Hi,

My Client found the vibration problem on the piping system. He request me to solve this problem by using CaesarII. This system consists Choke Valve and Ball valve. Vibration is caused by the high pressure drop thru the choke valve.

I try to do dynamic analysis by using Modal Analysis to find out the natural frequency which match with the actual vibration.

My question is what is required data from measure from site to meet or use to compare with the shape of vibration at any mode of natural frequency. I guess that the displacement at vibration frequency. What else?

Thank you.