A light-weight composite sound insulation board for ships and its manufacturing method

Abstract

The invention relates to a light-weight composite sound baffle for a ship and a manufacturing method. The light-weight composite sound baffle comprises a lower panel located at the lower part, whereina rock wool layer is arranged at the upper part of the lower panel reticular glass fiber cloth is arranged on the top surface of the rock wool layer; the light-weight composite sound baffle further comprises an upper panel located at the upper part; the upper panel is parallel to the lower panel; a glass wool layer is arranged on the bottom surface of the upper panel; reticular glass fiber clothis arranged on the bottom surface of the glass wool layer; the reticular glass fiber cloth of the rock wool layer and the reticular glass fiber cloth of the glass wool layer are arranged by keeping aninterval; an air layer is formed in the interval; side panels are welded on the two sides of the upper panel and the lower panel respectively; and a quadrilateral structure is defined by the upper panel, the lower panel and the two side panels. On a basis of a transmission and reflection mechanism in air sound wave propagation, impedance mismatch is achieved using a structural form with materialson the two sides having different densities and thicknesses; no connection is made in the middle of a structure; vibration transmission is reduced; and sound insulation of the structure is further improved.

Description

technical field [0001] The invention relates to the technical field of ship cabin noise control, in particular to a lightweight composite sound insulation board for ships and a manufacturing method thereof. Background technique [0002] Ship, the general term for all kinds of ships. Ships are means of transportation that can sail or berth in waters for transportation or operations, and have different technical performances, equipment and structural types according to different requirements for use. [0003] A ship is a man-made means of transportation that primarily operates in geographical waters. The interior mainly includes accommodation space, support structure and drainage structure, and has a propulsion system that utilizes external or self-contained energy. The appearance is generally a streamlined envelope that is conducive to overcoming fluid resistance. The materials are constantly updated with the advancement of science and technology. In the early days, they we...

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Problems solved by technology

[0005] At present, 25mm and 50mm composite rock wool board materials are used for cabin partitions on the market. The structural form is rock wool core material sandwiched between steel plates on both sides. It is characterized by low price and mature technology; the disadvantage is that the density of rock wool used is relatively high. Large, about 150~160kg / m 3 ; The sound insulation value of ordinary 50mm composite rock wool board is about 30-35dB, which cannot meet the requirement of 35dB for the sound insulation of the cabin and the cabin of MSC.337 (91)

[0006] At present, materials such as polyimide, phenolic materials, long glass fiber, flame-retardant nylon, and aramid honeycomb have been widely used in buildings, ground transportation and other fields, but the fire resistance performance cannot meet the requirements of marine B15 grade.

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