摘要
在基于固定任务混频的寿命相关载荷累积量分布特性研究成果的基础上,推导了变任务混频条件下的寿命相关载荷累积量分布特性,结果表明:变任务混频的载荷参数累加量分布函数也是趋于正态分布.并采用数值方法模拟实际飞行过程中变任务混频条件下寿命相关载荷的累积过程,模拟结果和理论结果吻合良好,进一步验证了分析结果的正确性.该结果可用于变任务混频下的寿命可靠性预测.
Based on results of distribution characteristic of durability load accumulation of fixed task frequency mixing,distribution characteristic of durability load accumulation based on changeable task frequency mixing was deduced.Results show that distribution function of durability load accumalation of changeable task frequency mixing tends to be normal as well.The process of durability load accumulation with changeable task frequency mixing in real flying operation was demonstrated by numerical simulation,and the numerical results coincide with the theoretical results,which further demonstrates the analyzed results.Results can be used in life reliability forecasting based on changeable task frequency mixing.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2014年第11期2722-2728,共7页
Journal of Aerospace Power
关键词
航空发动机
结构寿命
载荷分布函数
任务混频
可靠性
aero-engine
structural life
load distribution function
task frequency mixing
reliability
