CAJ | 학술논문

加氢反应器在服役过程中会受到高温高压和循环载荷的共同作用，设计时必须同时考虑蠕变和疲劳的影响。ASME规范案例2605提供一种针对2.25Cr1MoV钢的蠕变疲劳寿命设计方法。借助有限元分析软件ANSYS，采用案例2605中的方法对加氢反应设备圆柱筒体直接管结构进行蠕变疲劳寿命校核，详细阐述该案例的设计思想和具体步骤，并讨论操作温度和压力对于设计寿命的影响。结果表明，接管结构蠕变疲劳寿命校核满足要求，筒体与直接管连接处出现应力集中，由于蠕变应变的产生，应力集中处的应力值随蠕变时间的增加不断下降，蠕变损伤累积速度也随之下降。同时，提高操作温度和操作压力均会造成蠕变损伤的增加，疲劳应力幅对蠕变疲劳的寿命影响较大。针对模拟结果，提出一些提高结构蠕变疲劳寿命的措施。
가경반응기재복역과정중회수도고온고압화순배재하적공동작용，설계시필수동시고필연변화피로적영향。ASME규범안례2605제공일충침대2.25Cr1MoV강적연변피로수명설계방법。차조유한원분석연건ANSYS，채용안례2605중적방법대가경반응설비원주통체직접관결구진행연변피로수명교핵，상세천술해안례적설계사상화구체보취，병토론조작온도화압력대우설계수명적영향。결과표명，접관결구연변피로수명교핵만족요구，통체여직접관련접처출현응력집중，유우연변응변적산생，응력집중처적응력치수연변시간적증가불단하강，연변손상루적속도야수지하강。동시，제고조작온도화조작압력균회조성연변손상적증가，피로응력폭대연변피로적수명영향교대。침대모의결과，제출일사제고결구연변피로수명적조시。
Hydrogenation reactor suffers from a combination of high temperature, high pressure and cyclic load in the process of service, and the effects of creep and fatigue must be taken into account in design. ASME code case 2605 provides a creep fatigue life design method for hydrogenation equipment made of 2.25Cr1MoV steel. With the aid of finite element analysis software ANSYS, a design example of the joint of cylinder and nozzle is introduced to elaborate the design idea and method of the case, and the effects of operating temperature and pressure on the design life are discussed. The results show that creep fatigue damage evaluation meets the safety requirements, and the joint of cylinder and nozzle appears stress concentration. Due to creep strain, the stress value and the rate of creep damage accumulation decrease with the increase of creep time. At the same time, the creep damage increases with the increase of operating temperature and pressure. In addition, the fatigue stress amplitude has greater influence on the life of structure. According to the results, some improvements on creep fatigue life of structure are proposed.