Improvement of the Method of Suspension Vibration Isolation Properties Evaluation Under the Vibration Load Norms

The article is devoted to improving the methodology for the analytical determination of the boundary frequency-response characteristics (FRC) of the vertical vibrations of the vehicle sprung masses according to the parameters of a road microprofile and the norms of vibration load. A description of a method for evaluating the vibration isolation properties of a vehicle suspension under specified operating conditions according to vibration load standards is given. An algorithm for evaluating the vibration isolation properties of a vehicle suspension according to vibration load standards is presented. The drawbacks of graphical construction using the given technique of boundary frequency response are revealed. An improved technique can be applied to cars with linear suspensions and those the linearization of which is permissible in the modes of car operation. The improved method will allow obtaining the sought limit FRCs, providing the fast and high accuracy compliance with norms by means of using the known characteristics of the road microprofile, time and velocity. The methodology also facilitates the task of selecting the values of the suspension parameters in the process of their regulation in suspensions, adjustable depending on the conditions of movement.