Research in simulation of frequency variety and equivalent algorithm for metal helical spring stiffness

To study the response of the metal helical spring stiffness to the frequency,the present researcher adopted the dynamic stiffness matrix method to calculate the stiffness under the load of different frequency.And the result shows that the variety of the stiffness of spring is caused by the resonance itself mostly,and with the frequency increasing,the effect on the stiffness becomes more obvious.With the distribution mass of spring considered,the system of series spring-mass of multi-mass was used to substitute the helical spring.The result shows that the equivalent algorithm used in time domain calculation in multi-body system can accurately reflect the nature of the frequency variety of heliacal spring.