Carbon fiber interlayer composite acoustic panel and preparation method and application thereof
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A technology of carbon fiber and sound insulation panels, which is applied in the field of carbon fiber sandwich composite sound insulation panels and its preparation, can solve the problems of limited designability and achieve obvious vibration isolation effects, good fatigue resistance, and flexible design effects
Pending Publication Date: 2018-10-26
CRRC IND INST CO LTD
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However, the designability of traditional sound insulation materials is limite
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[0029] Example 1 A carbon fiber sandwich composite sound insulation board
[0030] A carbon fiber sandwich composite sound insulation board includes: a carbon fiber upper surface skin layer, a carbon fiber lower surface skin layer, and at least one sound insulation and vibration isolation composite sandwich layer between them. see figure 1 .
[0031] Wherein, the thickness ratio of the carbon fiber upper surface skin layer, the sound insulation and vibration isolation composite sandwich layer, and the carbon fiber lower surface skin layer is 1:1.5:1, specifically 0.8cm, 1.2cm, and 0.8cm. Wherein, the upper and lower surface skin layers of the carbon fiber are obtained by laying a carbon fiber prepreg in a mold, heating and pressing and curing; wherein the carbon fiber prepreg is layered at an angle of 0° / 90° / ±45° / 0°.
[0032] The sound insulation and vibration isolation composite sandwich layer 2 is composed of a polymethacrylimide or polystyrene foam board foamed by mixing steel gr...
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[0034] Example 2 A method for preparing a carbon fiber sandwich composite sound insulation board
[0035] A preparation method of carbon fiber sandwich composite sound insulation board, including:
[0036] Step 1: Add 10% to 15% by mass of steel balls or steel sand to the polymethacrylimide or polystyrene foam material for mixing and foaming to obtain a sound insulation composite layer;
[0037] Step 2: Clean the mold and apply release agent in the mold;
[0038] Step 3: Calculate the number of layers and the thickness of the sound insulation composite layer used according to the thickness of the sound insulation board. The thickness of the sound insulation composite layer is about 1 / 3 of the thickness of the sound insulation board, and the carbon fiber prepreg is laid on the forming mold of the sound insulation board In, pre-embedded in the sound insulation interlayer;
[0039] Step 4: After closing the mold, put it in a hot autoclave for heating and pressurizing, the pressure is 1 at...
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Abstract
The invention relates to a carbon fiber interlayer composite acoustic panel and a preparation method and application thereof. The carbon fiber interlayer composite acoustic panel comprises a carbon fiber upper surface skin layer, a carbon fiber lower surface skin layer and at least one sound insulation and vibration insulation composite interlayer arranged between the carbon fiber upper surface skin layer and the carbon fiber lower surface skin layer; the sound insulation and vibration insulation composite interlayer is manufactured from a foaming foam board containing steel grit or steel balls. According to the sound insulation effect requirement, the thickness of the sound insulation composite interlayer is designed, the material preparation ratio of the sound insulation interlayer is changed, adjustment is performed, the specific sound insulation requirement is met by regulating the ratio of steel grit or steel balls to the foam layer, the more vibration insulation interlayers are embedded, the better the sound insulation effect is, the sound insulation material processing technology is simple and easy to implement, design can be performed according to the appearance, the high designability is achieved, and integrated molding can be achieved. The sound insulation material can be used for non-main-force-bearing protective components such as side walls, end walls, roofs and door plates of high-speed trains.
Description
technical field [0001] The invention relates to a carbon fiber interlayer composite sound insulation board, a preparation method and application thereof, and belongs to the application field of vibration and noise reduction technology. Background technique [0002] With the continuous acceleration of people's life rhythm, the requirements for the speed and comfort of vehicles are getting higher and higher. High-speed trains need to continuously increase speed and improve ride comfort. Due to the high speed of the high-speed train in operation, the noise and vibration generated by the aerodynamic force and wheel-rail friction inevitably enter the interior of the car body through the carriage, which greatly reduces the ride comfort. Therefore, sound insulation and vibration reduction is a major challenge in the design process of high-speed trains. [0003] In the design process of high-speed trains, the aerodynamic resistance is usually reduced by reducing wheel-rail friction...
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