弧形闸门L型水封压缩过程非线性数值模拟

Nonlinear numerical simulation on compression deformation process of L-type water seal of radial gate

本文分析弧形闸门L型水封预压缩特点,应用超弹性橡胶材料Mooney-Rivlin两参数模型建立该水封压缩过程的数值分析模型,在模型中采用接触单元模拟水封与止水座间接触,通过止水座的相对位移来控制水封的预压缩量。数值模拟结果表明,在预压缩过程中,L型水封与止水座间接触中心位置和接触范围逐渐从水封接触边顶部向其根部移动,而且水封顶部脱离止水座。施加了水压后,水封完全与止水座接触。进一步分析水封与止水座接触力变化过程可以看出,在水封预压缩及施加水压全过程中,接触力主要来源于水压,由预压缩产生的接触力比较小,也就是说,L型水封的启闭摩阻力主要是水压产生的。

The characteristics of pre-compression of L-type water seal of radial gate is analyzed, and the nonlinear numerical simulation model of compression process of L-type water seal is developed by using Mooney-Rivlin hyper- elastic rubber material model with two parameters in this paper. The interface elements are utilized for analogue of actual interface fractures between water seal and steel seat. The relative displacement value of steel seat is presented for analogue of pre-compression displacement value of L-type seal. The results show that the interface center is shafted from the top to bottom of water seal interface edge during process of compression. The range of interface is enlarged also. But the seal is gradually separated from steel seat at the top of interface edge. After subjected on water pressure, the top of interface edge of water seal is pushed to steel seat again. The change process of intact force between water seal and seat indicates that the intact force is produced mainly from water pressure. The interface force from pre-compression is smaller. The friction resistance of L-type water seal is mainly produced by water pressure.