A noise reduction and sound insulation large bottom plate comprises a lower plate, an upper plate laid on the lower plate and a sound absorption layer clamped between the lower plate and the upper plate, the lower plate and the upper plate are both foam sandwich plates, and the noise reduction and sound insulation large bottom plate is characterized in that the upper surface of the lower plate is provided with convex ribs protruding upwards, the edge of the upper plate is provided with a turnup folded downwards by 90 degrees, and the lower surface of the upper plate and the turnup are bonded with the convex ribs respectively. A cavity is formed between the upper plate and the lower plate, and the sound absorption layer is filled in the cavity. The reliability of noise reduction and sound insulation is guaranteed, the combination of the foam sandwich board and the sound absorption layer effectively increases the thickness and reduces the density and weight, the matching of the convex ribs of the lower board and the turnup edges of the upper board effectively improves the overall bending rigidity, vibration and drooping of the large bottom board in the loading operation process are effectively avoided, and the large bottom board with high rigidity, low density, large thickness and high sound insulation performance is formed. The large bottom plate is light in weight and higher in weighted sound insulation amount, and the use requirement of the large bottom plate of the straddle type monorail vehicle is met.
降噪隔音大底板,包括下板、铺设在下板上的上板和夹在下板与上板之间的吸音层,下板与上板均为泡沫夹芯板,其特征在于:所述的下板上表面具有向上凸起的凸筋,上板边缘上具有向下翻折90度的翻边,上板下表面和翻边分别与凸筋粘接,在上板和下板之间形成空腔,吸音层填充在空腔中。本发明保证降噪隔音的可靠性,泡沫夹芯板与吸音层的组合有效增大厚度并减少密度和重量,下板的凸筋与上板的翻边的配合有效提高整体弯曲刚度,有效避免装车运行过程中大底板发生颤动、下垂,形成刚度大、密度低,厚度大,重量轻、计权隔声量更高的大底板,满足跨座式单轨车大底板的使用需求。
Noise-reduction and sound-insulation large bottom plate
降噪隔音大底板
2023-12-08
Patent
Electronic Resource
Chinese
IPC: | B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B61C Lokomotiven , LOCOMOTIVES / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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