报告题目：Spectral Finite Element Method For Aerospace Structures

报告人：王刚博士

单位：Department of Mechanical and Aerospace Engineering，University of Alabama in Huntsville，USA

时间：2016年6月3日14:00

地点：综合1号实验楼602

Abstract:Recent advances in adaptive materials, such as piezoelectric materials, have enabled the application of smartstructures technology to helicopters for active control of vibrationand noise, damping augmentation, and rotor blade morphing. A hybrid damping scheme using passive constrained layer damping (PCLD)and surface bonded piezoelectric actuator was proposed for vibration and noise control, and stability augmentation in helicopters. In order to evaluate the performance of these treatments, one needs to understand the dynamic behavior of sandwich structures. Natural frequencies, loss factors, mode shape functions, and frequency response functions are required to evaluate the sandwich structures. The analyses of sandwich structures are complicated by the frequency-dependent stiffness and damping properties of viscoelastic materials. The goal of this research is to develop an advanced analysis technique (or framework) to characterize the performance of smart structures for aerospace applications.

In this seminar, an advanced structural analysis approach, i.e., the spectral finite element method (SFEM), will be presented. The spectral element method (also called dynamic stiffness method) is a frequency domain method which combines the features of exact solution approach, Fast Fourier Transformation (FFT) and Inverse FFT, and conventional finite element method. Applications to aerospace structures including sandwich panels with viscoelastic cores, tapered helicopter blades, multi-layered elastic structures, and 2D rectangular plate structures, will be discussed.

Biography: Dr. Gang Wang is an Assistant Professor in the Department of Mechanical and Aerospace Engineering (MAE) at the University of Alabama in Huntsville (UAH).Dr. Wang received MS and PhD degrees in Aerospace Engineering from the University of Maryland, College Park, in 1998 and 2001, respectively, and BS and MS degrees in Engineering Mechanics from Dalian University of Technology, Dalian, China in 1993 and 1996, respectively.  His areas of research include structural dynamics, adaptive structures, rotorcraft, and structural health monitoring. He has authored more than 50 archival journaland conferencepapersand awarded 3 US patents.

He is currently anAssociate Fellow of the American Institute of Aeronautics and Astronautics (AIAA)and a member of the American Society of Mechanical Engineers (ASME) and the American Helicopter Society (AHS).

主办：工业装备结构分析国家重点实验室，运载工程与力学学部工程力学系