基于Mooney-Rivlin模型的高水头伸缩式水封非线性仿真  

Nonlinear Simulation of High Head Expansion Water Seal Based on the Mooney-Rivlin Model

作　　者：胡坚柯 陈吉丰 汪振宁 胡葆文 王珏[2] 郝楠楠 蔡锟 胡梦溪 HU Jian-ke;CHEN Ji-feng;WANG Zhen-ning;HU Bao-wen;WANG Jue;HAO Nan-nan;CAI Kun;HU Meng-xi(Huadong Engineering Corporation,Hangzhou 311122,China;College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213022,Jiangsu Province,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州311122 [2]河海大学机电工程学院,常州213022

出　　处：《中国农村水利水电》2022年第4期215-220,228,共7页China Rural Water and Hydropower

基　　金：中央高校基本科研业务费项目(B210202127)。

摘　　要：为探究背压、库压等参数对伸缩式水封止水性能的影响,建立了高水头伸缩式闸门水封的非线性有限元模型,对橡胶材料在止水过程中的受力性能及变形特性进行了数值仿真。首先,基于最小二乘法原理对橡胶材料单轴拉压及纯剪切的试验数据进行曲线拟合并且确定了Mooney-Rivlin本构模型参数,基于ANSYS软件建立了高水头伸缩式水封的仿真模型,通过APDL语言实现了封头接触状态的判断及侧向库水压力的循环迭代施加;其次,分析了含不同参数数量的Mooney-Rivlin模型对仿真精度的影响,并与模型试验对比验证了仿真的有效性;最后,通过参数分析研究了水封自由外伸量、接触应力、外偏移量在不同工作阶段随水封所受背压、库压以及止水面板与压板之间初始间隙变化的规律。A nonlinear finite element model of high head expansion water seal is established to simulate the mechanical performance and deformation characteristics of the rubber material during the water sealing process. The influence of back pressure,reservoir water pressure and other parameters on sealing performance of the expansion water seal are further investigated. Firstly,the uniaxial tension compression and pure shear test date of rubber material are used to curve fitting and the Mooney-Rivlin model parameters based on the least square method. The APDL programming language in ANSYS is used to determine the contact state of steel head and apply the cyclic loads from lateral water pressure. Secondly,the influence of the Mooney-Rivlin model with different number of parameters on the accuracy of the simulation is analyzed by numerical examples. The validity of the simulation is verified by comparing with the model experiment. Finally,the parametric studies are presented to explore variations of free expansion,contact stress and steel head offset with back pressure,reservoir water pressure and the distance between panel and pressing plate in different working stages.

关 键 词：闸门 伸缩式水封 橡胶本构 超弹性 非线性有限元仿真 

分 类 号：TV34[水利工程—水工结构工程]