Usually we do need to ensure linear static analysis of the structure is not rigid displacement, otherwise there is no way to calculate solver. But many analysts,
Such as aircraft in flight, the ship is at sea (the entire object has an acceleration), in order to calculate the stress distribution on the structure, need
Release inertia (inertia relief), applying a false reaction forces to ensure that the force balance on the structural configuration.
Inertia release is MSC. NASTRAN or ANSYS is an advanced application that allows for fully unconstrained structural static analysis.
Simply put, it is called inertia (mass) force structure to balance the external force. Although the structure is not binding, it is still assumed that the analysis in a "static"
Balanced state. When the inertial release function static analysis, only one constraint node six degrees of freedom (virtual mount). Against
The carrier, the program first calculates the acceleration in each direction of each node of an external force, and inertial forces into acceleration inverted
Applied to each node, whereby a balanced force system configuration (bearing reaction force is equal to zero). Solving described displacement obtained with respect to all nodes
The relative movement of the bearing.