上海理工大学学报
上海理工大學學報
상해리공대학학보
2014年
5期
497-501
,共5页
周奎%宁娜娜%林杰
週奎%寧娜娜%林傑
주규%저나나%림걸
结构损伤%频率响应%悬臂工字型钢梁%有限元分析%损伤检测
結構損傷%頻率響應%懸臂工字型鋼樑%有限元分析%損傷檢測
결구손상%빈솔향응%현비공자형강량%유한원분석%손상검측
structural damage%frequency response%cantilever H steel beam%finite element analysis%damage detection
基于结构动力学的基本理论,分析了悬臂工字型钢梁的振动模态特性,推导出结构损伤因子与损伤位置和损伤程度的函数关系。根据结构频率响应,运用频率平方变化比的方法进行结构损伤的初步检测与评估。应用 ANSYS 有限元分析软件对一悬臂工字型钢梁在11种工况下进行模拟计算,采用单元刚度折减来模拟结构损伤,并对工字型钢梁进行模型实验。
基于結構動力學的基本理論,分析瞭懸臂工字型鋼樑的振動模態特性,推導齣結構損傷因子與損傷位置和損傷程度的函數關繫。根據結構頻率響應,運用頻率平方變化比的方法進行結構損傷的初步檢測與評估。應用 ANSYS 有限元分析軟件對一懸臂工字型鋼樑在11種工況下進行模擬計算,採用單元剛度摺減來模擬結構損傷,併對工字型鋼樑進行模型實驗。
기우결구동역학적기본이론,분석료현비공자형강량적진동모태특성,추도출결구손상인자여손상위치화손상정도적함수관계。근거결구빈솔향응,운용빈솔평방변화비적방법진행결구손상적초보검측여평고。응용 ANSYS 유한원분석연건대일현비공자형강량재11충공황하진행모의계산,채용단원강도절감래모의결구손상,병대공자형강량진행모형실험。
The vibration properties of cantilever H steel beam were investigated based on the basic theory of structural dynamics.Structural damage factor was derived as a function of damage location and damage degree.According to the structural frequency response,the frequency square change ratio method was used in preliminary testing and evaluation of structural damage.Finite element analysis software ANSYS was applied to simulate and analyse a cantilever H steel beam under 11 working conditions.In the similation,the element stiffness reduction was adopted to simulate structural damage.Then model tests for the H steel beam were carried out.The calculation and analysis results are of great significance to the damage detection and recognition of cantilever H steel beam structures.