循环载荷作用下结构的热应力棘轮和低周疲劳分析  

Thermal Stress Ratchet and Low Cycle Fatigue Analysis of Structures Under Cyclic Load

作　　者：左安达 周强 姜凤银 Zuo Anda;Zhou Qiang;Jiang Fengyin(Wison Engineering Ltd.,Shanghai 201210,China;Southwest Institute of Chemical Co.,Ltd.,Chengdu,Sichuan 610225,China;Branch of Wison Engineering Ltd.,Zhengzhou,Henan 450018,China)

机构地区：[1]惠生工程(中国)有限公司,上海201210 [2]西南化工研究设计院有限公司,四川成都610225 [3]惠生工程(中国)有限公司郑州分公司,河南郑州450018

出　　处：《化工与医药工程》2025年第2期48-54,共7页Chemical and Pharmaceutical Engineering

摘　　要：文章中的反应器局部结构存在着过大的温差,会导致产生很大的热应力,通过设置隔热耐磨衬里、陶瓷纤维毡/纸来减少热量的传递,达到降低温差及热应力的作用。另外,通过有限元法对该局部结构进行温度场和热-机械耦合分析,基于失效模式的设计理念,对其在压力作用下可能会发生的塑性垮塌失效,在压力-温度循环载荷作用下超过安定状态可能会发生的热应力棘轮失效以及低周疲劳失效模式均进行了详细的分析和评定,以确保该结构在使用过程中的安全性。可为压力容器类似设计条件和结构的工程设计提供一定的参考意义。There is a large temperature difference in the local structure of the reactor in this paper,which will result in a large thermal stress.Heat transfer can be reduced by setting insulation and refractory lining and ceramic fiber blanket/paper to reduce the temperature difference and thermal stress.In addition,the temperature field and thermal-mechanical coupling analysis of the local structure were carried out by finite element method.Based on the design concept of failure mode,the plastic collapse failure that may occur under pressure,the thermal stress ratchet failure and the low cycle fatigue failure that may occur when beyond the stability state under pressure-temperature cyclic loading were analyzed and evaluated in detail to ensure the safety of the structure in operation.Also,it can provide some reference for the engineering design under similar design conditions and structures of pressure vessels.

关 键 词：循环载荷 塑性垮塌 热应力棘轮 低周疲劳 压力容器 

分 类 号：TH49[机械工程—机械制造及自动化]