Finite Element Analysis of an Axially Mov

[jadu]

Hi All,




I have a problem of solving an axially moving beam nested within a
stationary, simple supported envelope beam using ProMechanica. If anyone
knows how to deal such problem in ProMechanica or any other FEM
software it will be a really great help. I am trying to describe the
problem in details.




I want to solve an axially moving beam nested within a stationary,

simple supported envelope beam. This type

of problem arises in spacecraft antennas, band-saw blades, telescopic

robotic manipulators, modeling of flexible links traveling through

prismatic joints etc. Here, the instantaneous length (L(t)) of the

protruded part of the beam is a function of time. And the axial motion

of the beam is caused by a uniform acceleration field, such as gravity,

there will be no axial force in the beam. A second case could be when

the axial motion occurs at constant velocity, i.e. L_{double dots}=0.
Now I want see how the moving beam deflects with such velocity. There
will be some friction at the bearing. I shall be

grateful to you if you could kindly share your ideas to solve the

problem. Or if you have any materials that deal with similar issue, I

will be highly obliged.




Thank you.




Best regards




Jadu