Cab design method based on cab sound reduction index analysis

Abstract

The invention relates to a cab design method based on a cab sound reduction index analysis. The cab design method comprises the following steps: (1) establishing a CAD (Computer-Aided Design) model of a cab assembly, carrying out mesh generation on the CAD model, and establishing a finite element model of the cab assembly; (2) based on the finite element model of the cab assembly, establishing a cab internal sound field and a cab external sound field; (3) according to the shape of a sealing strip in a current design drawing, establishing a finite element model of the sealing strip structure, and carrying out nonlinear static compression on the sealing strip according to a set amount of compression; (4) establishing a sound-solid-sound three-domain coupling model; (5) computing the sound reduction index of the cab; (6) judging whether the sound reduction index of the current cab meets the design requirement, if yes, taking the current design drawing as the final structure output of the cab, and otherwise modifying the shape and the amount of compression of the sealing strip in the design drawing, and returning to the step (3). Compared to the prior art, the cab design method disclosed by the invention has the advantages of reducing the internal noise of the cab, increasing the sound reduction index of the cab, improving the sealing performance, 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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