Efficient procedures of sensitivity analysis for structural vibration systems with repeated frequenc

• 作 者: ShijiaZhao;TaoXu;WeiZhang;
• 机 构: College of Mechanical Science and Engineering,Jilin University,Changchun 130022,People's Republic o
• 出 处: 首届全国空间结构博士生学术论坛
• 发表日期: 2012年期

　　Derivatives of eigenvectors with respect to structural parameters play an important role in structural design,identification,and optimization.This paper considers the calculation of eigenvector sensitivity when the eigenvalues are repeated.A relaxation factor embedded in the combined approximations method makes it effective to the structural response at various modified designs.The proposed method is feasible after overcoming the difficulties of irreversible condition.The numerical example shows that it is easy and efficient to implement this method for the general linear vibration damped systems with repeated frequencies.