A method for calculating the transmission loss of a door subsystem equipped with a weather strip
A technology for transmission loss and sealing strips, applied in design optimization/simulation, sustainable transportation, special data processing applications, etc., can solve problems such as difficulty in improvement, high cost, and long design cycle, and achieve high engineering practical value and easy implementation , the effect of fast calculation speed
Inactive Publication Date: 2020-02-21
TONGJI UNIV +1
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On the one hand, it is possible to reduce the size of the noise source by changing the structure and shape of the object based on the mechanism of noise generation, but this usually leads to expensive costs, long design cycles, and difficulties in improving the object after it is formed.
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[0044] The application will be described in further detail below in conjunction with the accompanying drawings.
[0045] figure 1 A flow chart of a method for calculating the transmission loss of a sealing strip according to the present application is shown.
[0046] The method includes step S11, step S12, step S13 and step S14. Specifically, in step S11, the finite element model of the sealing strip and the acoustic cavity is established based on the first engineering software; in step S12, the material properties and boundary conditions of the sealing strip and the acoustic cavity are set, and modal analysis is performed; in step S13 , establish the FE-SEA hybrid model of the sealing strip and calculate its transmission loss; in step S14, establish the SEA model of the vehicle door, and analyze the influence of the acoustic performance of the sealing strip on the transmission loss of the vehicle door.
[0047] The present application will be further described in detail bel...
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The invention aims to propose a method for calculating transmission loss of a vehicle door subsystem equipped with seal strips. Compared with the prior art, the method comprises the steps of firstly, building finite element models of the seal strips and an acoustic cavity based on first engineering software, setting material attributes and boundary conditions of the seal strips and the acoustic cavity, and performing modal analysis; secondly, building an FE-SEA hybrid model of the seal strips and calculating transmission loss of the seal strips; and thirdly, building a vehicle door SEA model, and analyzing the influence of the acoustic performance of the seal strips on transmission loss of a vehicle door, thereby quickly and accurately obtaining high-frequency transmission loss in the seal strips. Furthermore, the design of the seal strips is guided by performing comparative analysis on the first seal strip, the second seal strip and the transmission loss during simultaneous mounting of the two seal strips, and considering the influence of the acoustic performance of the seal strips on the transmission loss of the vehicle door under three different conditions.
Description
technical field [0001] The present application relates to the field of acoustic calculation of sealing components, in particular to a technique for calculating the transmission loss of a door subsystem equipped with a sealing strip. Background technique [0002] Noise sources outside the car can be transmitted into the car from many sources, such as the floor, doors and so on. On the one hand, it is possible to reduce the size of the noise source by changing the structure and shape of the object based on the mechanism of noise generation, but this usually leads to expensive costs, long design cycles, and difficulties in improving the object after it is formed. On the other hand, acoustic packaging materials and seals can be designed on the sound transmission path, and are widely used in automobiles because of their low cost and easy implementation. For seals, their acoustic performance has a great influence on the transmission loss of the door system and even the sound pres...
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IPC IPC(8): G06F30/23
CPCG06F30/23Y02T90/00
Inventor 吴宪邵建旺王成邓国明唐小康王亚波郑福荣
Owner TONGJI UNIV