Yes, the ram is stroking horizontally and has dynamic vertical vibration due to its own weight. I don't say it has no horizontal vibration excited by the machine's own drive system, but problems arise from the vertical vibration only... e.g. the ram hits the cylindrical tool around it near the...
Do such bearings have significant damping or rather the material damping of the ram shall be considered in the model?
I assume that the stiffness of the bushing against rotation/bending of the shaft would also derive from the bearing stiffness, right?
GSC
Hi,
A long cylindrical ram which is making axial alternating movement, and bending mostly due to its own weight. The ram is supported by two hydraulic bearings with pressure control and a slide joke at the drive side. The vertical vibration of the ram often causes problems at certain speeds.
We...
Hi,
We have a long cylindrical ram which is making axial alternating movement, and bending mostly due to its own weight. The ram is supported by two hydraulic bearings with pressure control and a slide joke at the drive side. The vertical vibration of the ram often causes problems at certain...
Drej> Thank you for your post, I see the point in modelling the bearings as springs and assuming that material damping is present.
Can you please explain to me what do you mean with considering the type of connection when applying the damping? Do you refer here to the bearing type in the real...
Hello,
I would like to build an FE model to investigate the dynamics of a long shaft which is making axial alternating movement, and bending mostly due to its own weight. The shaft is supported by hydraulic bearings with pressure control. How shall I take these bearings into consideration in...
Try the Visible Human Project for the heart shape.
Somewhere deep there you can download the raw image data.
I had success with it modeling the spine.
http://www.nlm.nih.gov/research/visible/visible_human.html
gsc
Tobalcane >
When we weight something in metric we weight according to Isaac Newton's Second Law of Motion. The acceleration of an object is proportional to the force exerted on it divided by the mass. This is how force is normally defined, by the formula usually stated as F = k·m·a. (The units...
Hi,
I am a mechanical engineer, I have a good knowledge on steel structures, but almost nothing when it comes to bricks or concrete.
I need to reinforce my house wall. I think the structure what was asked for is what you call shear frame, but please correct me if I am wrong.
In practice I...
MVD,
What you described is really typical in the NL. Everyone must agree even for the simplest decision. I personally took it on a way that the questions they ask are not offending. They are not questioning my authority or knowledge. It is just curiousity, and they want to make sure, that...
-I agree with RDK, good or perfect resumee and CV is a very important phase of jobhunting.
-Assess how many applications you have sent. 1 interview from 30 applications is good in the UK being non-british.
-Due to the increased security measures in the english speaking nations since Sep.11...
I agree with brad in terms of that changing the license server is a change to the network, however charging you for administration fee after an incidental hardware failure is completely insane, and unacceptable. Even if it is stated in the license agreement, the business manager should act as...
