which elements (RBE2 or RBE3) should used for mass element connection.

i am creating lumped mass of component and want to distribute the mass to the nearest connecting components. please suggest me that RBE2 or RBE3 element is best to use to simulate the same.

similarly, for applying belt tension load over rotor pulley, resultant force or tension need to be applied. here also, suggest me best practices to apply force over belt wrapping angle