Abstract: In order to improve the wheel performance of a class A car platform， the design process should be fit for the structure durable requirements through the bench tests. A virtual test bench was built to predict rapidly the wheel stress on the bench. The strain test of bench was compared with the simulation considering the effects of various influencing factors such as the bolt preload value， the interaction of contact area of spherical bolt and spoke， weld simulation， assembly surplus between the wheel rim and spokes， loading axis stiffness， stamping process， etc. Different schemes were all analyzed. The size of wheel rim and spokes was scanned. The thickness change of the stamping process to produce spokes was measured. The finite element model parameters were modified to make the simulation strain output more similar to the measured ones， and thus more accurate bench test simulation was established.

Key words: bench test, virtual test bench, strain gauge, parameter modification