orangi55
Civil/Environmental
- Jul 28, 2015
- 4
Hi guys,
I am trying to model the effect of moving truck (pressure) load over a bridge structure, before I start I wanted to try the simple case of moving a plate with uniform pressure load over a simply-supported beam from one end to the other at constant velocity. Right now I am having trouble with making the plate move along the beam as time passes, and my plate appears to be sinking into the beam structure for some unknown reason. This is my model:
Property: steel loading plate over steel beam (same material)
Interaction:
The steel plate is under kinetic coupling with reference point RP1, and is defined to have surface contact with the top surface of the beam (beam=master, plate=slave), contact is defined for both tangential and normal.
I defined 2 steps:
- loading: step 1 applies 2500N load vertically down at RP1 over 0.1s, steps 2 keeps that load over 1s
- reference point RP1 is fixed in all directions except U2 (vertical displacement) in the initial step, and moves -1500mm over 1s in step 2 (to the other end of the beam)
When I run the model, the plate sinks into the beam surface right away in step 1 in deformed contour, which is weird since I defined beam as master surface:
at the beginning of step 2: the plate immediately jumps to another location, and model immediately loses all deformation
In step 2, the stress concentration seems to be moving, but the plate itself is not.
I have attached my cae file underneath,
Any insight would be extremely helpful, thank you so much!
I am trying to model the effect of moving truck (pressure) load over a bridge structure, before I start I wanted to try the simple case of moving a plate with uniform pressure load over a simply-supported beam from one end to the other at constant velocity. Right now I am having trouble with making the plate move along the beam as time passes, and my plate appears to be sinking into the beam structure for some unknown reason. This is my model:
Property: steel loading plate over steel beam (same material)
Interaction:
The steel plate is under kinetic coupling with reference point RP1, and is defined to have surface contact with the top surface of the beam (beam=master, plate=slave), contact is defined for both tangential and normal.
I defined 2 steps:
- loading: step 1 applies 2500N load vertically down at RP1 over 0.1s, steps 2 keeps that load over 1s
- reference point RP1 is fixed in all directions except U2 (vertical displacement) in the initial step, and moves -1500mm over 1s in step 2 (to the other end of the beam)
When I run the model, the plate sinks into the beam surface right away in step 1 in deformed contour, which is weird since I defined beam as master surface:
at the beginning of step 2: the plate immediately jumps to another location, and model immediately loses all deformation
In step 2, the stress concentration seems to be moving, but the plate itself is not.
I have attached my cae file underneath,
Any insight would be extremely helpful, thank you so much!