基于ABAQUS的风力机塔筒螺栓连接接触非线性分析

ABAQUS是先进的大型通用非线性有限元分析软件,求解非线性问题时具有非常明显的优势。采用ABAQUS软件对风力机塔筒高强度螺栓连接进行了接触非线性分析,模拟了螺栓连接在预拉力以及加载极限载荷后两种工况下的静力学性能,得到了螺栓与法兰等结构的等效应力云图与位移云图。计算结果表明:塔筒螺栓连接结构的应力主要受预紧力影响。加载极限载荷后,螺栓最大应力增大17%,最大位移增大约两倍。结果证明塔筒底部螺栓连接的强度与刚度满足设计要求,为风力机组的结构设计提供了理论依据。

Contact nonlinear analysis of wind turbine tower bolted joints with ABAQUS

ABAQUS is the advanced general nonlinear finite element analysis software, which has very obvious advantage in solving nonlinear problem. The contact nonlinear analysis of high duty bolted joints was conducted about the tower of wind turbine with ABAQUS. Statics performance was simulated in the conditions of pretightening and ultimate load. The Von-Mises stress and the displacement contour images were acquired for the structure of flange and bolts. The calculation results show that bolted joints' stress of tower is mainly influenced by the preloaded force. The maximum stress of bolts increases 17% by the action of ultimate load, and the maximum displacement increases approximately two times. The results prove that the strength and stiffness of tower bolted joints meet the design requirements. The analysis provides theoretical basis for designing of wind turbine.