Dynamic Analysis of a Structure with Coulomb Friction Shen Zuwu Wang Tianyun Ren Huiqi Liu ShuijiangA modal superposition method for the dynamic analysis of a structure with coulomb friction is presented. The finite element method is used to derive the equation of motion, and the nonlinearities due to friction are represented by a pseudo-force vector. A structure standing freely on the ground may slide during a seismic event. The relative displacement response may be divided into two parts: elastic deformation and rigid body motion. The presence of rigid body motion necessitates the inclusion of the higher modes in the transient analysis. In a problem, the dynamic response of a platform standing freely on the ground is analyzed during a seismic event.modal superposition method; coulomb friction; dynamic analysis; nuclear power station