考虑材料非线性的悬索桥主索鞍有限元计算方法

Finite Element Calculation Method of the Main Cable Saddle of Suspension Bridge Considering the Non-linear Material

现有悬索桥主索鞍设计标准通常采用线性材料进行有限元分析,这会导致主索鞍局部应力过大,超过屈服极限,计算结果与实际工况并不相符。当应力超过屈服极限后,材料的应力-应变曲线是非线性的,采用线性材料计算不合理。此时采用非线性材料计算,计算结果更接近真实工况。论文运用SolidWorks有限元仿真分析模块Simulation分别按照线性和非线性材料模型对主索鞍结构进行有限元分析,为主索鞍的设计计算提供一种新方法。

The current design for tower saddle of suspension bridge generally adopt linear materials to perform finite element analysis,which will cause the too large local stress of tower saddle,namely,the stress will exceed the yield limit and the calculated results are not consistent wi.th the actual working conditions.The stress-strain curve of material is non-linear after the stress exceeds the yield limit,so it is not reasonable to adopt linear material for calculation.Consequently,the result shall be more close to the real working condition if non-linear material is adopted in the calculation.The Simulation,finite element simulation analysis module of SolidWorks,is adopted in this paper to.perform finite element analysis on the tower saddle structures as per the linear and nonlinear material models respectively,providing a new method for the design and calculation of tower saddle.