Structural Modal Analysis and Optimization of SUV Door Based on Response Surface Method

Abstract EN

Sensitivity analysis and response surface methods were employed to optimize the structural modal of SUV doors.

A finite element numerical simulation model was established and was calibrated by restraint modal tests.

To screen out highly sensitive panels, a sensitivity analysis for the thickness of door panels was proposed based on the fifth-order modal frequency of the door.

Data points were obtained by a faced central composite design with the design variables from the thickness of the highly sensitive panels, and a second-order explicit response surface function of the fifth-order modal frequency of the vehicle door was established.

An optimization model was established according to the response surface method.

The final results demonstrate that the modal-frequency matching of the door and body in white was optimized after changing the thicknesses, with a 5.74% material reduction.