长沙理工大学学报(自然科学版)
長沙理工大學學報(自然科學版)
장사리공대학학보(자연과학판)
Journal of Changsha University of Science and Technology(Natural Science)
2014年
1期
37-41
,共5页
管德清%荣政%汤博文
管德清%榮政%湯博文
관덕청%영정%탕박문
小波分析%神经网络%损伤识别%转角模态%框架结构
小波分析%神經網絡%損傷識彆%轉角模態%框架結構
소파분석%신경망락%손상식별%전각모태%광가결구
wavelet analysis%neural network%damage identification%rotation modal%frame structure
以含损伤的框架结构为研究对象,对损伤位置和损伤程度进行识别。运用有限元分析原理,采用Lanczos法得到框架结构的转角模态,对其转角模态进行连续小波变换可以得到结构的小波系数,再由小波系数模极大值确定损伤的位置。以损伤后结构的固有频率作为神经网络输入参数构造神经网络,从而实现对框架结构损伤程度的识别。通过对一平面框架结构的损伤识别计算分析,验证了方法的有效性。
以含損傷的框架結構為研究對象,對損傷位置和損傷程度進行識彆。運用有限元分析原理,採用Lanczos法得到框架結構的轉角模態,對其轉角模態進行連續小波變換可以得到結構的小波繫數,再由小波繫數模極大值確定損傷的位置。以損傷後結構的固有頻率作為神經網絡輸入參數構造神經網絡,從而實現對框架結構損傷程度的識彆。通過對一平麵框架結構的損傷識彆計算分析,驗證瞭方法的有效性。
이함손상적광가결구위연구대상,대손상위치화손상정도진행식별。운용유한원분석원리,채용Lanczos법득도광가결구적전각모태,대기전각모태진행련속소파변환가이득도결구적소파계수,재유소파계수모겁대치학정손상적위치。이손상후결구적고유빈솔작위신경망락수입삼수구조신경망락,종이실현대광가결구손상정도적식별。통과대일평면광가결구적손상식별계산분석,험증료방법적유효성。
The frame structure with damages is taken as the research obj ect in order to have a clear identification of the damage location and damage degree.Based on the principle of FEA and the Lanczos method,the modal parameters of frame structure can be calculated. And with a continuous wavelet transform of the modal parameters according to the rotation modal wavelet analysis theory,the wavelet coefficient can be got.The damaged construction can be located by the maximum modulus of wavelet coefficients.The neural network can be formed with neural network input parameter as its natural frequency of the structure.So the identification and positioning of structural damage can be made.The method is verified use-ful by computational analysis of the frame structure damage.