Multi-Scale FEM for Steel Structure Adjustable Lifting

• 1、China 22MCC Group Corporation Ltd.

Abstract：This article proposes a method for the lifting and simulation of steel structure movable lifting lugs based on multi-scale finite element method (FEM). This method solves the problem of traditional lifting lug welding being unable to adjust by developing an movable lifting lug construction tool. At the same time, a multi-scale FEM simulation method is proposed to effectively solve the calculation error problem caused by unreasonable boundary condition settings in the finite element verification of traditional lifting schemes. The construction tool for movable lifting ears includes the main unit of the lifting ear plate and the horizontal movable support plate, which are fixed to the steel components through mechanical connection without welding and can be reused. The multi-scale FEM simulation method couples the overall rod system model with the local solid model to achieve collaborative calculations at both macro and micro scales, improving the accuracy and efficiency of lifting scheme calculations. The implementation case shows that this method can effectively ensure lifting safety, and the calculation results are consistent with the actual working conditions.

Keywords： Steel structure Lifting and hoisting Multi scale finite element method