计算力学学报2017，Vol.34Issue(5)：631-637,7.DOI:10.7511/jslx201705015
基于二阶系统解耦的精细积分格式下动载荷时域识别
Dynamic load identification in second-order formulation in time domain based precise time-integration
摘要
Abstract
The way of load identification based on modal analysis transforms the system equation into a decoupled form by modal matrix ,but this is only applicable to problems with proportional damping .In this paper a load identification method in time domain is established based on the decoupled second-order formulation .Firstly ,the decoupled form of system equations is obtained in Lancaster structure by theoretical derivation ;then ,with the assumption that the load is a step function ,the load identification formulas are derived by the precise time-integration method ;finally ,the time history of a structural load is obtained by systematic real-time response .The numerical experiments verify that the new method not only has a higher accuracy than the modal analysis method for systems with proportional damping ,but also is efficient for systems with non-proportional damping .关键词
Lancaster结构/二阶系统解耦/载荷识别/精细积分/阶跃力/模态分析Key words
Lancaster structure/decoupled second-order formulation/load identification/precise time-integration method/step load/modal analysis分类
数理科学引用本文复制引用
王淑娟,韩伟民,王国巧,沈继红,姜楠..基于二阶系统解耦的精细积分格式下动载荷时域识别[J].计算力学学报,2017,34(5):631-637,7.基金项目
国家自然科学基金(11226324 ) （11226324 ）
黑龙江省基金(A201407 ) （A201407 ）
哈尔滨工程大学研究生培养基金(00211001060924 )资助项目 . （00211001060924 ）
