I'd like to calculate natural frequency to evaluate a heat exchange tube vibration for my purpose.
Shell side: Carbon Steel (CS), 30 degree C to 40 degree C
Tube side: Stainless Steel (SUS), 55 degree C to 45 degree C
Table V-5.3 in page 6-5 need "A" as tube axial stress multiplier. V-6.1(Axial tube stress multiplier) says, "St of tube longitudinal stress may be calculated from Paragraph A.23."
On my case, the rate of thermal expansion of CS (shell side) is smaller than that of SUS (tube side). So, I guess A.24 of allowable tube compression stress is used to calculate natural frequency. Is it correct? or Is A.23 applicable for either case of extension or compression on the tube?
Thanks,
Shell side: Carbon Steel (CS), 30 degree C to 40 degree C
Tube side: Stainless Steel (SUS), 55 degree C to 45 degree C
Table V-5.3 in page 6-5 need "A" as tube axial stress multiplier. V-6.1(Axial tube stress multiplier) says, "St of tube longitudinal stress may be calculated from Paragraph A.23."
On my case, the rate of thermal expansion of CS (shell side) is smaller than that of SUS (tube side). So, I guess A.24 of allowable tube compression stress is used to calculate natural frequency. Is it correct? or Is A.23 applicable for either case of extension or compression on the tube?
Thanks,
