报 告 人：澳大利亚新南威尔士大学 Chongmin Song 教授
报告题目：Towards Automation of Numerical Simulation from CAD Models and Digital Images
报告时间：4月23日（星期三）下午3：00-4：30
报告地点：安中大楼B328
附：
Towards Automation of Numerical Simulation from CAD Models and Digital Images
Chongmin Song
School of Civil & Environmental Engineering,
University of New South Wales, Sydney, NSW 2052, Australia
Abstract:
Research on numerical simulationtechniques has transformed the way structuralanalyses and designs are performed in engineeringpractice. A vital component of the researchis the automation of the complete numerical simulation process, starting withpre-processing.In spite of the significant progress researchers have made in this area, the numerical modelling of engineering structures is too often still a time-consuming and daunting task.Furthermore, the numerical simulation based on digital images, which is increasingly popular owing to the rapid advance in digital imaging technologies, poses further challenges.
In this talk, a novel approach for the efficient automation of numerical modellingprocesses directly from CAD models and digital images will bepresented.A general n-sided-polygon element based on the concept of the scaled boundary finite element method will be introduced. This polygon element greatly simplifies the mesh generation. It combines ideally with aquadtree mesh for the automation of the numerical modelling process: 1) The generation of quadtree meshes of square elements from CAD models and digital images is highly efficient and ideally suited to moving boundaries and adaptive analysis; 2) Squares with mid-side nodes are treated as polygon elements eliminating hanging nodes; 3) Curved boundaries of a CAD model are handledwith high-order polygon elements without requiring local mesh refinement; 4) The amount of computation for element analysis is significantly reduced due to the geometrical similarity of the squares in a quadtree mesh; 5) No enrichment is required for modeling stress/strain singularity. The accuracy, efficiency and robustness of the proposed technique are demonstrated with numerical examples. Potential research and applicationsof this novel technique in structural and material modellingwill be discussed.
Bio:
Dr. Chongmin Song is a Professor at the School of Civil & Environmental Engineering, University of New South Wales. He obtained the degree of Bachelor of Engineering from Tsinghua University, China and the degree of Doctor of Engineering from the University ofTokyo, Japan. His current research interests are on the development of advanced numerical methods and their application to structural and geotechnical engineering. He is one of the two original creators of the scaled boundary finite element method.He has published more than 80 papers in top-tier archive journals.
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建筑工程学院
建筑工程学院高性能建筑结构与材料研究所
2014年4月17日