张力结构形态确定的改进方法

为了寻求一种广泛适用于张力结构形态确定的技术，综合膜结构支座位移提升法和近似曲面逼近法的优点，基于传统的非线性有限元求解技术，对张力结构形态确定的有限元方法作了技术上的改进，探讨了加强非线性求解收敛性的几个关键问题，提出了一种实用的张力结构形态确定改进方法，即利用小弹性模量技术得到近似曲面，然后基于近似曲面代入真实结构参数迭代求解最终平衡曲面。研究表明，该方法能广泛适应于张力结构形态确定，同时对张力结构形态确定是建立正确计算模型的前提。

An improved form-finding method for tensile structures

Based on FEM, an improved form-finding method deriving from boundary displacement method and approximative surface-approaching method is put forward which can be used to analyze the initial form-finding of cable structures, membrane structures and tensile beam structures to seek a method which can be applicable for tensile structures widely. Some key problems are discussed concerning non-convergence in nonlinear solution process. Some calculation examples and projects in practice demonstrate that the method can be applicable and correct mechanics model must be established by form-finding in tensile structures.