索网结构找形平衡形态弹性化与零应力态分析

提出了索网分析全过程的6个状态：初始几何态、找形平衡态、弹性平衡态、零应力态、预应力态、荷载态，5个分析过程：找形分析、弹性化分析、预应力分析、逆分析、荷载分析，阐述了各状态参数，论述了各分析过程数学模型.结果表明：索网理想零应力态一般不存在，在结构分析中可采用近似假设零应力态；根据弹性平衡态，采用逆分析法可得到合理近似零应力态.另外，介绍了ANSYS/EASY软件索网分析过程和方法，比较了两者零应力态的数学模型.最后，通过2个索网算例，验证了不同零应力态在预应力分析后的平衡预应力态的较大差异.

Elastified Procedure for the Form-found Equilibrium State and Zero-stress State of Cable-net Structure

Six states and five analysis processes were pointed out for the whole numerical analysis process of cable-net structure.The six states are initial geometry state,form-found equilibrium state,elastified form-found equilibrium state,zero-stress(unstressed) state,pre-stress state and loading state,respectively.The five analysis process are form-finding analysis,elastified cable analysis,pre-stress analysis,inverse analysis and loading analysis.And the state parameters were clarified,also for the analytical mod...