The invention belongs to the technical field of aviation, and relates to a method and system for evaluating the vibration reduction effect of an aircraft APU vibration isolation device, a ground test bench with high rigidity is selected, an APU body is horizontally arranged in the middle of the ground test bench, and three groups of vibration isolation devices are arranged at different positions of the APU body respectively; each vibration isolation device is correspondingly provided with two groups of data acquisition devices; and then secondary ground driving is carried out through the vibration isolation device and the rigid false part, an elastic acceleration measurement result and a rigid acceleration measurement result are obtained, and the vibration isolation effect of each pull rod mounting support is calculated through root mean square. The vibration isolation device and the mounting pull rod are taken as an integral elastic unit, and an effective vibration isolation effect can be obtained by measuring the vibration acceleration on the large-rigidity test bed; the situation that the evaluation result is not real due to the foundation rigidity is effectively avoided, meanwhile, the root-mean-square of the acceleration power spectral density representing the vibration energy is introduced, and the vibration isolation effect can be effectively evaluated.
本申请属于航空技术领域,为一种飞机APU隔振装置减振效果的评估方法及系统,选用刚度较大的地面试车台架,APU本体水平设于地面试车台架的中部,隔振装置共有三组并分别设于APU本体的不同位置;每个隔振装置对应设置两组数据采集装置;而后分别通过隔振装置和刚性假件进行二次地面开车,分别获得弹性加速度测量结果和刚性加速度测量结果,通过均方根计算每个拉杆安装支座的隔振效果。将隔振装置和安装拉杆看做整体弹性单元,通过测量大刚度试验台架上的振动加速度,可以得到有效的隔振效果;有效避免基础刚度造成的评估结果不真实情况,同时引入代表振动能量的加速度功率谱密度的均方根,可以有效的评估隔振的效果。
Method and system for evaluating vibration reduction effect of aircraft APU vibration isolation device
一种飞机APU隔振装置减振效果的评估方法及系统
2025-02-18
Patent
Electronic Resource
Chinese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen |
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