2021-03-08 13:30 Analyzing and controlling the nonlinear dynamics of engineering structures using hybrid analytic-numerical methods
演 講 者：田孟軒 國立清華大學動力機械工程學系助理教授
組 別：全體組別
演講時間：2021-03-08 13：30
演講地點：MEA401演講廳
演講摘要︰
Understanding and utilizing the nonlinear dynamics of complex structures are of crucial important for many engineered systems. These systems include complex mechanical/aerospace systems where intermittent contact significantly affects performance such as cracked/damaged structures and nonlinear energy harvesters. Accurate prediction of the dynamics of these systems requires appropriate modeling of piecewise-linear (PWL) nonlinearities induced by the contact behavior, and hence eliminates the use of efficient linear analysis techniques and obstruct the development of new technologies. In this talk, I will introduce a new class of effective techniques that enable efficient modeling and controlling of the dynamics of complex PWL systems. Both transient and steady-state dynamic responses can be analyzed with several orders of magnitudes speed-up compared to current techniques. Also, the applications of the general methods in two engineering areas will be introduced: (1) modeling the nonlinear dynamics of damaged/cracked structures and (2) the active control for optimized vibration performance of energy harvesters. The proposed techniques provide an efficient way to monitor and control the dynamics of PWL systems so that more reliable damage monitoring and more effective vibration energy harvesting can be achieved through this research.