I want to apply the shock loading to the horizontal vessel mounted on the saddles. Loading is assimilated as the equivalent static acceleration in three mutually perpendicular directions acting independently(No combinations) in operating condition.
Is there any provision to apply and design for this loading in Autopipe.
I was trying to simulate the shock loading by giving the motion load option in Autopipe. Is it the right option to choose for shock loading?
While giving motion loading in transverse direction, getting error message as " Effective sadle angle<30 degrees." How to resolve this error.
Any kind of help is appreciated.
If you can find the equivalent inertial force due to shock and the corresponding acceleration then you can apply it as motion load. That will be correct approach. Please attach file for your second question. Attach directly or email to me at firstname.lastname@example.org
you have a very high transverse load perhaps due to which the angular shift due to transverse reaction is very high and the effective angle after subtracting this shift is less than 30 degree. You can increase the saddle angle and try again. you may use other type of saddles as well.
Thank you for your reply. I have used the the motion loading option to simulate the shock loading. As per my understanding saddle reaction and saddle check is as per first principle as it has got no guideline in any code. I could understand the calculation for the saddle reactions,shear loads and moments in vertical and horizontal direction. But methodology for saddle design(Saddle check for transverse and longitudinal loading) is not understood. If you can share any tutorial or file explaining the procedure, it would be a great help. I've checked in PVElite software and it seems that the results are different for the two softwares. Just trying to understand the methodology.
Manoj, AutoPIPE Vessel determines the saddle reactions using advanced numerical analysis (matrix reduction) technique so it is much more accurate than other softwares, also you can design upto 10 saddles using AutoPIPE Vessel.
If you want to learn more about saddle reactions and all the questions you asked above, please see my techtalk below, if you still have questions please ask me again: