Reciprocating Compressor

[marchieV]

Hello.

Can I use the Modal Analysis Type under Dynamic Analysis of CAESAR II Program in checking the natural frequency of piping requirements of 4Hz connected in a reciprocating compressor?

Thank you.

Regards,

March

 

[KevinNZ]

Autopipe does this, so I would assume CAESAR II does too. You will need to understand how non linear supports are modelled in the determination of the modal nodes.

 

[saplanti]

Both do the same thing. But the software analysis can create the natural frequencies in the allocated range, does not investigate or check against your certain frequency.
You need to look at frequencies, at least first three, with +/- 25% range and check if your 4 Hz stays within those ranges. If so you need to change the piping frequency, otherwise pipe will be in resonance.

You need to make sure that 4 Hz of frequency is adequate for the application. Check API 618 latest edition.