ACP Inventor Nastran and Dynamic Simulation Flashcards
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In Inventor Nastran, what is the purpose of mesh refinement controls applied locally to specific geometry features?
Answer: To increase mesh density in high-stress or geometrically complex regions for improved accuracy
Local mesh refinement increases element density at critical areas (holes, fillets, stress concentrations) where higher accuracy is required.
What does a 'frictionless' support boundary condition simulate in Inventor Nastran?
Answer: A surface constrained only in the direction normal to it, free to slide tangentially
A frictionless support constrains displacement only in the surface normal direction, allowing the surface to slide freely in the tangential plane.
In Inventor's Dynamic Simulation, which joint type replicates the behavior of a ball-and-socket connection with three rotational degrees of freedom?
Answer: Ball
A Ball joint (spherical joint) allows rotation about all three axes, modeling a ball-and-socket connection with three rotational degrees of freedom.
What is the purpose of running a 'Linear Buckling' analysis in Inventor Nastran?
Answer: To determine the critical compressive load at which a slender structure may suddenly buckle
Linear Buckling analysis predicts the critical load multiplier at which a slender structure becomes unstable and buckles under compression.
In Inventor's Dynamic Simulation environment, what is the role of a 'damper' force element?
Answer: To resist motion by dissipating kinetic energy as a function of velocity
A damper resists relative motion between two points by producing a force proportional to their relative velocity, dissipating energy.
When a simulation in Inventor Nastran shows high stress concentrations at a re-entrant corner, what is the recommended design approach to reduce them?
Answer: Add a fillet radius to the sharp corner to smooth the stress flow
Adding a fillet radius to a sharp re-entrant corner smooths the stress flow path and significantly reduces stress concentration factors.