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## Simulation Mechanical and Multiphysics

Member
Posts: 3
Registered: ‎11-05-2012

# Frequency Response Base Motion Creation

146 Views, 2 Replies
11-05-2012 11:15 AM

I have a printed wiring board with 13 holes and it will see a sweep of 5-500Hz at 0.65 G's and a remote rail load of 125lbf. The best way I could think of doing this is creating a base node below the board and link all 13 holes to this base node and then apply the loading and sine sweep G force to this node and see the effects through the board.

HOW DO I DO THIS IN ALGOR!!!!???? How do I create a single node within a hole? How do I create a base node for excitation loading?? Please help. None of your tutorials address this other than holding nodes on the truss base which I don't have on a board that is bolted.

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Distinguished Contributor
Posts: 135
Registered: ‎06-13-2012

# Re: Frequency Response Base Motion Creation

11-06-2012 01:58 AM in reply to: cwbachmann

If you are analysing from a CAD model, after meshing, you can create a single node within the hole using the Joint tool inside Mesh>CAD Additions>Joint where you can make either a pin(2 point) or a universal(1 point) joint.

Regards

Ilyas

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Valued Mentor
Posts: 435
Registered: ‎08-30-2012

# Re: Frequency Response Base Motion Creation

11-06-2012 08:24 AM in reply to: cwbachmann

It may not be necessary to create 1 node to apply the base acceleration. If I remember correctly (I do not have Sim Mechanical at the moment), you can specify a base acceleration which is applied to every node with a boundary condition in the applied direction. So if you specify an acceleration in the X direction, all nodes with a constraint in the X direction will get the acceleration; the Y and Z directions are not affected.

John Holtz, PE
Mechanical Engineer
Pittsburgh, PA

16 years experience with Simulation Mechanical
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