Learning Forum

[hsfyah]

Hi all.

I am currently working on my simulation on the performance of bolted-joint flanges.

I noticed that when I did the parametric analysis, my results are not the same (totally different) with the one on the Tabular Data when I change the No of steps. Anyone know why does this happen and what should I do?

*The results in the Parametric Analysis showed my some changes as I expected but the one with Tabular Data doesn't converge as I expected.

[peteroznewman]

nIn the first image, you have not shown that something was marked as a Parameter. Please show the line with the P on it in the Details window.nIn the second image, you have not indicated the P number so we can see the value that was put in the Table of Design Points.n

[hsfyah]

Hi, sir .nSorry, it's my bad for not clearly put the information.nOkay so here it is. I want to see how my flange changed when I increased the internal pressure. nThe first image shows the values of the pressure when I simulate it using the no of steps.n Then, the results when it is on the second image. (Result = 250.05 MPa)n Lastly, the results on the parametric analysis. (Result = 250.24 MPa)nWhen I compare both of them; for example at Pressure = 1.96 MPa, they're not showing the same result. nI don't know why and which way is more accurate to stimulate it.nnn

[peteroznewman]

nI see in the first image you have a Bolt Pretension. The correct usage of that is to Load in Step 1 and Lock in Step 2.nShow what happens to the Bolt Pretension in Step 9.nShow how the Bolt Pretension is configured for the Parametric Table of Design Points.nn

[hsfyah]

Hi, sir .nYes, I initially applied the bolt pretension in the first Structural Analysis model. nLater in the third SA model, I only took the adjustment value into it. nIn Parametric Table above, the column U is the value for the bolt pretension which is 10405 N.nThen in column X, you can see the value of the adjustment that I applied (1.3582e-4 mm).nnBelow I attached you the value of bolt preadjustment in the Steps mode. nn