液压升降坝工作原理及结构性态分析

液压升降坝是一种新型的可升降活动的坝型,目前尚无设计规范。介绍了液压升降坝的结构、原理及特点,根据液压升降坝的结构特点和实际运行工作条件,采用弹性力学三维有限元法建立了三维有限元模型,计算分析了不同工况下升降面板及支承结构的应力和变形,并研究了其工作性态。结果表明,液压升降坝面板与坝后液压杆、支撑杆交接处几何形态发生突变,易产生应力集中,需设置合适的连接过渡装置以减小应力集中。

Structural Performance and Operating Principle Analysis of Hydraulic Lifting Dam

Hydraulic lifting dam is a new type of dam which has lifting activities, and there is no design specification at present. This paper firstly introduces the structure, principle and characteristics of hydraulic lifting dam. Then, according to the structure characteristics and actual working conditions, a three-dimensional finite element model of hydraulic lifting dam is established. The deformation and stress of face slab and supporting structure under different operating conditions is calculated. It also evaluates the safety of the dam structure by studying its working performance. The results show that it has large geometric distortion in the junction between face slab and hydraulic rod or support bar, which can produce stress concentration easily. Therefore, it is necessary to set appropriate connection transition device to reduce the stress concentration.