Understanding Simulation Commands
Large and complex moving assemblies coupled with hundreds of articulated moving parts can be simulated. The Autodesk Inventor Simulation provides:
Simulation Assumptions
The dynamic simulation commands provided in Autodesk Inventor Simulation help in the steps of conception and development and in reducing the number of prototypes. However, due to the hypothesis used in the simulation, it only provides an approximation of the behavior seen in real-life mechanisms.
Interpreting Simulation Results
To avoid computations that can lead to a misinterpretation of the results or incomplete models that cause unusual behavior, or even make the simulation impossible to compute, be aware of the rules that apply to:
Relative Parameters
The Autodesk Inventor Simulation uses relative parameters. For example, the position variables, velocity, and acceleration give a direct description of the motion of a child part according to a parent part through the degree of freedom (DOF) of the joint that links them. As a result, select the initial velocity of a degree of freedom carefully.
Coherent Masses and Inertia
Ensure that the mechanism is well-conditioned. For example, the mass and inertia of the mechanism should be in the same order of magnitude. The most common error is a bad definition of density or volume of the CAD parts.
Continuity of Laws
Numerical computing is sensitive toward discontinuities in imposed laws. While a velocity law defines a series of linear ramps, the acceleration is necessarily discontinuous. Similarly, when using contact joints, it is better to avoid profiles or outlines with straight edges.