Finite element analysis of complete structure of tower cranes

Abstract

In order to ensure the safety and stability of the tower crane in operation, the static and dynamic characteristics of the QTZ100 tower crane in typical working conditions are analyzed by the finite element method, so as to verify the safety of its use and put forward targeted suggestions for the optimization of cranes. The results show that the equivalent stress is less than the ultimate design stress of the tower crane, and there is stress concentration in the plate connected between the upper turntable and the lifting arm. The frequency of the fully loaded motor is far from the normal operating frequency of the tower. The horizontal root displacement of the lifting arm corresponding to the peak displacement response is relatively large. The buckling factor of the tower crane is higher than the empirical value. Therefore, to meet the strength and stability requirements of the tower crane, the connection between the upper turntable and the lifting arm should be strengthened. The motor will not resonate with the tower crane when it is fully loaded, and the dynamic rigidity is poor when it works at the frequency corresponding to the peak value. The buckling factor is higher, so the stability is better.