Assessment of the vehicle vibration loading with taking into account the dynamic stiffness of the leaf spring

Abstract New multilink models of leaf spring suspensions take into account a number of important features. First, we are talking about the features of the kinematics of suspension elements in the design scheme of the vehicle. Their account is provided by application of the differential equations of large displacements of bodies and also modeling of a leaf spring in the form of the links, connected by joints. Secondly, the nonlinearity of the hysteresis dynamic characteristics of the suspension is taken into account, with the help of which the dynamic stiffness of the leaf spring is considered. The dynamic stiffness is depending from the dry friction between spring leafs and the amplitudes of cyclic oscillations with a random external road forcing. Thirdly, the accuracy of the installation scheme of the leaf spring in the vehicle suspension is considered. It takes into account the peculiarities of fixing the leaf spring and their impact on the change in stiffness.