Vibration can be seen in field, I don't know how to analyses these phenomena in Autopipe. I guess Lift-off in v-stops is due to thermal expansion, I cannot use a guide support because the stresses rise and become out of permission by the code Dear Mike could you see the files I have send please, And if you can give me information of how to do a dynamic analysis I’ll appreciate too much. I make the calculation by hand of the thermal expansion using the thermal expansion coefficients of the material of which the pipe is made, this thermal expansion is 80mm and the pipeline doesn’t have nothing to compensate this expansion (like a joint expansion or expansion loop), do you think this is why the pipeline is vibrating.
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