nWhen using Inertia Relief, each time the Static Structural model solves, the balancing acceleration is part of the solution, so if you have a parametric design, and go through multiple design configurations where the mass changes, each design will have its own perfectly matched acceleration.nI haven't tried using Inertia Relief with Topology Optimization, but I expect it would work the same way, automatically finding a perfectly matched acceleration for each iteration on the mass. Have you tried it and found that it did not work?n