悬索桥的几何非线性问题及其有限元分析

首先简述了几何非线性的基本理论,介绍了国内外在几何非线性有限元法方面的研究进展,并分析了其求解的一般过程。最后对一大跨度悬索桥进行施工全过程有限元模拟。结果表明,几何非线性效应对大跨度悬索桥的施工影响显著,在悬索桥的设计分析中必须充分考虑。

Geometric Nonlinearity and the Finite Element Analysis in Design of Suspension Bridge

The basic theorem of geometric nonlinearity is presented.The research progress of geometric nonlinearity finite element method at home and abroad is introduced as well as the general procedure is analyzed. Finally,the finite element simulation is taken for the whole construction process of a long-span suspension bridge.It is indicated that geometric nonlinearity has a remarkable effect on the bridge construction,and it must be taken into consideration in the design and analysis of suspension bridge.