ON SENSITIVITY ANALYSIS OF DISCRETE STRUCTURAL SYSTEM

This paper presents a method for determination of eigenvalue derivativ es and two exact analytical methods for determination of eigenvector d erivatives. The methods are applicable to general viscous damped syste ms. The key step in the methods is that the system matrix is decompose d by QR decomposition. The desired condensed coefficient matrix is not hing but the triangle matrix R of QR decomposition. Hence the determin ation of eigenvector derivatives can be calculated efficiently. A nume rical example is presented to demonstrate the validity of the methods.