Automobile chassis vibration and noise reduction device based on acoustic black hole effect

Abstract

The invention discloses an automobile chassis vibration and noise reduction device based on an acoustic black hole effect, which belongs to the technical field of vibration and noise reduction. The automobile chassis vibration and noise reduction device based on the acoustic black hole effect comprises a plate structure, acoustic black hole structures and a nonlinear energy trap; the plate structure is a part of an automobile chassis; a plurality of acoustic black hole structures are cut on the plate structure; the distance between the upper surface and the lower surface of each acoustic black hole structure is gradually increased from the central axis of the acoustic black hole structure to the outer edge; and the lower portion of each acoustic black hole structure is connected to the nonlinear energy trap. The beneficial effects of the invention are as follows: the automobile chassis vibration and noise reduction device based on the acoustic black hole effect has a simple overall structure, has a good vibration energy gathering effect in the high, medium and low frequency bands, and can realize efficient gathering of vibration energy, which can not only meet the strength requirements of the acoustic black hole structures, but also realize efficient energy gathering and collection, and achieve a good vibration and noise reduction effect.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and noise reduction, in particular to an automobile chassis vibration reduction and noise reduction device based on the acoustic black hole effect. Background technique [0002] Automobiles have brought modern material civilization to the world, but at the same time they have also brought about environmental noise pollution. When the vehicle is running at high speed, the engine and high-speed airflow will produce dynamic noise. If you drive in this environment for a long time, it will affect people's body and psychology. As an important evaluation index of car ride comfort, car noise also reflects the design level and craft level of the car to a large extent. Therefore, it is particularly important for the vibration control of automobiles. [0003] The acoustic black hole effect mainly realizes the change of impedance by tailoring the thickness of the structure. When the elastic wave...

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a vehicle chassis vibration and noise reduction device based on the acoustic black hole effect, which is used to solve the vibration and noise reduction during driving, the lack of structural strength of the acoustic black hole, and the energy collection effect in the middle and low frequency range poor problem

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