基于响应面法的涡轮盘低循环疲劳可靠性分析方法  

Reliability Analysis of Low Cycle Fatigue of Turbine Disc Based on Response Surface Method

作　　者：李辉[1] 白广忱[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100083

出　　处：《航空发动机》2008年第1期28-30,6,共4页Aeroengine

摘　　要：针对低循环疲劳破坏模式,结合低循环疲劳寿命分析方法与线性损伤准则,提出了基于响应面法的结构可靠性分析方法。将材料属性、载荷以及材料的低循环疲劳性能参数作为随机因素,采用响应面法进行了可靠性分析;以之对某型航空发动机涡轮盘进行低循环疲劳可靠性分析,并将其与蒙特卡罗法进行了比较。结果表明,该方法计算速度较快,精度较高,对研究实际涡轮盘低循环疲劳的可靠性具有较好的实用性。According to the low cycle fatigue （LCF） damage mode, combining the LCF life analysis method and linear damage guideline, the structure reliability analysis method was presented based on response surface method （ RSM ）. Regarding the material properties, load and performance parameter of material LCF as random factors, the RSM were adopted to conduct reliability analysis, then the LCF reliability analysis for an aeroengine turbine disc was performed and the comparison of Monte Carlo method and RSM demonstrates that the calculation of RSM is quicker and more accurate, and it has better practical for reliability of LCF of real turbine disc investigation.

关 键 词：涡轮盘 航空发动机 可靠性 低循环疲劳 响应面法 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程] TU72[建筑科学—建筑技术科学]