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Total energy not constant at impact

Hello everyone,

I am simulating an impact of a cylinder on a plate and I have found something not coherent. When the cylinder hits the plate, the total energy is not constant anymore. But it should. Does someone know why the total energy increases and then decreases ?

Thank you for your help.

Emilien

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Rahul Rajan_21763

Hi,

Could you share us .out file of the run?

Regards

Rahul R

Altair Forum User

Here they are.

Regards

Emilien

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Rahul Rajan_21763

Hi,

See attached screenshot.

Regards

Rahul R

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hello,

As you can see, Y-velocity (radial velocity) is not null, exactly when the total energy is increasing and decreasing. How do you explain it ? Would the Y-velocity have a link with the derived function of the total energy ? The Y-velocity curve shows the radial velocity of which part ?

At the end of the computation, the total energy is not increasing or decreasing anymore.

Regards,

Emilien

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi Emilien,

Can you check the animation of the simulation for any vibrations?

I think the energy transformed into vibrations will be a fraction of total energy.