报告题目：Robust stability chart calculation with Mutli-Dimensional Bisection Method

报告人：Daniel Bachrathy副教授 （布达佩斯科技与经济大学）

报告时间：2023年7月12日（周三）16点

报告地点：明故宫校区A18号楼705会议室

主办单位：航空航天结构力学及控制全国重点实验室、智能装备动力学中心、振动工程研究所、航空学院、校科协、国际合作处

报告内容摘要：

 The stability calculation of dynamical system is an important step of the analysis. There are many techniques to generate these maps, however, for complex system involving time-delay and/or periodic coefficient the computation time is significant. The Multi-Dimensional Bisection Method (MDBM) is an easy way to speed up the computation. It can be order(s) of magnitude faster than the brute-force method, by evaluating the function values around the boundaries only. It can work for higher number of parameters (4-5) and it can also handle vector valued implicit functions and constraints.  

The robustness for the stability calculation be easily performed by adding new parameters to the system, and applying extra equations to formulate the envelopes of the parameter space.The usage of the freely available version of the MDBM method will be demonstrated through different case studies.

报告人简介：

Dr. Daniel Bachrathy is currently the associate professor in Department of Applied Mechanics, Budapest University of Technology and Economics. He achieved his PhD degree in 2009, and the PhD thesis was on “Cutting dynamics and surface quality”, which was carried out at the Department of Applied Mechanics, Budapest University of Technology and Economics, supervised by Prof. Gabor Stepan. He had for the 9 years been acting as research assistant and assistant professor in HAS-BUTE Research Group on Dynamics of Machines and Vehicles and Budapest University of Technology and Economics. His research interests are stability analysis, chatter vibration, numerical methods for stability calculation, mechanical models of milling and turning processes and surface properties