CURRICULUM VITAE of DR. Yu-Chiung TENG
Yu-Chiung Teng is a retired senior research scientist and Adjunct Professor of Columbia University. Her research has been in the field of elasto-dynamic wave propagation both analytically and numerically. She earned her doctorate degree from the Aldridge Laboratory of Applied Geophysics, Henry Krumb School of Mines, Columbia University, New York, N.Y. in 1971. Previously, she received her M.A. and B.S. in physics from the State University of New York (SUNY) at Buffalo, N.Y. and National Cheng Kung University, Taiwan, Republic of China, respectively. She was the executive chairperson for the 3rd International Conference on Theoretical and Computational Acoustics (ICTCA), Newark, New Jersey, USA July, 1997. She also co-chaired the 2nd ICTCA in Honolulu, Hawaii, USA, two years earlier in 1995; and subsequently, the 5th in Beijing, 2001; the 6th in Honolulu, Hawaii, 2003 ; the 7th in Hangzhou, China, 2005; and, most recently, the 11th in College Station, Texas, USA, 2014.
After graduation from Columbia University, she had worked at her alma mater and concentrated her research in the area of forward modeling in elastodynamics and poro-elastodynamics. While at Columbia before her retirement, she had been invited as the visiting scholar to Taiwan’s Earthquake Research Center, Institute of Physics, Academia Sinica (1974-1975) and the Institute of Geology and Geophysics, the Chinese Academy of Science, Beijing, China (2000-2001). In addition, from 1987-1990, the Department of Technical Co-operation Development of the United Nations invited her as a consultant for seismological studies at varies academic institutions in China. Currently, she is the visiting professor of the following universities in China: Chang An University, Xian, Shanxi,China; Xian Jiaotong University, Xian, Shanxi,China; and ShanDong University of Science and Technology, Qingdau, Shandong, China.
The Elasto-Dynamic Transient Problem for a Fluid/Solid Coupled Medium
Yu-Chiung Teng ⃰
Retired Senior Research Scientist
Aldridge Laboratory of Applied Geophysics
School of Mines, Columbia University
New York, NY 10027, USA
The purpose of this paper is to emphasize the importance of the physical modeling through the problem of elasto-dynamic wave propagation for a fluid/solid coupled medium. Roever, Vining, and Strick(1959) have experimentally and analytically investigated the problem of wave propagation from an impulsive source along a fluid/solid interface. Their duel attack of the problem certainly led to a better understanding of the solution and the nature of the complexity of the influence of the elasticity on the wave motion in an acoustic/elastic coupled medium. In this study we simulate their problem numerically by means of the finite element method. Two different approaches are used. The first approach is accomplished by modeling the small acoustic disturbance in the fluid medium with pressure type fluid elements and the small elastic deformation in the solid medium by elastic displacements type solid elements. In the second approach, both the fluid and solid medium are modeled by the displacement solid element. In this second approach, an energy-sharing-nodal-point technique is introduced to simulate an omni-directional source for generating the compressional waves in the fluid. And also the double-layer technique is used to remove the unnecessary continuity in tangential displacements at the fluid/solid interface. It is hoped that the experiment with the finite element simulation would not only provide a more detail results in this fluid/solid problem but could also be extended to solving physically realistic problem of more complex fluid/solid interfaced media arising in ocean acoustics.
* Visiting Professor:
Chang An University, Xian, Shanxi, China;
Xian Jiaotong University, Xian, Shanxi,China;
ShanDong University of Science and Technology, Qingdau, Shandong, China