Rubber bump stops are used in automotive suspension systems to absorb energy, limit the motion of wheels, and reduce vibrations. They are made from elastomeric materials that are non-linear and exhibit large deformation under loading. In the present paper, the bump stop used in a double-wishbone suspension system was analysed numerically to obtain the load–displacement curve and compared with experimental test data. The numerical analysis was done with a non-linear finite element (FE) model using ABAQUS software. The results showed good agreement between numerical and experimental data, with a difference of less than 2 per cent between them. Then dynamic analysis of the suspension system with the bump stop was done to recognize the stress and acceleration effects arising from use of this part in the system. For different vehicle velocities, the comparison between von Mises stress curves in two cases, with and without a bump stop on the lower control arm, showed higher stresses in the lower control arm in the presence of the bump stop and the comparison between acceleration curves showed lower acceleration in the lower control arm with the bump stop. Thus automotive engineers must pay attention to these effects to design suspension components correctly.
Non-linear dynamic analysis of automotive suspension system incorporating rubber bump stops
2011-08-01
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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