基于应变指标的微弱损伤识别的实验方法  

Experimental Methods for Weak Damage Identification Based on the Principle of Strain Index

作　　者：韩杰[1,2] 王锋[3] 

机构地区：[1]太原理工大学机械电子研究所,山西太原030024 [2]新型传感器与智能控制教育部重点实验室,山西太原030024 [3]中国重型汽车集团有限公司,山东济南250000

出　　处：《机电工程技术》2012年第6期38-40,108,共4页Mechanical & Electrical Engineering Technology

基　　金：山西省科技攻关项目资助(编号:2010 032 2014)

摘　　要：针对位移指标对微弱损伤不敏感的特点,研究了基于应变模态的损伤识别方法。该指标从应变模态参数识别着手,获得低阶应变模态振型,构造应变模态差,达到了结构微弱损伤的识别目的。通过与位移指标对比,实验表明该指标能通过应变模态振型和应变模态差准确识别微弱损伤的位置和损伤的程度。Based on the fact that a displacement index is not sensitive to weak damage, a damage identification method based on strain mode is studied. This index starts with strain modal parameter identification then low order strain modal shapes and strain mode difference between different modal shapes are obtained to identify weak damage of structure. Through comparing with the displacement index, the experiment shows that this strain index can accurately identify the position and extent of the weak damage via strain modal shape and strain mode difference.

关 键 词：应变模态 位移模态 损伤识别 

分 类 号：TH17[机械工程—机械制造及自动化]