某低温压力容器失效机理研究  

Study on failure mechanism of a low temperature pressure vessel

作　　者：吴俊哲 杨申音 安刚[1] Wu Junzhe;Yang Shenyin;An Gang(Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《低温工程》2022年第1期62-67,共6页Cryogenics

基　　金：北京京市科学技术委员会科技计划课题《高效复合型换热器研制》(课题编号:Z201100004520030)资助。

摘　　要：针对某液氮预冷设备的结构进行了研究,通过有限元分析得到结构的应力集中位置与最大等效应力,并分析得到其失效原因为底部三通在低温下发生脆性破坏。根据分析结果更换了3 mm壁厚316L材质的三通,并进行了冷冲击试验进行验证,解决了容器失效的问题。The structure of a liquid nitrogen pre-cooling equipment was studied.The location of the stress concentration and the maximum equivalent stress were obtained by finite element analysis(FEA).It is found that the reason for its failure is brittle damage of the bottom tee at low temperatures.In order to solove the container failure,The tee was replaced by one made of 316L with 3 mm thickness according to the analysis results,which device passed the liquid nitrogen cold shock test.

关 键 词：液氮 压力容器 有限元分析 

分 类 号：TB65[一般工业技术—制冷工程] TB663