基于应变模态的直接损伤定位法

英文篇名：Damage Identification Based on Strain Modal for Damage Structure
中文刊名：贵州大学学报(自然科学版)
英文刊名：Journal of Guizhou University(Natural Sciences)
作者：范涛 ; 曾春平 ; 马琨
英文作者：FAN Tao ; ZENG Chun-ping ; MA Kun ; College of Science ; Kunming University of Science and Technology
中文关键词：应变模态 ; 简支梁 ; ANSYS
英文关键词：the strain modal ; simply supported beam ; ANSYS
出版日期：2015-02-15
机构：昆明理工大学理学院;
年：2015
期：01
出版单位：贵州大学学报(自然科学版)

摘要

通常结构的位移模态和固有频率难以有效的反映结构是否损伤和损伤状况,应变模态能够更有效,更可靠的对结构损伤识别和定位。本文通过ANSYS对梁结构的不同损伤程度和不同的位置损伤工况的模拟仿真,进行结构损伤分析研究,最后通过前三阶应变模态振型结构损伤前后的比较,总结损伤结构的应变模态的变化规律,揭示应变模态对结构损伤的敏感性。
Usually the structure of the displacement modal and natural frequency is difficult to effectively reflect the damage condition of the structure damage and,strain modal can be more effective,more reliable to identify and locate structure damage. In this paper,simulation beam damage location and damage degree with ANSYS of the structural damage identification were researched,through structural damage before and after the strain modal vibration mode comparison,the strain modal of the structural damage diagnosis rule was revealed,and the strain modal of the sensitivity of the scathe of the bridge was revealed.

引文

[1]韩红飞,周邵萍.基于应变模态差的管道损伤识别仿真[J].振动、测试与诊断,2013,33(1):2-3.
    [2]Pandey A K,Biswas M,Samman M M.Damage detection from changes in curvature mode shapes[J].Journal of sound and vibration,1991,145(2):311-323.
    [3]赵才友,王平.基于应变模态变化率的钢轨损伤检测[J].振动、测试与诊断,2012,32(5):3-4.
    [4]邓焱.严普强梁及桥梁应变模态与损伤测量的新方法[J].清华大学学报,2000,40(11):2-4.
    [5]顾培英.用应变模态技术诊断梁结构的损伤[J].地震工程与工程振动,2005,25(4):48-53.
    [6]杜永峰,张冬兵.曲率模态和神经网络在损伤识别中的应用[J].公路交通科技,2007,24(11):74-80.