ویژگی های سختی و لرزش صدا خودرو
Abstract
1-Introduction
2-NVH Robustness Analysis Based on Subjective Rating Attenuation
3-NVH Robustness Example Analysis of High Mileage Automobile Based on Subjective Rating Attenuation
4-Conclusion
5-Acknowledgement
6-References
Abstract
This paper explains the concept of high mileage automobile NVH(Noise Vibration and Harshness ) robustness. Based on the NVH characteristic subjective rating method, a quantitative analysis and evaluation method for NVH robustness of high mileage automobile is proposed. By using the subjective rating attenuation method of high mileage automobile NVH robustness and combine the actual parameters of three different types of cars, According to the calculation and analysis of the decline and attenuation of subjective rating attenuation method, the NVH robustness characteristics and change rules of three different types of cars at different mileage stages are obtained, which provides a reference for the NVH robustness analysis of high mileage automobile and the development of automobile NVH.
Introduction
The current research on the NVH characteristics of automobile is mainly focused on the vibration, noise and comfort of the new automobile, but less research on the vibration, noise and comfort of high mileage automobile after use. With the gradual increase of the mileage of the automobile, the automobile parts, components and the performance of the automobile must be attenuated to a certain extent. The attenuation of its comprehensive performance will inevitably lead to the gradual reduction of the NVH characteristics of the high mileage automobile. High mileage automobile NVH robustness refers to the holding capacity of original acoustic quality in the automobile, when the vehicle is purchased by the user and will be influenced by various factors in the process of use, from the gradual increase of the mileage from zero to a mileage1,2,3 . This paper proposes a quantitative analysis and evaluation method based on subjective rating attenuation for high mileage automobile NVH, and studies the robustness of automobile NVH characteristics.