钻石背弹翼抗风动力可靠性及其灵敏度分析

基于首次超越破坏准则,建立了钻石背弹翼在随机风载荷下的动力可靠性模型,并对其动力可靠性的参数灵敏度进行了研究。通过对结构在随机振动载荷下动力响应超越安全界限次数的研究,得到了钻石背弹翼的动力可靠性模型,并利用综合分析技术分析了输入参数对钻石背弹翼抗风动力可靠性的灵敏度。研究结果表明:在只考虑随机风载荷的情况下,增大翼厚或后翼条弦长、减少前翼条弦长或前缘后掠角有助于提高钻石背弹翼的抗风动力可靠性,但在设计中需要综合考虑弹翼的气动外形及其载荷。

Dynamic Reliability and Its Sensitivity Analysis of Diamondback Wing under Wind Load

Based on the first passage failure principle,the dynamic reliability model of diamondback wing under the random wind load was established,and then its dynamic reliability sensitivity was analyzed under the same condition.Via researching the times with structural dynamic response passing through the safety limit on the load of random vibration,the dynamic reliability model of diamondback wing was obtained.And its dynamic reliability sensitivity under wind load was investigated by using the comprehensive analysis technology.The results show that,in considering the random wind load only,to increase wing thickness and chord length of back wing or reduce chord length of front wing and leading edge sweepback can improve the dynamic reliability of diamondback wing under wind load.But it is needed to take synthetically into account the aerodynamic contour and other loads in engineering design.