Automobile stabilizer bar multidisciplinary optimization design method based on fatigue and tilting performance

Abstract

The invention relates to an automobile stabilizer bar multidisciplinary optimization design method based on fatigue and tilting performance. The automobile stabilizer bar multidisciplinary optimization design method comprises the following steps: step 1, performing problem identification and P graph analysis; step 2, building a stabilizer bar fatigue simulation analysis model, conducting fatigue simulation analysis on the stabilizer bar, building a front suspension tilting simulation analysis model, and conducting tilting simulation analysis on the front suspension; step 3, carrying out parametric modeling of design variables; step 4, carrying out DOE sampling calculation of design variables; step 5, extracting DOE sample points and calculation results, constructing a response surface approximation model I based on fatigue performance, and constructing a response surface approximation model II based on roll performance; and step 6, based on the two approximate models in the step 5, performing optimization design on the stabilizer bar by taking the tilting performance as a constraint condition and taking the minimum fatigue damage as an optimization target. The stabilizer bar structure capable of simultaneously meeting fatigue and tilting performances is designed more efficiently by comprehensively applying CAE simulation and MDO technologies.

Description

technical field [0001] The invention relates to chassis multidisciplinary design optimization, in particular to a multidisciplinary optimization design method for an automobile stabilizer bar based on fatigue and roll performance. Background technique [0002] In order to maintain the stability of the body posture during high-speed cornering, a stabilizer bar is usually added to the car design to increase the roll stiffness of the vehicle without changing the vertical stiffness. An ideal passive suspension design requires softer vertical stiffness to improve comfort and stiffer roll stiffness to improve handling stability. The stabilizer bar correlates the movement of the left and right wheels, decoupling the vertical mode and roll mode of the vehicle suspension, thereby changing the vehicle roll stiffness without affecting its vertical performance. Therefore, in the design of the stabilizer bar, we should focus on the influence on the roll stiffness of the suspension syste...

AI Technical Summary

Problems solved by technology

However, due to the failure to fully consider the coupling, constraints and synergistic effects between various performances, such a design lacks systematic and overall, and the design results are difficult to achieve the "optimum" of the system; in addition, the "serial design" mode requires The performance of each of the two disciplines is repeatedly verified for multiple rounds, resulting in an increase in the design cycle and an increase in design costs

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