Sensitivity analysis of dynamic characteristics of derrick steel structures
It is very important to acknowledge the dynamic characteristic sensitivity of derrick steel structures during the processes of design, model modification, damage identification, test sensor arrangement and safety assessment. The sensitivities of the eigenvalues and eigenvectors with design parameters are derived. The numerical method of sensitivity analysis of derrick steel structures is introduced. The sensitivities of frequency and modal displacement to cross-sectional area, Youngs modulus and anti- bending moment of inertia of the column, cross-bar, and diagonal brace of derrick steel structure are analyzed. The features and law of the frequency and modal displacement to main design parameters are obtained. The results show that both frequency and mode shift have a greater sensitivity to design parameters of column and a smaller sensitivity to design parameters of cross-bar and diagonal brace, that the sensitivities of frequency to cross-sectional area and Youngs modulus are relatively large while the sensitivity impact trend is on the opposite, and that modal shapes have a greater sensitivity only to Youngs modulus. The results provide a valuable reference for engineering applications.
derrick steel structures dynamic characteristics sensitivity analysis frequency modal displacement design parameters
Dongying Han Xinjun Yang Xujia Li Zhilei Wang Peiming Shi
College of vehicles and energy Yanshan University Qinhuangdao, Hebei Province, China Key Laboratory of Measurement Technology and Instrument Yanshan University Qinhuangdao, Hebei Provin
国际会议
三峡
英文
3460-3463
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）