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Periodic damping structure for automobile and absorption vibration denoise method thereof

A damping structure, vibration reduction and noise reduction technology, applied in the direction of spring/shock absorber, vibration suppression adjustment, mechanical equipment, etc., can solve the problems of cost increase, inconvenient processing, complex structure, etc., and achieve long service life and easy processing and molding , low-cost effect

Inactive Publication Date: 2009-10-07
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent effectively expands the area of ​​the damping material to withstand shear deformation, it uses a three-layer structure of the connecting body, damping layer, and constraining layer. At the same time, ribs must be provided on the connecting body and the constraining body. Complicated, which brings inconvenience to the processing and increases the cost

Method used

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  • Periodic damping structure for automobile and absorption vibration denoise method thereof
  • Periodic damping structure for automobile and absorption vibration denoise method thereof
  • Periodic damping structure for automobile and absorption vibration denoise method thereof

Examples

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Effect test

Embodiment 2

[0044] Example 2: Application of vehicle body roof vibration reduction

[0045] In this embodiment, the substrate to be damped is the roof of the vehicle body. Along the length direction of the ceiling, paste the damping sheet periodically and parallel on the roof of the vehicle body. Since the width B of the base plate is 94 cm, the width a of the damping sheet is 4.5 cm, and its length d should be equal to or slightly smaller than the width B of the base plate, which is 84 cm. The relative interval width ( Center distance of damping sheet) is 17.5cm.

[0046] The difference between this embodiment and Embodiment 1 is that the base plate 1 in Embodiment 1 is in a state of free suspension, while in this embodiment the roof is in a state of four sides being fixed. When the vehicle is running, the roof of the vehicle body vibrates due to engine vibration, road excitation, and air friction. After pasting the periodic damping structure, part of the vibration energy of the roof o...

Embodiment 3

[0047] Example 3: Application of vibration reduction on the rear seat floor of the vehicle body

[0048] In this embodiment, the substrate to be damped is the rear seat floor of the vehicle body. Along the length direction of the rear seat floor, the damping sheet 2 is periodically pasted on the rear seat floor in parallel. The difference between this embodiment and Embodiment 1 is that the shape of the rear seat floor of the vehicle body is irregular, restricted by the shape of the base plate 1, the length of the damping sheet 2 is different, and in order to facilitate its installation, a damping material is used between the damping sheets 2 The connection, the width a of the damping plate, the spacing distance, and the number of cycles must meet the requirements.

Embodiment 4

[0049] Example 4: Application of Vibration Damping on the Rear Floor of the Vehicle Body

[0050] Such as Figure 5 As shown, the damping substrate 1 in this embodiment is the rear floor of the vehicle body, and the damping sheet 2 is periodically pasted on the rear seat floor in parallel along the length direction of the rear floor. The difference between this embodiment and Embodiment 1 is that the rear floor area of ​​the vehicle body is small, and only three cycles of the damping structure can be applied after meeting the size requirements of the damping sheet 2 .

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Abstract

The present invention provides a periodic damping structure for automobile and absorption vibration denoise method thereof. A plurality of damping plates are periodic pasted on a substrate according with certain relative interval, the absorption vibration denoise method is a periodic damping structure pasting method. Parameters need determining includes a damping plates pasting position and a damping plates self physical dimension: length, width, thickness and shape feature, and relative position among damping plates. Length of the damping plates does not go beyond required absorption vibration part dimension, width of the damping plates is 1cm-10cm, thickness of the damping plates is 2-10 times of the substrate thickness, relative interval distance between centres of the damping plates is 10cm-50cm, the damping plates number is larger than or equal to three periodic times. The structure processes innovate to the paste method of damping material for automobile according with phonon crystal band-gap mechanism and can reach preferable vehicle absorption vibration denoise effect. The structure has advantages of simple and reasonable structure, easy to process forming, convenient to install, low cost, long service life and obvious absorption vibration denoise effect.

Description

technical field [0001] The invention relates to a periodic damping structure for vehicles and a method for reducing vibration and noise thereof, and belongs to the field of vehicle NVH (Noise, Vibration and Harshness). Background technique [0002] The damping structure refers to the structure that combines the damping material with the component to dissipate the amount of vibration. There are usually several basic forms as follows: ① free damping layer structure. That is, a layer of high internal damping material is firmly bonded on the base plate of the vibrating member. The loss factor of this structure is related to the thickness ratio of the damping layer and the base plate and their elastic modulus ratio. The thickness of the damping layer is generally preferably 1-4 times the thickness of the base plate. ② Interval damping layer structure. It is to add a spacer layer (generally a rigid honeycomb structure) that can withstand a large shear force between the damping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/00
Inventor 陈源周明刚黄涛周敬东孙国栋张铮陈辉张三强周小强戚得众王元芳余艳艳黄英
Owner HUBEI UNIV OF TECH
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