Composite sound insulation wallboard for dividing ship cabin

Abstract

A composite sound insulation wallboard for dividing a ship cabin comprises a lower panel. A rock wool layer is arranged on the upper side of the lower panel, and a micro-perforated plate is arranged on the upper side of the rock wool layer at an interval, a glass wool layer is installed on the upper side of the micro-perforated plate, an upper panel is installed on the top surface of the glass wool layer and is parallel to the lower panel, side panels are welded to the two sides of the upper panel and the lower panel respectively, the two sides of the rock wool layer and the glass wool layer are bonded to the side panels, and the two sides of the micro-perforated plate are welded to the side panels; the gap between the upper side of the rock wool layer and the micro-perforated plate formsan air layer. Based on the transmission and reflection mechanism in airborne sound wave propagation, the structural form that materials on the two sides are different in density and thickness is utilized to realize impedance mismatch, the structural shape of the low-density glass wool is maintained through the micro-perforated plate, the sound absorption effect at a low frequency of 1000 Hz or below is improved, and the total sound insulation of the structure is improved finally.

Description

technical field [0001] The invention relates to the technical field of noise control in ship cabins, in particular to a composite sound-insulating wall plate for dividing ship cabins. 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 were natural materials su...

AI Technical Summary

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.

Images