高水头船闸阀门顶止水安装变形试验与数值模拟

针对高水头船闸反弧门顶止水安装变形的问题,采用止水切片试验和数值模拟相结合的方法,研究半圆头型止水在不同安装荷载作用下的变形轮廓、位移变形、头部凸起和接触宽度等安装变形规律及等效应力分布规律.结果表明,基于力学试验获得原型材料参数和接触力学计算理论,止水变形数值模拟结果与1∶1切片试验结果吻合较好;随着安装扭矩增大,止水半圆形头部凸起高度近似线性增大,胸墙处止水接触宽度呈非线性变化趋势;止水头部与压板、座板接触边界位置应力梯度最大,是止水最易发生损坏的部位.

Test and numerical simulation of installation deformation of top seal of high-head ship lock valve

Aiming at the installation deformation of the top seal of reversed tainter valve for high-head ship lock,we apply the method of water stop slice test combining with numerical simulation,and study installation deformation properties of semicircular head top seal,such as the deformation profile,displacement deformation,bulge height and contact width of head,and the distribution law of equivalent stress under different installation loads.The results show that based on prototype material parameters obtained by the mechanical test and theory of contact mechanics calculation,the results of seal deformations obtained by numerical simulation are in good agreement with the results of the scale 1:1 slice test.With the increase of installation torque,the bulge height of the semi-circular head increases approximately linearly,the contact width at the parapet shows a non-linear trend,and the maximum equivalent stress gradient appears at the boundary of seal head contacting with clamp plate and seat plate,which is the most easily damaged part of top seal.