Inertial relief does not work for Topology Optimisation as I mentioned in my previous comment. That's why I am seeking help on how to write following acceleration update steps in a APDL code form.nn1. Solve the topology optimisation using acceleration a.n2. Get the mass of the optimised part for iteration 1n4. Calculate new accelerationn5. Replace old acceleration by the new accelerationn6. Acceleration needs to be updated for each iteration because mass is changing after each iterationn7. Repeat step 1 ? 5 until the model converges and final optimised part is getn