三角门底枢的非线性接触有限元分析

底枢的疲劳破坏和磨损是船闸闸门经常维修的主要原因之一,底枢在设计过程中进行了非线性接触分析,检验其结构强度并针对结构设计提出改进措施。以滁河汊河集船闸下游三角门为研究对象,详细介绍了Workbench对底枢非线性接触有限元分析的思路和方法,对比分析底枢在正反向水压力作用下的变形和接触应力情况。结果表明:底枢整体结构满足规范要求;底枢接触面在反向水压力作用下更易失效;局部应力集中部位需要设置圆弧倒角或过渡圆角,避免结构上产生较大的尺寸突变部位。该研究为底枢结构设计提供参考依据。

Nonlinear contact finite element analysis on bottom pintle of sector gate

Fatigue fracture and wear of bottom pintle are the primary causes of ship lock gates'' maintenance. During the structural design of bottom pintle, nonlinear contact analysis on bottom pintle should be carried out to examine its strength and to propose improvement measures of structure design. Taking the downstream sector gate of ship lock at the Chahe River for an example, the methods of nonlinear contact finite element analysis on bottom pintle by using the software Workbench were introduced in detail in this study. The deformation and contact stress of bottom pintle under the action of front and back hydraulic pressure were comparatively analyzed. The results showed that, the whole structure of bottom pintle met the standard requirements, the contact surfaces of bottom pintle under back hydraulic pressure were more likely to lose efficacy; circular chamfering or rounded corners should be set at local stress concentration areas to avoid great abrupt changes of dimension in structure. This study provides an important reference for structural design of bottom pintle.