热-机循环载荷作用下裙座结构的棘轮和疲劳评定  

Ratcheting and Fatigue Assessment of Skirt Structure Subjected to Cyclic Thermal-Mechanical Loading

作　　者：石乾宇 唐卉[1] 陈建龙[1] 李琪[1] 王志坚[1] 

机构地区：[1]哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨150046

出　　处：《压力容器》2017年第1期45-49,共5页Pressure Vessel Technology

摘　　要：基于给定的热-机循环载荷,对裙座结构进行了热应力分析。采用弹性核判据和弹-塑性应力分析对结构进行了棘轮评定,采用最大-最小循环计数法和弹性应力分析对结构进行了疲劳评定。为裙座结构防止复杂循环载荷引起的失效提供一定参考。The thermal stress of skirt structure was analyzed based on cyclic thermal-mechanical loading. The ratcheting failure was assessed through elastic core criteria and elastic-plastic stress analysis, the fa- tigue failure was assessed through max-min cycle counting method and elastic stress analysis. It can pro- vide reference for the protection of skirt structure against complex cyclic loading

关 键 词：循环载荷 热应力 裙座 棘轮 弹性核 疲劳 最大-最小循环计数法 

分 类 号：TH49[机械工程—机械制造及自动化] O344.1[理学—固体力学]