基于动力学优化的航空管道DFR疲劳寿命分析  

DFR Fatigue Life Analysis Based on Dynamical Optimization Design of Aviation Fuel Pipe

作　　者：鲁华平[1,2] 张峰[1] 李宝辉[1] 李永泽[2] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129 [2]空军航空大学机械系,长春130022

出　　处：《机械设计与制造》2012年第6期4-6,共3页Machinery Design & Manufacture

基　　金：陕西省自然科学基础研究计划项目(SJ08A17);西北工业大学科技创新基金资助项目(2008KJ02019);高等学校学科创新引智计划资助项目(B07050)

摘　　要：基于动力优化的有限元分析方法,以避开系统共振频率为目标函数,支撑位置为设计变量,对某型航空管道进行动力优化,得到该型管道支撑最佳位置;将最佳支撑位置优化结果与管道实际承受的载荷相结合,基于DFR法,对管道进行疲劳可靠性寿命分析并进行评估。结果表明:支撑位置对管道系统各阶固有频率影响较大,避开的系统共振频率不同,优化支撑位置也不同;基于最优结果的DFR法疲劳寿命分析可以为管道安全运行提供指导且该型管道疲劳寿命满足要求。The dynamical optimization analysis for aviation engine fuel pipeline was carried out based FEM with nature frequency as objective function,the sustainment position as design variable.And an optimal position of sustainment was achieved.Based on the DFR method,combined the optimal results for optimal position with actual bearing load of the pipeline,the fatigue reliability life for the pipeline was analyzed and evaluated,which result showed that the impact of sustainment position is more significant on natural fre quency of each order of the pipeline;The different resonance frequency the system has to avoid,the difference the optimal position was;DFR fatigue life analysis based on the dynamical optimization provides guidance for safe running of the pipeline.Therefore it can meet the requirement.

关 键 词：管道 模态 优化 DFR法 疲劳寿命 

分 类 号：TH16[机械工程—机械制造及自动化] O241.82[理学—计算数学]