Dynamic modeling method and vibration transmission characteristics analysis of vehicle ISD suspension structure

In this paper, a new suspension vibration reduction structure is proposed by topology analysis of the suspension structure. The ISD (Inerter-Spring-Damper) suspension is dynamically modeled, and the vehicle vibration response is obtained by solving the dynamic differential equation.The vibration transmission characteristics of ISD suspension and its dynamic performance under various road conditions are studied. By comparing and analyzing with single-stage ISD suspension and hybrid ISD suspension, the suppression of resonance peaks during vibration transmission by the proposed two-stage ISD suspension is studied. The mapping relationship between suspension parameters and transmission characteristics has been clarified. The dynamic response of ISD suspension structure is discussed. The results show that, the peak of the transfer function gain of two-stage ISD suspension is significantly reduced compared to single-stage ISD suspension and hybrid ISD suspension, and indicates that the newly designed structure has excellent vibration reduction effect. Properly increasing the spring stiffness and inertia coefficient while meeting the requirements of vehicle acceleration gain can have a positive improvement effect on vibration reduction. Therefore, by comparing multiple indicators, it can be shown that the new suspension has a positive effect on improving the vibration reduction effect, which can effectively suppress the vibration.