Seismic behavior analysis of bridge type grab ship unloader based on ANSYS
YE Yong wei, LU Jun jie
（College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China）

Abstract: Aiming at dynamic response and seismic performance of bridge type grab ship unloader under earthquake, the method for seismic analysis of structure based on ANSYS was put forward with the research on intensity, strain characteristics, wheel pressure stability and damage mode of ship unloader structure under earthquake. According to the traditional theoretical anti seismic analysis of quayside container crane and architecture, a finite element model of the bridge type grab ship unloader based on ANSYS was established for stability of major damage pattern and wheel pressure with equivalent static analysis in different conditions and seismic excitations. Aiming at dynamic behavior and seismic response of the ship unloader under longitudinal or transverse seismic action, according to the court sorts division and the vibration characteristic of structure, the anti quaking design reacting spectrum of crane and the typical seismic record was used for time history analysis of ship unloader. The experimental data between the equivalent static analysis, response spectrum analysis and time history analysis was compared. The research result indicates that the ship unloader can satisfy the requirement of seismic fortification intensity and ensure the correctness of the design of steel structure. It has certain reference significance to the seismic research field and project application of bridge type grab ship unloader.

Key words: bridge type grab ship unloader; earthquake response; response spectrum method; time history analysis