Some question about input file

Hi dear sir A.kumar

I checked the input; here is some question about it

1. In the Interaction module you defined a surface-to-surface
contact (standard) which master surface is BRIDGE-SURF and slave surface is
VEHICLE-WHEEL. You defined BRIDGE-SURF as a surface. It is available to define
a beam as a surface just for 2 dimensional beams, but my model has 3
dimensional beams, so how I could define this contact?

2. Increments: in the visualization module there are 900 frames to
show moving oscillator, the oscillator passes half of bridge length, how I
could make it to pass whole of bridge length? And how I could change the number
of frames?

3. In Dynamic, Implicit step, why you define time period= 0.9?

Sincerely