NX Nastran - Dynamic Response enables you to calculate your product's forced dynamic response to inputs (loads or motions) that vary with time or frequency. An add-on option to NX Nastran - Basic, it complements the linear static capabilities found in the Basic solution. Dynamic response capabilities play a key role in various industries such as assessing passenger comfort in aircraft and automobiles under different operating conditions; determining whether engine frequencies or tire excitations from the road suface will adversely affect responses at other areas of a vehicle, such as at the steering column or in the seats; or, evaluating the effect of vibrations on the performance of consumer products and other high-tech electronic devices.