{"title":"基于辛几何方法的汽车驾驶室降噪设计与仿真","authors":"Ziyu Zheng","doi":"10.5220/0008870401020107","DOIUrl":null,"url":null,"abstract":"The noise caused by the vibration of the car body will reduce the comfort of the car. In order to reduce the indoor noise, through the experimental modal analysis of the cab, the change of natural frequency and basic mode of vibration is obtained. It is found that when the frequency is 120.44 Hz, the cab noise has the greatest impact. Through symplectic geometric analysis and panel acoustic contribution analysis, it is found that the cab panel has the greatest influence on the sound pressure near the ear of the roof driver. In order to solve the above problems, the noise reduction method of the cab roof using stiffened panels and the sound radiation theory is used to simulate the noise reduction effect of the improved cab. It is found that the sound pressure of the improved cab is significantly reduced, the low-frequency noise is effectively suppressed, and the comfort of the car is improved.","PeriodicalId":186406,"journal":{"name":"Proceedings of 5th International Conference on Vehicle, Mechanical and Electrical Engineering","volume":"27 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Design and Simulation of Vehicle Cab Noise Reduction based on Symplectic Geometry Method\",\"authors\":\"Ziyu Zheng\",\"doi\":\"10.5220/0008870401020107\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The noise caused by the vibration of the car body will reduce the comfort of the car. In order to reduce the indoor noise, through the experimental modal analysis of the cab, the change of natural frequency and basic mode of vibration is obtained. It is found that when the frequency is 120.44 Hz, the cab noise has the greatest impact. Through symplectic geometric analysis and panel acoustic contribution analysis, it is found that the cab panel has the greatest influence on the sound pressure near the ear of the roof driver. In order to solve the above problems, the noise reduction method of the cab roof using stiffened panels and the sound radiation theory is used to simulate the noise reduction effect of the improved cab. It is found that the sound pressure of the improved cab is significantly reduced, the low-frequency noise is effectively suppressed, and the comfort of the car is improved.\",\"PeriodicalId\":186406,\"journal\":{\"name\":\"Proceedings of 5th International Conference on Vehicle, Mechanical and Electrical Engineering\",\"volume\":\"27 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of 5th International Conference on Vehicle, Mechanical and Electrical Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5220/0008870401020107\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 5th International Conference on Vehicle, Mechanical and Electrical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5220/0008870401020107","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design and Simulation of Vehicle Cab Noise Reduction based on Symplectic Geometry Method
The noise caused by the vibration of the car body will reduce the comfort of the car. In order to reduce the indoor noise, through the experimental modal analysis of the cab, the change of natural frequency and basic mode of vibration is obtained. It is found that when the frequency is 120.44 Hz, the cab noise has the greatest impact. Through symplectic geometric analysis and panel acoustic contribution analysis, it is found that the cab panel has the greatest influence on the sound pressure near the ear of the roof driver. In order to solve the above problems, the noise reduction method of the cab roof using stiffened panels and the sound radiation theory is used to simulate the noise reduction effect of the improved cab. It is found that the sound pressure of the improved cab is significantly reduced, the low-frequency noise is effectively suppressed, and the comfort of the car is improved.
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