摘要
针对某燃气轮机动力涡轮工作叶片及轮盘,建立了耦合场及接触有限元模型。选取该装置典型启动过程作为计算载荷,并综合考虑了涡轮盘-片工作时承受的离心负荷、气流力、热负荷,进行热弹塑性有限元分析。根据分析结果,采用应变场强法对盘片危险部位进行了高温低循环疲劳/蠕变寿命预测。结果表明,有限元分析能比较全面精确地反映装置实际情况,因而寿命计算确保了预测的正确性和可信度。
Coupling field and contact finite element model were built up for gas power turbine＇s working blade and wheel disc, with which a thermo-elastic-plastic finite element analysis was performed for typical start-up process of the turbine disc-blade, comprehensively considering the centrifugal force, gas flow force and thermal load bore by the disc-blade. Based on analysis result, high-temperature low cycle fatigue/creep life estimation was carried out for dangerous areas of the disc-blade by strain field method. Results show that finite element analysis can precisely reflect the actual condition of the device, which guarantees the correctness and reliability of the life estimation.
出处
《发电设备》
2009年第2期77-81,共5页
Power Equipment
基金
武器装备预研基金项目资助(9140A27050106JB11)
关键词
燃气轮机
涡轮盘-片
应变场强法
寿命预测
gas turbine
turbine disc-blade
stress-strain field intensity method
life estimation
