连续系统动力响应的精细时程分析
首发时间:2012-12-06
摘要:连续系统在随机荷载作用下的动力响应非常复杂,一般很难得到解析解。采用精细时程分析法来计算能较准确得到复杂系统在随机荷载作用下的动力响应。首先阐述了精细时程分析法的原理、方法和Matlab程序实现的步骤。然后用精细时程分析法、理论公式法和abaqus数值模拟法计算单跨简支梁在三角荷载作用下的动力响应,三者的结果基本相似,验证了精细时程分析法的正确性和精确性。最后用此方法计算出15层框架结构楼房在EL-Centro地震波的作用下各层的动力响应。得到此框架结构在地震波作用下各层竖直方向上的位移、速度,为该框架结构是否发生破坏提供了理论依据。
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Precise integration method of dynamic time history analysis of continuous system
Abstract:The dynamic response of the continuous system under random loads is very complex,it's generally difficult to obtain analytical solutions. The fine time history analysis method is used to calculate the dynamic response of the complex system under random loads, first expound it's principle ,methods and steps of calculated by Matlab ,Then calculate the dynamic response of a single span girder under triangular load by using fine time history analysis method, theoretical formula method and abaqus numerical simulation method ,the results of three basic calculations are basicly similar that verify the fine time history analysis method is correct and accuracy. Finally, using this method to calculate the dynamic response of 15 layer frame structure building under the EL-Centro earthquake wave. Get the vertical direction displacement and velocity each layer of this frame structure under seismic wave that provide a theoretical basis whether the frame structure whether will be destroyed.
Keywords: the continuous system random loads the fine time history analysis the dynamic response
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