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Structure for suppressing cavity resonance in automobile tire based on phononic crystal noise reduction theory

A phononic crystal, inner cavity technology, applied in vehicle parts, tire parts, transportation and packaging, etc., can solve the problems of dynamic imbalance and high cost, and achieve the effect of small additional weight and less damage.

Pending Publication Date: 2018-12-21
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of reducing the resonance noise of the tire cavity, the current main solution is to add sound-absorbing materials to the cavity, but due to the disadvantages of high cost, additional mass, and easy dynamic imbalance, it also brings additional maintenance costs

Method used

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  • Structure for suppressing cavity resonance in automobile tire based on phononic crystal noise reduction theory
  • Structure for suppressing cavity resonance in automobile tire based on phononic crystal noise reduction theory
  • Structure for suppressing cavity resonance in automobile tire based on phononic crystal noise reduction theory

Examples

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Embodiment example 1

[0026] Implementation case 1: Based on the above design ideas, this case designs a phonon crystal structure in which the elastic cylinder is evenly distributed along the circumference. The material is silicone rubber. The baseband is 1100mm long, 31mm wide and 1mm thick. The cylinder has a diameter of 5mm and a height of 50mm. The number of cycles arranged along the width direction of the cylinder is 5 with a pitch of 1 mm, and the number of cycles arranged along the length direction of the tape is 35 with a pitch of 26 mm. Fix the phononic crystal structure in the deep groove of the rim with locks along the outer contour circumference of the deep groove of the rim, and surround the top of the phononic crystal structure with a plastic restraint belt that is equal in width or slightly wider than the phononic crystal structure. The elastic body cylinder is bent in the same direction and restrained under the restraint belt, and the restraint belt is connected with the lock firs...

Embodiment example 2

[0027] Implementation Case 2: Based on the above design ideas, this case designs a phonon crystal structure in which elastomer cylinders are distributed along the circumferential region, and all elastomer cylinders are symmetrical about the center of the wheel, as shown in Image 6 shown. The material is polyurethane. The baseband is 1200mm long, 22mm wide and 2mm thick. The cylinder has a diameter of 2mm and a height of 40mm. The number of cylinders arranged along the width direction is 5, the interval is 2mm, the number of periods arranged in each group of cylinders along the strip length direction is 10, the interval is 5mm, and 4 groups of cylinders are evenly distributed along the strip length direction. Fix the phononic crystal structure in the deep groove of the rim with locks along the outer contour circumference of the deep groove of the rim, and surround the top of the phononic crystal structure with a plastic restraint belt that is equal in width or slightly wider...

Embodiment example 3

[0028]Implementation Case 3: Based on the above design ideas, this case designs a phonon crystal structure in which elastomer cylinders are distributed along the circumferential area, and all elastomer cylinders are symmetrical about the center of the wheel, and there are elastomers of different diameters and lengths in the phonon crystal structure cylindrical, such as Figure 8 , 9 shown. The material is EPDM rubber. The baseband is 1000mm long, 22mm wide, and 0.5mm thick. Arrange cylinders of two geometries. The diameter of the thin cylinder is 2mm, the height is 40mm, and the number of periods arranged along the width direction is 5, and the interval is 2mm. The diameter of the thick cylinder is 4mm, the height is 26mm, and the number of periods arranged along the width direction is 4, and the interval is 1mm. The number of cycles arranged in each group of cylinders along the length of the belt is 10, and the thick and thin cylinders are arranged alternately with a spa...

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Abstract

The invention discloses a structure for suppressing cavity resonance in automobile tire based on phononic crystal noise reduction theory, which is characterized in that the structure comprises a longrectangular rubber or plastic base band, and rubber cylinders are arranged on one side of the base band in a rectangular array. Wherein the rubber base belt and the rubber cylinder are manufactured asa whole. At that time of installation, the tire is fixedly connecte in the deep groove of the wheel rim, restrained by a restraining belt, the tire is load into one side of the tire lip, the restraining belt is cut out, and then the tire lip is loaded into the other side of the tire lip; To remove the tire, remove one lip, restrain the rubber cylinder with the restraining strap, and then remove the other lip. Compared with adding common sound-absorbing material, it is not easy to damage in tire loading and unloading. By optimizing the parameters and layout, the additional weight can be reduced, and the cavity resonance noise of tire in the range of 200-300Hz can be effectively suppressed. In order to ensure the dynamic balance, the layout of the rubber cylinder on the base belt should satisfy the symmetry of the structure and ensure that the rubber cylinder is symmetrical about the center of the wheel center after it is installed in the deep groove of the wheel rim.

Description

technical field [0001] The invention proposes a structure for suppressing cavity resonance in an automobile tire based on a phonon crystal noise reduction theory, which specifically relates to the design of a phonon crystal noise reduction structure for controlling resonance in a cavity in an automobile tire, and belongs to the technical field of automobiles. technical background [0002] The NVH characteristics of automobiles are an important indicator of vehicle comfort. With the continuous reduction of vibration and noise in automobile power systems and the promotion of new energy vehicles, tire cavity resonance noise has become a prominent problem affecting vehicle NVH performance. When the car is running, the uneven contact between the road surface and the tread excites the wide-frequency vibration of the tire, which causes the cavity system formed between the rim of the wheel and the inner surface of the tire to resonate, and a standing wave is formed in the cavity, whi...

Claims

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Application Information

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IPC IPC(8): B60C19/00
CPCB60C19/002
Inventor 刘献栋王宗南单颖春何田
Owner BEIHANG UNIV
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