任意载荷激励下直角三角形板单元局部动力效应  

Local dynamic effect modification of right-angled triangle plate element under arbitrary excitation

作　　者：刘大全[1] 杨春秋[1] 曲乃泗[1] 曲牧[1] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,辽宁大连116023

出　　处：《地震工程与工程振动》2003年第1期59-63,共5页Earthquake Engineering and Engineering Dynamics

基　　金：山东省自然科学基金资助课题(Y2000F01)

摘　　要：本文推导了在任意载荷激励下直角三角形板单元局部动力效应修正公式。采用单边积分法,对单元边上的单位宽度上的内力进行局部动力修正,代替以往的用加密网格提高精度的方法。计算结果表明,局部动力效应影响不可忽略,本文方法可使计算结果更为精确。这对分析大型复杂结构环境载荷激励下的局部动力效应具有参考价值。In this paper, the local dynamic effect modification formulation of rightangled triangle plate element under arbitrary excitation is presented. An efficient integral for onedimensional method is used to improve the interior force per unit length along each element side direction, instead of the original solution by subdividing the domain to ensure the accuracy. By analyzing the dynamic responses of structures, it is found that more accurate results are obtained when local dynamic effect is considered. This conclusion can be used in dynamic analysis of largescale complicated structures under environmental excitation.

关 键 词：板单元 局部动力效应 单边积分法 地震作用 惯性力 荷载 

分 类 号：P315.9[天文地球—地震学] TU352[天文地球—固体地球物理学]