车门限位多自由度激励的刚柔耦合识别及关门窗框抖动优化

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关键词：窗框抖动；刚柔耦合；振动传递函数；多自由度激励；限位器优化中图分类号：U469.1DOI：10.3969/j.issn.1004-132X.2025.11.038

Abstract：Aiming at the problems that traditional NVH analysis struggled to accurately extract and predict the dynamic excitation and response of vehicle doors during rotation，a new method was proposed and applied to vibration transfer function analysis based on rigid-flexible coupling for identifying MDOF excitation.Taking the abnormal shaking of the window frame during door closing in a specific vehicle model as the research objective，a whole vehicle rigid-flexible coupling model was established by using multibody dynamics method. The MDOF acceleration dynamic excitation at the limiter installtion points was extracted for transfer function analysis. The comparison between simulation and testing results shows that consistent peak values of vibration acceleration are detected at 12Hz ，which verifies the accuracy of the rigid-flexible coupling model. Then，the key factors affecting window frame shaking during door closing were analyzed via simulation，identifying the limiter structure as the core optimization target. An optimization scheme was proposed，and vibration transfer function analysis under the extracted dynamic excitation shows that the optimized limiter structure may significantly reduce the window frame shaking level during door closing.

Key Words：window frame shake；rigid-flexible coupling；vibration transfer function；multi-degreeof-freedom（MDOF） excitation;limiter optimization

汽车品质的重要指标，也是打造自主豪华品牌必须突破的核心技术之一[]。（剩余14546字）