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ank

How to apply time varying pressure load in radioss

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How to apply time varying pressure load in radioss ?I wanted to apply a load on a surface which is time varying in nature.For the same i am applying in the form of pressure how to apply and what points need to take care ?

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Hi,

When you apply pressure load in RADIOSS a function needs to be created which is pressure vs time function. And the load will be applied based on this function.

Create a surface set or contact surface and apply /PLOAD on the same.

 

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Hi,

You can create a similar curve, that is ramp the load from time 0.

As an example, the curve looks like        0    100

                                                                       1    100

 

 

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image.png.47e484313f22b974f23ac5462feeda5d.png

As I can apply conc. load on nodes if I want to apply force uniformly I need to apply pressure load but pressure act perpendicular o surface direction.If I want to apply uniform load on a surface in particular direction?

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Is application of pressure is equivalent to application of concentrated load on nodes ?

 

In case of pressure i care about area and in case of conc. load i care about number of nodes.

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Hi,

I don't think they are equivalent since two elements share one node.

As a workaround you can try this: If you have the pressure value calculate the force (F) from it (F/A) and apply it equally to all the nodes in that surface.I feel that the values will be somewhat closer. You can just try this.

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