# Can a point load be applied on a ship by NAPA software-The loading direction of point

Discussion in 'Software' started by xichyu, Oct 15, 2016.

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### xichyuJunior Member

Could NAPA software be used freely？

2. Joined: Oct 2008
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Point loads can be applied to any FEA model. However caution must be used.

Mathematically we can write is as: F(x) = [x-a]^n. But when n = -1, which is a point load or singulairty it becomes:

F(x) = [1/(x-a)] => when x not = a F(x)=> 0, but when x = a (point load) F(x) = infinity.

In other words you get an infinite stress at that point. Therefore you must learn how to mesh in way of point loads, as well as learn how to apply point loads into an FEM without creating such high stress gradients which affects the results.

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### snogNew Member

Yes.
Yes, if you have a license.

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### xichyuJunior Member

Is it a free software？

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### KailaniSenior Member

No. Email: sales (at ) napa.fi

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### xichyuJunior Member

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