CAJ | 학술논문

为了解某救护直升机机载综合急救单元随机振动响应特性，针对载机平台振动特点，将载机宽带随机叠加正弦振动激励谱转换为ANSYS软件可用的纯随机振动谱，在ANSYS软件中建立了机载综合急救单元有限元模型，通过模态分析，获取了机载综合急救单元固有频率和振型。在此基础上施加转换后的载机振动谱并进行随机振动分析，得到了机载综合急救单元不同部位在激励频带范围内的动力响应及危险频率点，并对单元结构动强度进行了校核。仿真分析结果可为机载综合急救单元的抗减振设计提供参考依据。
위료해모구호직승궤궤재종합급구단원수궤진동향응특성，침대재궤평태진동특점，장재궤관대수궤첩가정현진동격려보전환위ANSYS연건가용적순수궤진동보，재ANSYS연건중건립료궤재종합급구단원유한원모형，통과모태분석，획취료궤재종합급구단원고유빈솔화진형。재차기출상시가전환후적재궤진동보병진행수궤진동분석，득도료궤재종합급구단원불동부위재격려빈대범위내적동력향응급위험빈솔점，병대단원결구동강도진행료교핵。방진분석결과가위궤재종합급구단원적항감진설계제공삼고의거。
To understand the random vibration reponse characteristics of the integrated airborne aid unit on ambulance helicopter, the finite element model of the unit was built by using ANSYS software. According to the vibration characteris-tics of the airborne platform of the ambulance helicopter, the randomly superimposed sinusoidal excitation spectrum of the airborne broadband was converted into a pure random vibration spectrum useable directly for ANSYS. The natural frequen-cies and modals of the unit were obtained by modal analysis. On this basis, the converted vibration spectrum was exerted so that the dynamic response and the critical frequencies in different positions of the integrated airborne aid unit were derived by the random vibration analysis. Meanwhile, the dynamic strength of the unit structure was checked up. The result of the analysis has provided a reference for anti-vibration design of the integrated airborne aid unit.