典型仪器支架动力学管控方法研究

Dynamic Control Method of Typical Equipment Supporter

航天工程中普遍采用支架进行设备的安装,但是支架对振动环境的严重放大会影响设备的工作可靠性,给飞行器飞行带来极大隐患,需要开展典型支架的动力学管控方法研究。提出面向支架动特性管控的动力学特性指标,可以全面表征仪器支架在随机振动激励下的动力学特性,并可据此构造优化目标,以对支架动力学特性进行有效管控。提出典型仪器支架的动力学管控方法,实现了将支架动特性设计融入支架结构设计流程中。针对一种典型的仪器支架开展了随机振动试验与有限元仿真分析,验证了随机振动响应预示方法的准确性,并以此为基础,对其进行了动力学管控。以某型支架为对象开展的动力学管控,将支架上相对安装基础的振动量级放大倍数从4.2降低到1.67。结果表明,提出的典型仪器支架动力学管控方法可在研制初期改善仪器支架的动力学特性,对提高飞行器可靠性和环境适应性具有重要意义。

In aerospace engineering,equipment supporters are generally used to install equipment.However,the serious amplification of the vibration environment by the supporter will affect the reliability of the equipment,and may bring great hid-den dangers to the flight of the aircraft.Therefore,it is necessary to research the dynamic control method of the typical equip-ment supporter.The dynamic characteristic indexes for supporter dynamic characteristic control is proposed,which can com-prehensively characterize the dynamic characteristics of equipment supporter under random vibration excitation,and an optimi-zation target can be constructed to effectively control the dynamic characteristics of support based on the proposed indexes.The dynamic control method of a typical equipment supporter is proposed,and the dynamic characteristic design of supporter is in-tegrated into the structure design process.The random vibration tests and finite element simulations are carried out for a typical equipment supporter.The accuracy of the random vibration response prediction method is then verified,and the dynamic control is carried out on this basis.The dynamic control of the equipment supporter as an objective was dynamics controlled,and the vibration magnitude magnification of the supporter relative to the installation base was reduced from 4.2 to 1.67.The results show that the dynamic control method of the typical equipment supporter proposed can improve the dynamic characteristics of the equipment supporter in the early stage of development,which is of great significance to improve the reliability and environ-mental adaptability of the aircraft.