摘要
以安装在螺旋桨飞机上的电子设备机柜为例,介绍了一种基于有限元分析的机载电子设备减振设计方法。利用ANSYS软件建立电子设备机柜有限元模型,通过有限元模态分析,得到机柜的固有频率。施加载机真实的振动谱型进行随机振动分析,得到机柜不同部位在激励频率范围内的响应和危险频率点。利用分析结果和减振理论确定减振系统的减振效率,进行系统减振设计。通过结果分析和试验验证,证明该方法是合理可行的。
Taking an electronic rack installed in a propeller aircraft as an example,an anti-vibration design method based on finite element analysis was introduced.Firstly,the finite element model of the rack was built by using ANSYS software,and the natural frequencies of the rack were obtained by means of modal analysis.Secondly,random vibration analysis was performed through exerting the power spectral density of the propeller aircraft,and the random vibration response statistics at different positions of the rack and the dangerous frequencies were obtained.Finally,according to the analyzed results and the vibration reduction theory,the natural frequencies of the anti-vibration system were determined,and the anti-vibration design of the system was performed.The analysis results and the test data verified the feasibility of the proposed method.
出处
《振动与冲击》
EI
CSCD
北大核心
2010年第5期230-234,共5页
Journal of Vibration and Shock
关键词
电子设备
有限元分析
减振设计
electronic equipment
finite element method
anti-vibration design
