The vehicle door seal strip has complex dynamic characteristics and is a critical component in the vibration and sound transmission of the vehicle system. However, in noise, vibration, and harshness (NVH) analysis, the seal strip is commonly simulated as a linear spring model, which results in inaccurate vibration and sound prediction. Thus, it is necessary to propose an alternative model, which allows characterising the complex dynamic behaviour of the seal strip accurately. In the present study, an overlay material model of rubber was encoded and embedded in ABAQUS with the UMAT subroutine. The overlay model was used in a seal strip finite element model validated by the quasi-static and dynamic measurements. By analysing the effects of frequency, amplitude, and pre-compression on the dynamic stiffness of a seal strip, an equivalent NVH model consisting of spring and damping elements was proposed. The proposed model was validated by comparing the simulated mode and vibration transfer function results with experimental ones. Using the spring model, the deviations of vibration transfer function with the experimental results are 37% and 8.3% at the first and second peaks, respectively. The corresponding deviations are only 4.6% and 2.6% employing the proposed model, demonstrating that the proposed model provides higher accuracy than the spring model. With the assist of the proposed model for vibration transmission analysis, a typical door vibration problem was successfully addressed, which proved the effectiveness of the equivalent model in engineering practice.

车门密封条具有复杂的动态特性，并且是车辆系统振动和声音传输的关键组成部分。但是，在噪声，振动和粗糙度（NVH）分析中，密封条通常被模拟为线性弹簧模型，这会导致振动和声音预测不准确。因此，有必要提出一种替代模型，该模型允许准确地表征密封条的复杂动态行为。在本研究中，使用UMAT子例程对橡胶的覆盖材料模型进行了编码并嵌入到ABAQUS中。在准静态和动态测量验证的密封条有限元模型中使用了覆盖模型。通过分析频率，振幅和预压缩对密封条动态刚度的影响，提出了由弹簧和阻尼元件组成的等效NVH模型。通过将仿真模式和振动传递函数结果与实验结果进行比较，验证了该模型的有效性。使用弹簧模型，振动传递函数与实验结果的偏差在第一个和第二个峰值分别为37％和8.3％。使用所提出的模型，相应的偏差仅为4.6％和2.6％，这表明所提出的模型提供了比弹簧模型更高的精度。借助所提出的振动传递模型，成功地解决了典型的门振动问题，证明了等效模型在工程实践中的有效性。通过将仿真模式和振动传递函数结果与实验结果进行比较，验证了该模型的有效性。使用弹簧模型，振动传递函数与实验结果的偏差在第一个和第二个峰值分别为37％和8.3％。使用所提出的模型，相应的偏差仅为4.6％和2.6％，这表明所提出的模型提供了比弹簧模型更高的精度。借助所提出的振动传递模型，成功地解决了典型的门振动问题，证明了等效模型在工程实践中的有效性。通过将仿真模式和振动传递函数结果与实验结果进行比较，验证了该模型的有效性。使用弹簧模型，振动传递函数与实验结果的偏差在第一个和第二个峰值分别为37％和8.3％。使用所提出的模型，相应的偏差仅为4.6％和2.6％，这表明所提出的模型提供了比弹簧模型更高的精度。借助所提出的振动传递模型，成功地解决了典型的门振动问题，证明了等效模型在工程实践中的有效性。在第一和第二峰值处，振动传递函数与实验结果的偏差分别为37％和8.3％。使用所提出的模型，相应的偏差仅为4.6％和2.6％，这表明所提出的模型提供了比弹簧模型更高的精度。借助所提出的振动传递模型，成功地解决了典型的门振动问题，证明了等效模型在工程实践中的有效性。在第一和第二峰值处，振动传递函数与实验结果的偏差分别为37％和8.3％。使用所提出的模型，相应的偏差仅为4.6％和2.6％，这表明所提出的模型提供了比弹簧模型更高的精度。借助所提出的振动传递模型，成功地解决了典型的门振动问题，证明了等效模型在工程实践中的有效性。