Intelligence Research Center National Innovation Institute of Defense TechnologyBeijing100071China Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China

This paper presents a novel framework for stochastic analysis of linear elastic fracture *** Carlo simulation(MCs)is adopted to address the multi-dimensional uncertainties,whose computation cost is reduced by combination of Proper Orthogonal Decomposition(POD)and the Radial Basis Function(RBF).In order to avoid re-meshing and retain the geometric exactness,isogeometric boundary element method(IGABEM)is employed for simulation,in which the Non-Uniform Rational B-splines(NURBS)are employed for representing the crack surfaces and discretizing dual boundary integral *** stress intensity factors(SIFs)are extracted by M integral *** numerical examples simulate several cracked structures with various uncertain parameters such as load effects,materials,geometric dimensions,and the results are verified by comparison with the analytical solutions.

关键词： Monte Carlo simulation POD RBF isogeometric boundary element method fracture

渤海湾盆地沙南凹陷古近系中深层砂岩储层特征与岩性油气藏勘探

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地质论评 2024年第3期70卷 1145-1158页

作者：胡贺伟许鹏于海波连豪杰姬新元丁熠然邵龙义中海石油(中国)有限公司天津分公司渤海石油研究院天津300452 中国矿业大学(北京)地球科学与测绘工程学院北京100083

渤海湾盆地沙南凹陷陡坡带古近系沙河街组二段发育辫状河三角洲相砂岩储集层,该储层受构造位置、埋藏速率、古地温变化、断裂作用的影响,在不同构造区特别是中深层,其物性具有明显的差异性。笔者等利用钻井、测井、地震及分析化验等资料... 详细信息

渤海湾盆地沙南凹陷陡坡带古近系沙河街组二段发育辫状河三角洲相砂岩储集层,该储层受构造位置、埋藏速率、古地温变化、断裂作用的影响,在不同构造区特别是中深层,其物性具有明显的差异性。笔者等利用钻井、测井、地震及分析化验等资料,对中深层砂岩储层沉积相、成岩作用及孔隙演化特征进行研究,提出优质储层的主控因素及演化规律。结果表明,研究区中深层砂岩以岩屑长石砂岩为主,孔隙以粒间溶孔、粒内溶孔为主,储层存在中孔中渗型、中孔低渗型、低孔低渗型和低孔特低渗型4类,且以中孔低渗型为主。储层孔隙总体比较发育,储层整体表现为中等孔隙度、中等渗透率,储层物性较好。对区内优质储层发育的控制因素进行研究表明,富含石英、长石的物源区母岩是区内优质储层发育的物质基础,三角洲分流河道沉积相是优质储层发育的主要沉积相类型,成岩晚期方解石胶结物经过强溶蚀作用是优质储层发育的关键因素。对中深层优质储层时空演化规律分析表明,沙南凹陷南次洼曹妃甸14-e构造区发育辫状河三角洲相砂体,且这些砂体都位于有效烃源岩内,油气运聚条件优越,所以岩性油气藏勘潜力较大。已钻井也证明了区内厚油层的存在,说明该区是沙南凹陷岩性油气藏勘探最有利场所。

关键词：储层特征影响因素岩性油气藏中深层勘探古近系沙南凹陷渤海湾盆地

Noise Pollution Reduction through a Novel Optimization Procedure in Passive Control Methods

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 1-18页

作者： haojie lian Leilei Chen Xiao Lin Wenchang Zhao Stephane P.A.Bordas Mingdong Zhou Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China Henan International Joint Laboratory of Structural Mechanics and Computational Simulation Huanghuai UniversityZhumadian463000China College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China The York Management School University of YorkYorkYO105DDUK CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of ChinaHefei230027China Institute for Computational Engineering Faculty of ScienceTechnology and CommunicationUniversity of LuxembourgLuxembourgSA28PPUK School of Engineering Cardiff UniversityCardiffCF243AAUK Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China

This paper proposes a novel optimization framework in passive control techniques to reduce noise *** geometries of the structures are represented by Catmull-Clark subdivision surfaces,which are able to build gap-free Computer-Aided Design models and meanwhile tackle the extraordinary points that are commonly encountered in *** acoustic fields are simulated using the isogeometric boundary elementmethod,and a density-based topology optimization is conducted to optimize distribution of sound-absorbing materials adhered to structural *** approach enables one to perform acoustic optimization from Computer-Aided Design models directly without needingmeshing and volume parameterization,thereby avoiding the geometric errors and time-consuming preprocessing steps in conventional simulation and optimization *** effectiveness of the present method is demonstrated by three dimensional numerical examples.

关键词： Noise control topology optimization Catmull-Clark subdivision surfaces isogeometric analysis boundary element methods