Random vibration

[dimmane]

Hello,

I am designing bumper (which is made of elastomer) for a sensor for aircraft which is subjected to random vibration. I have to calculate the total load acting on the bumper for worst case scenario to be able to design the bumper. I have the acceleration PSD and rms acceleration values for the particular zone on the aircraft where the sensor is placed. Can I now just multiply the total mass of the sensor with peak rms acceleration at that particular zone to get the total force acting on the bumper?

Thanks,
Dinesh

 

[673amol]

Hello dimmane.

No, It could be better to make a FEA of the bumper and make a random analysis. If you can not make this analysis, try to use the Mile´s ecuations. If you know what is the modal vibration frecuency and the ASD input(it is not PSD) obtain the rms stress and accelerations

good luck