摘要
利用有限元软件Ansys二次开发语言apdl进行二次开发,将多次透射边界(MTF边界)和弹阻边界(V-S边界)添加到软件中,从而实现对土-结构动力相互作用问题中无限域场地的模拟。以野外大比例(1/2)土-箱基-框架结构试验模型的牵引释放自由振动试验(波源问题)和爆破震动试验(散射问题)数据为基础,通过有限元数值计算结果和试验结果的对比可知,施加了人工边界的土体模型可以较好地模拟波在无限域土体中的传播,有效地减少有限元计算模拟时的计算规模。同时多次透射边界在计算精度以及散射问题中地震波输入的便捷性方面要优于弹阻边界。
Via programming in APDL provided by ANSYS, multi-transmitting boundary and viscous-spring boundary were added to ANSYS to simulate the infinite media. Based on the field large-scale （ 1 ： 2） model of soil-box foundation-structure dynamic interaction system under the release test （the wave source problem） and explosion test （the scattering problem）, comparison of the test results and the FEM results indicates that the soil FEM model with arti- ficial boundary is good to simulate the infinite media and reduce the total FEM computation time. Comparing with viscous-spring boundary, the precision of multi-transmitting boundary is relatively high and more convenient for the seismic wave input in the scattering problem.
出处
《地震工程与工程振动》
CSCD
北大核心
2007年第3期137-143,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(50278033
50578062)
关键词
土-结构动力相互作用
自由振动试验
爆破震动试验
多次透射边界
弹阻边界
soil-structure dynamic interaction
free vibration test
explosion test
multi-transmitting boundary
viscous-spring boundary
