动力分析的混合元子区间法
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摘要
本文应用修改的Hellinger-Reissner动力学混合变分原理和Ri?z法.在时域上划分若干子区间,给出了一种新的动力分析近似方法——混合元子区间法.通过采用三次Hermite插值函数逼近.构造出一种单步时间元计算格式.求解薄板振动问题的算例表明,与现有动力分析方法相比,本文方法不仅可获得工程上适用的动位移,还可获得较高精度的动内力.
Based on the modified Hellinger-Reissner's variational principle and the Ritz method,an approximate method called MESM (Mixed Element Subinterval Method) is presented for dynamic analysis. In this method the time domain given is divided into a number of subintervals. By adoption of an approach by cubic Hermite interpolating function,a single-step time element algorithm is constructed. In comparison with the methods available,MESM gives more accurate dynamic internal forces as well as valuable displacements.
引文
1 丁学成,陈庆文.应用哈密尔顿原理计算动力反应的子区间法.地震工程与工程振动,1987;7(1) :45-51
    2 张汝清,殷学纲,董明.计算结构动力学.重庆大学出版社,1987

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