Author Topic: contant speed moving boundary condition?  (Read 3621 times)

halleluja

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contant speed moving boundary condition?
« on: May 05, 2019, 10:50:01 AM »
Hi everyone,

i want to do a simulation of metal-cutting. So the workpiece or the cutting-tool will move in a contant speed. How can i define a boundary condition and an initial condition?


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Prof. R.L. Taylor

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Re: contant speed moving boundary condition?
« Reply #1 on: May 05, 2019, 03:25:05 PM »
You should be able to move any "fixed" node with a displacement that has a proportional load that has the time function you want.

halleluja

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Re: contant speed moving boundary condition?
« Reply #2 on: May 06, 2019, 04:29:35 AM »
Thanks for your reply.

What i want to do is simulation of a transient probelm. So i need to define the initial velocity and displacement of all nodes.

If i ONLY move some nodes with a displacement that has a proportional load, the initial velocity and the initial displacement of all nodes have a default value ZERO?

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of the rest nodes is ZERO and the initial acceleration of all nodes is ZERO too?

Prof. R.L. Taylor

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Re: contant speed moving boundary condition?
« Reply #3 on: May 06, 2019, 12:25:41 PM »
You can use the INIT RATE command, see user manual "Initial Conditions" section.

With this you can set the initial velocity for all or part of the nodes.