动载荷反分析的精细积分法  

Back analysis of dynamic load using precise integration method

作　　者：祝承义[1] 齐念 

机构地区：[1]二滩水电开发有限责任公司两河口建设管理局,四川成都610051 [2]中国联合工程公司工程建设中心,浙江杭州310022

出　　处：《人民长江》2010年第2期77-79,96,共4页Yangtze River

摘　　要：动荷载的辨识问题研究在结构动力分析和应用中具有重要意义。根据精细积分法的基本原理,假定外荷载在离散时间步长内按线性变化,给出了一种动荷载识别的时域方法。数值算例计算结果表明,该方法不仅适用于稳态周期性荷载的识别,对于随机荷载识别精度也很高,同时,其形式简洁明了、应用方便,特别适宜于计算机求解,具有一定的理论意义和实用价值。The dynamic load identification is important in structural dynamic analysis and application. Based on the principle of precise integration method and assumption of linear dynamic load variation in discrete time - step, an identification method of dynamic load is presented. The results of numerical simulation examples show that the presented method is fit for steady - state periodic load identification and random load identification. Moreover, the method is simple in form, convenient to application, which is favorable in computation, and has theoritical and practical significance to some extent.

关 键 词：动荷载 识别 精细积分 反分析 

分 类 号：O313[理学—一般力学与力学基础] TU311.3[理学—力学]