This tutorial was created using ANSYS 7.0 The purpose of this tutorial is to show the steps involved to perform a simple transient analysis. We can easily change a few values in these files and re-run our whole solution from these load case files. Set a time of 0 for the end of the load step (as shown below). After the application of the load, we track the response of the beam at discrete time points for as long as we like (depending on what it is that we are looking for in the response).
This will specify a time step size of 0.001 seconds to be used for this load step. Let's assume the mass of 6086 kg is bolted to the beam
dynamic simulation inventor so it never comes off and there is no cable snap to be concerned with, and the only cycles you care about are the bumps in the road.
If inertia effects are negligible for the loading conditions being considered, a static analysis may be used instead. Note that for the reduced method, a constant time step is required throughout the time range. For most problems, one need not go further than Reviewing the Reduced Results as the response of the structure is of utmost interest in transient dynamic analysis.
For our case, we will impact the end of the beam with an impulse force and view the response at the location of impact. The Motion Links Toolkit provides an automated method for quickly setting up these kind of systems and post processing them in an easy manner.
We will use the Reduced Method for conducting our transient analysis. Therefore, a modal analysis of the structure should be initially performed to provide information about the structure's dynamic behavior. We did not specify damping in our transient analysis of the beam.
If it is hanging from a cable, when the beam accelerates downward at 1.8 G, the mass that is hanging below can only accelerate downward at 1 G and the cable goes slack. ANSYS Motion, now in the Mechanical interface, is a third generation engineering solution based on an advanced multibody dynamics solver.
The simple cantilever beam is used in all of the Dynamic Analysis Tutorials. We need to establish initial conditions (the condition at Time = 0). Since the equations for a transient dynamic analysis are of second order, two sets of initial conditions are required; initial displacement and initial velocity.