Dynamic response analysis method for nonlinear multi-degree-of-freedom system

摘要

Provided is a dynamic response analysis method for a nonlinear multi-degree-of-freedom system with relatively low computational cost and relatively high analysis accuracy. Ignores the interaction between modes in the plastic region, assumes a mode superposition rule for mode superposition, and then expands the mode of the nonlinear multi-degree-of-freedom system by the natural vibration mode of the elastic region, and forms a non-linear one-degree-of-freedom system The maximum deformation of each mode is grasped by using the modal plastic modulus obtained from the constant plastic modulus response spectrum created by the time history response analysis.