A cab design method based on cab sound insulation analysis

Abstract

The present invention relates to a cab design method based on cab sound insulation analysis, comprising the following steps: 1) establishing a CAD model of the cab assembly, and dividing it into grids to establish a finite element model of the cab assembly; 2) ) Based on the finite element model of the cab assembly, the sound field inside the cab and the sound field outside the cab are established; 3) The structural finite element model of the sealing strip is established according to the shape of the sealing strip in the current design drawing, and the sealing strip is compressed with a set amount of compression Perform non-linear static compression; 4) Establish a sound-solid-sound three-domain coupling model; 5) Calculate the sound insulation of the cab; 6) Determine whether the sound insulation of the current cab meets the design requirements, and if so, use the current design drawings as the cab Output the final structure, if not, modify the shape and compression of the sealing strip in the design drawing, and return to step 3). Compared with the prior art, the invention has the advantages of reducing the interior noise of the cab, improving the sound insulation and sealing performance of the cab, and the like.

Description

technical field [0001] The invention relates to a mechanical structure design method, in particular to a cab design method based on the analysis of cab sound insulation. Background technique [0002] With the advancement of technology and the continuous improvement of the level of industrialization, the application of construction machinery is very extensive in all walks of life. People's requirements for construction machinery are getting higher and higher, not only in terms of operating efficiency and reliability, but also in comfort and vibration and noise control of construction machinery. Under such a background, the noise problem of construction machinery has been generally paid attention to by various heavy industry enterprises. Noise pollution, together with water pollution and air pollution, has become one of the three major environmental problems worldwide. With the rapid development of pillar industries such as real estate and high-speed rail, construction machi...

AI Technical Summary

Problems solved by technology

Excessive noise can also cause damage to the human auditory system. If the staff is exposed to a noise environment of 86dB(A) for a long time, their hearing will be damaged; while noise above 90dB(A) can cause deafness or severe deafness; The human ear's short-term tolerance limit for strong noise is about 125dB(A)

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