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    加拿大约克大学机械工程系系主任Zheng Hong (George) Zhu院士学术报告
    点击量: 录入时间:2018-06-28

    应国际应用力学中心邀请,加拿大约克大学机械工程系系主任Zheng Hong (George) Zhu院士来访我院并作学术报告

    报告题目:  Hamiltonian Nodal Position Finite Element Method and its Application in Tether Dynamics

       人:Prof. Zhu ZhengHong York University

    报告时间:2018629日(星期五)15:00-16:00

            点:教一楼南二层 第二会议室

    Abstract

     

     

    This work addresses the challenges faced by the error accumulation over long-term numerical simulation for tethers undergoing large translational and rotational motion. A high accurate Hamiltonian nodal position finite element method is proposed to deal with the challenges. The new formulation is derived from Hamiltonian theory and solid mechanics. Symplectic difference algorithm is built for numerical solution to optimally preserve the energy and momentum of system. The conservation feature, accuracy and numerical stability of the proposed method is validated by classic mechanics, LS-DYNA simulations and experiments of a three-dimensional circularly towed cable and a free swing cable. All validations and comparisons indicate that the proposed method is conservative, stable and highly accurate.

     

    Biography

    Dr. Zheng H. Zhu is a professor, Tier 1 York Research Chair in Space Technology and Chair of Department of Mechanical Engineering at York University in Toronto, Canada. He received his B.Eng., M.Eng. And Ph.D. degrees in mechanics all from Shanghai Jiao Tong University located in Shanghai, China. He also received the M.A.Sc. In robot control from University of Waterloo and Ph.D. in mechanical engineering from University of Toronto all located in Ontario, Canada. His current research interests include dynamics and control of tethered space system, spacecraft rendezvous, space robot and space debris remove. He has published over 235 articles and conference papers, with 120 peer-reviewed journal publications. Currently, he is the principal investigator (PI) of two CubeSat missions: DESCENT and ESSENCE fully funded by the Canadian Space Agency. He is the fellow of Engineering Institute of Canada, Fellow of ASME and CSME, Associate fellow of AIAA, senior member of IEEE, and licensed Professional Engineer in Ontario, Canada. Dr. Zhu is the Editor-in-chief of the International Journal of Space Science and Engineering, Associate Editor of IEEE Access, and serves on editorial boards of many journals.

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