Features of the spring suspension operation during transverse roll

The paper deals with the issue of determining the roll stiffness of the truck suspension. The actual roll stiffness of the spring suspension differs from the theoretical one due to the design features of the spring suspension. The real roll stiffness of the spring suspension, in addition to the vertical stiffness of the springs, is affected by the stiffness of the silent blocks and the stiffness of the springs during lateral bending, as well as the stiffness of the springs during torsion. Analytical dependences for calculating the roll stiffness of the suspension are given. A mathematical model is considered that allows calculating the roll stiffness of the suspension by simulation modeling. Simulation studies have shown that the actual roll stiffness of the spring suspension may differ by 53% from the roll stiffness obtained by calculating the vertical stiffness of elastic elements.