Hi, The surface for 3D

Hi,

1. The surface for 3D beam can not be defined as the unique surface normal can not be determined from nodal connectivity. Therefore, 3D beam surfaces can only be used as slave surface in contact definition (check abaqus analysis manual -> spatial modeling -> surfaces -> element based surface definition). Therefore, you'll have to find another way around. Does your analyisis involve moving force only (inertia of subsystem to be neglected) or moving mass or moving oscillator?
2. Is is probably the deformation scale factor in the visualization. Make it one, and you'll see the oscillator passing the whole bridge.
3. The speed of the oscillator is 100 km/hr (27.778 m/s) and the length of beam is 25 m. Therefore, the time it takes for the oscillator to pass over the beam completely is 0.9s (25/27.77). Since, I am interested only in the response during the oscillator passes over the beam, therefore, the time period of dynamic step is 0.9s.

 If you want to neglect the moving oscillator's inertia (i.e. it is moving point load), then there is an alternative that doesn't require definition of contact interaction. But this is specialized technique and valid only for moving force analysis.

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The world started with 0, is progressing with 0, but doesn't want 0.