Analysis of Vibration Isolation for Gibson Ground Using WIB
The project on the isolation of man-made vibration is becoming a special concern in the civil and environmental engineering field. The system of wave impedance block (WIB) , which is one of the effective countermeasures to isolate the ground vibration ,has been gradually applied to the en -gineering practice. In this paper,the efficiency of vibration isolation for Gibson ground by WIB in a three-dimensional (3D) context is studied. The analysis is accomplished with the aid of a 3D semi— analytical boundary element method (BEM) based on thin4ayered method (TLM) , on which the Greens function is regarded as fundamental solution of a stratified half-space. Then the active isolation effectiveness by WIB is studied in elastic half-space. The paper in detail studied relevant parameters in the design of 3D WIB isolation in Gibson elastic half-space. The results indicated that increasing the thickness and modulus of WIB is the two most effective ways to get a good effect of isolation. And the Gibson grounds properties have some influence on the effect of isolation. Moreover , increasing the diameter of WIB can obviously diminish the amplitude of ground vibration around the WIB,while the effect of WIB on outside ones is more complex.
Guangyun GAO Bo ZHANG Wei LI
Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education ,Tongji Universi Shanghai Shenyuan Geotechnical Engineering Co .,Ltd., Shanghai 200011
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
784-792
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）