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How to apply spring element?

JS_9824412
13-Aquamarine

How to apply spring element?

Kind of new to the Spring element in CREO Simulate. Is it possible to simply the 5 spring disc washers (see below illustration) with only one spring element? I have simply the rod as a series of beam elements.

JS_9824412_0-1659038114438.png

 

Thanks for any hints.

1 ACCEPTED SOLUTION

Accepted Solutions
Chris3
19-Tanzanite
(To:JS_9824412)

If you make the spring an advanced spring then you can enter in the spring matrix in any of the vector elements that you need.

 

A beam does the same thing only it uses the geometry and material properties that you have provided to generate those stiffness values.

View solution in original post

7 REPLIES 7

@VladimirPalffy Could you please take a look?

Chris3
19-Tanzanite
(To:JS_9824412)

You can add datum points along the rod's axis and then connect beams or springs to those datum points to give you the stiffness / spring properties that you are looking for.

JS_9824412
13-Aquamarine
(To:Chris3)

Thanks.

 

One end of the spring element will be attached to one of the datum points that you have mentioned, the other end will be attached to a datum point added to the fixed supporting plate at the center of its through hole. This datum point is part of the plate through a rigid link or RBE2.

 

I am implementing the above now.

 

 

JS_9824412
13-Aquamarine
(To:JS_9824412)

Still don't know how to assign the stiffness values for compression spring. So I temporarily used a hollow beam to connect the two points for representing the stack of spring washers. I am not sure yet how much errors it has caused.

Chris3
19-Tanzanite
(To:JS_9824412)

If you make the spring an advanced spring then you can enter in the spring matrix in any of the vector elements that you need.

 

A beam does the same thing only it uses the geometry and material properties that you have provided to generate those stiffness values.

JS_9824412
13-Aquamarine
(To:Chris3)

Thanks for your enlightening and encouraging feedback. I am motivated to make the change now: replace the hollow beam element with an advanced spring element.

JS_9824412
13-Aquamarine
(To:JS_9824412)

Applied Kxx (the axial direction) as the calculated lb/in value, and let Kyy and Kzz be zero, the modal analysis shows rigid move modes. So gave Kyy and Kzz a random number saying 1000 lb/in as countermeasure. No idea how much error would be induced in vib analysis.

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