Noise reduction interior trim system for special vehicle cab

Abstract

The invention relates to a noise reduction interior system for a special vehicle cab. The system comprises any one or a combination of more of a sound absorption interior structure, a high-strength multi-layer composite floor structure and an engine compartment sound absorption and insulation structure. The roof sound absorption structure sequentially comprises a first sound absorption material and a first protective surface layer from inside to outside, and the first sound absorption material is attached to the roof. The high-strength multi-layer composite floor structure sequentially comprises floor leather, a damping composite sandwich structure and a second sound absorption material from top to bottom, and the second sound absorption material is attached to the ground. The engine compartment sound absorption and insulation structure sequentially comprises a third sound absorption material, a damping steel plate, a fourth sound absorption material and a second protective surface layer from inside to outside, the third sound absorption material is attached to the inner side of the compartment plate, and the fourth sound absorption material is attached to the outer side of the compartment plate. Compared with the prior art, the noise reduction frequency range is wide, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of vehicle noise control, in particular to a noise-reducing interior decoration system for a cab of a special vehicle. Background technique [0002] At present, most of the cabs of special vehicles have the problem of poor noise environment to varying degrees, or there are abnormal noises at a certain speed, or the average value of noise is too large under most working conditions, and there are many reasons for this situation of. For special vehicles, the engine power is large, and most of them are exposed to the outside and close to the cab, resulting in too much noise directly transmitted to the cab through the air; there are many axles and mounts, and the modal matching of the whole vehicle is not considered in-depth and meticulous. ; The design of the cab system is unreasonable, the structural mode and the acoustic cavity mode are prone to resonance and roaring, and there is also a lack of experience in...

AI Technical Summary

Problems solved by technology

Domestic research objects in the field of noise are mostly passenger cars, but there are few studies on the NVH performance of special vehicles. There is still a certain gap between the vibration and noise levels of domestic related vehicles, which has become a constraint on the development of special vehicle body structures. Limiting factor

And being in a noisy environment will cause the occupants to experience mental stress, fatigue, irritability, and inattention. Long-term exposure to a noisy environment is more likely to cause dizziness, distraction, nausea and other adverse reactions, and even cause heart and brain damage. Vascular disease

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