USE OF NONLINEAR ISOLATlON MOUNTS TO REDUCE VEHICLE AFI-ER SHAKE

摘要

Framed Vehicles often exhibit &er shake, or jiggle, when excited by rough road impacts. To controlthe amount of aftershake due to the response of full-vehicle modes, several methods are employed.Tuning the frequency response of key structural components to frequencies above the highest“excitation” frequency is one current method. Another is to integrate damping into the system.These methods can fall short of providing effective performance for two reasons: 1) added stiffnessoften introduces the transmission of additional force into the body 2) added damping can require theuse of non durable rubber compounds. Therefore, the use of non-linear isolation members is studiedhere. The measured response to impulsive inputs of a single degree of freedom system with differingmounting properties is presented here. The results show the extent to which mounting linearitycontributes to the shortening of the transient portion of the response to an impact without addingdamping to the system.