计算结构动力响应的分段精细时程积分方法  

Subsection precise integration method for dynamic response of s tructure

作　　者：王超[1] 李红云[1] 刘正兴[1] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200030

出　　处：《计算力学学报》2003年第2期175-178,203,共5页Chinese Journal of Computational Mechanics

基　　金：船舶工业国防科技应用基础研究基金(99J414.4);国家自然科学基金(10132010)资助项目.

摘　　要：利用钟万勰等发展的精细时程积分方法,提出了解线性定常结构动力系统响应的分段精细时程积分方法。它能适用于各种激励作用下系统的动力响应。对于载荷项采用线性和两次多项式进行拟合,采用精细时程积分方法和叠代方法对动力响应进行计算。与传统的离散积分方法如纽马克方法和威尔逊方法等及状态方程直接积分方法进行数值比较,本方法具有很高的精度和计算效率。Based on the precise integration method, a subsection precise integration method was developed to calculate the dynamic response of linear timeinvarian t structures. It can be used in various kinds of systems excited by external forces. Using the linear or quadratic polynomials to approximate the loading item, the dynamic response was computed via the precise integration method and iteration method. Compared with other traditional methods, such as Newmark and Wilson methods or direct integration of the state equation, the proposed method gives more accurate results, and has higher computation efficiency.

关 键 词：状态方程 动力响应 时程积分法 

分 类 号：O332[理学—一般力学与力学基础]