直升机旋翼/机身动力反共振隔振器的优化设计  

Optimization design for dynamic anti-resonance isolators of helicopters' rotor/fuselage

作　　者：李园园[1] 陈国平[1] 王轲[1] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《振动与冲击》2016年第15期115-121,共7页Journal of Vibration and Shock

基　　金：江苏高校优势学科建设工程资助项目;航空基金(20141552014)

摘　　要：为提高直升机旋翼/机身反共振隔振器的隔振效率,对直升机主减隔振系统进行了优化设计。通过灵敏度分析,确定了以前后柔性梁的厚度和配重的密度作为优化设计变量,接着采用遗传算法对隔振效率和配重动能进行优化,考虑到仿真模型直接调用优化算法的计算效率较低问题,建立了基于响应面方法的优化近似模型。结果表明:优化后模型的某一阶反共振频率与激励频率一致,配重振动加大,力传递率下降,隔振效率大幅度提高。优化设计提高了动力反共振隔振器的隔振性能,可以为直升机隔振器的设计提供一定的指导。To improve the isolation efficiency of helicopter rotor /fuselage anti-resonance isolator,optimization for the isolation system was conducted.The thickness of the front and rear flexible beams and their counterweight density were taken as the design variables through sensitivity analysis,and then the isolation efficiency and counterweight kinetic energy were optimized using genetic algorithms.Considering the lower computational efficiency problem due to simulation models directly calling the optimization algorithm,a surrogate model was established with the response surface method.The results showed that after optimization,a certain order anti-resonance frequency is consistent with the excitation frequency, counterweight vibration increases,force transmission rate decreases and vibration isolation efficiency is greatly improved;optimization design improves the dynamic isolators＆#39;anti-resonance isolation performance and can provide a guidance for the design of helicopter vibration isolators.

关 键 词：直升机 反共振隔振器 响应面 优化设计 

分 类 号：V223[航空宇航科学与技术—飞行器设计]