A hybrid expansion method for frequency response functions of non-proportionally damped systems
This study considers non-proportionally viscously damped systems. Frequency response functions are computed using complex modal superposition method. A general relationship satisfied by eigensolutions and system matrices is established. An explicit expression on the contribution of the higher-order modes is presented. A correction method to non-proportionally viscously damped systems is presented.
modal truncation error viscous damping frf neumann expansion modal analysis mode superposition method