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Accelerations to Mass of Structure

Question asked by Lakhvinder Singh on Jan 23, 2014
Latest reply on Jan 24, 2014 by Lakhvinder Singh

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Hi,

I am trying to do a static analysis on a skid a structure as per DNV codes with SolidWorks Simulation. I need to apply 0.75g in all three directions (X, Y, Z) to the mass of the structure. The details are:

1. The structure has a mass of 20,000 Kgs in reality (due to euipment inside it). To get the actual mass on the structure I have over rided the mass properties and added mass to the structure at its actual CG location. Now the structure has "actual" mass of 20,000 Kgs.

2. As said above, now I need to apply 0.75g in all three directions (X, Y, Z) to the mass of the structure. Like +X, +Y, +Z, the next one will be +X, +Y, -Z, and then it will be -X, +Y, +Z and so on. Is there any way I can do all different combinations (of X, Y and Z) in a single study? Or will I have to do different combinations in different study?

3. Also, will the "overrided mass value" be used in the simulation?

Regards,

Jared Conway Jan 24, 2014 12:28 PM

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overridden masses don't get carried over to simulation you'd have to add a remote or distributed mass in simulation to do something similar.

on applying multiple gravities, you can't do more than 1 at a time but if you expand the advanced options you can add other directions if you want.

but i don't think i really understand what the load application is. but you can do it if you want.

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Shaun Densberger Jan 23, 2014 9:47 PM

You could always use a remote or distributed mass (depending on what you're after).
If I recall correctly, you can't have more than one gravity load defined, but I'd wait to get someone more knowledgeable to confirm that. This is unfortunate (if true), as it's a lot more efficient to solver a stiffness matrix once with multiple load sets (instead of multiple times with one load set each).
Not sure if the override mass value works in simulation, so you maybe use (1).

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Jared Conway @ Shaun Densberger on Jan 24, 2014 12:28 PM

overridden masses don't get carried over to simulation you'd have to add a remote or distributed mass in simulation to do something similar.

on applying multiple gravities, you can't do more than 1 at a time but if you expand the advanced options you can add other directions if you want.

but i don't think i really understand what the load application is. but you can do it if you want.

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Jaspreet Hothi Jan 24, 2014 4:15 PM

Another trick you can use to quickly create and solve different studies at once is to copy-paste the studies. Modifying the G loads and then solve them all at once in batch. Use the "Run all studies" option.

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Lakhvinder Singh Jan 24, 2014 8:58 PM

Jaspreet/Shaun/Jared,

Thanks for sharing the tips. It's more clear now.

Regards,

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4 Replies

Shaun Densberger Jan 23, 2014 9:47 PM
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1. You could always use a remote or distributed mass (depending on what you're after).
2. If I recall correctly, you can't have more than one gravity load defined, but I'd wait to get someone more knowledgeable to confirm that. This is unfortunate (if true), as it's a lot more efficient to solver a stiffness matrix once with multiple load sets (instead of multiple times with one load set each).
3. Not sure if the override mass value works in simulation, so you maybe use (1).
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- Jared Conway @ Shaun Densberger on Jan 24, 2014 12:28 PM
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  overridden masses don't get carried over to simulation you'd have to add a remote or distributed mass in simulation to do something similar.
  
  on applying multiple gravities, you can't do more than 1 at a time but if you expand the advanced options you can add other directions if you want.
  
  but i don't think i really understand what the load application is. but you can do it if you want.
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Jaspreet Hothi Jan 24, 2014 4:15 PM
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Another trick you can use to quickly create and solve different studies at once is to copy-paste the studies. Modifying the G loads and then solve them all at once in batch. Use the "Run all studies" option.
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Lakhvinder Singh Jan 24, 2014 8:58 PM
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Jaspreet/Shaun/Jared,

Thanks for sharing the tips. It's more clear now.

Regards,

LS
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Accelerations to Mass of Structure

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