基于模态参数和支持向量机的桁架结构损伤识别研究  

THE TRUSS STRUCTURE DAMAGE IDENTIFICATION RESEARCH BASED ON THE MODAL PARAMETERS AND SUPPORT VECTOR MACHINE

作　　者：夏敬婵[1] 段敬民[1] 赵洪波[1] 俞晓勋[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454003

出　　处：《工业建筑》2011年第7期16-20,37,共6页Industrial Construction

摘　　要：以桁架结构的损伤为研究对象,根据桁架结构的杆单元应变特点,建立了损伤前后振型曲率变化率和应变模态变化率对杆单元损伤的敏感性分析。同时以该变化率作为输入特征参数构造支持向量机,对杆单元的损伤进行识别,均取得了较为理想的结果。Taking the truss structure damage as object of study,based on the unit strain characteristics of truss structure,it is done the sensitive analysis of the curvature mode rate and strain modal rate relating to the stem unit damage.Meanwhile the change rate is taken as input characteristic parameters to build support vector machine and identify the unit damage of the stem,with which a more ideal result has been obtained.

关 键 词：桁架结构 振型曲率 应变模态 损伤识别 支持向量机 

分 类 号：TU323.4[建筑科学—结构工程] TU312.3