以某高水头水轮机球阀压力试验封头结构为研究对象,介绍了球壳与锥壳组焊式压力试验封头的各组成部分,并利用有限元方法对其进行受力分析。利用应力线性化方法,提取了高应力区域组焊钢板的最大平均应力,并依据相应的应力考核标准对结果进行考核。 Taking a high-head turbine ball valve pressure test head structure as the research object, the components of the ball-head and cone shell weld-pressure test head were introduced, and the force analysis was carried out by finite element method. The stress-linearization method was used to extract the maximum average stress of the welded steel plate in the high-stress area and evaluate the results according to the corresponding stress assessment standard.