Micro-perforating orthogonal distributed rectangular pipe clamping core sound and energy absorbing composite structure

Abstract

The invention discloses a micro-perforating orthogonal distributed rectangular pipe clamping core sound and energy absorbing composite structure applied to noise reduction of armored vehicles, tanks and the like. The sound and energy absorbing composite structure comprises an upper panel, first-layer horizontally arranged rectangular pipes, a vertically arranged rectangular pipe, second-layer horizontally arranged rectangular pipes and a lower panel. All components are welded or bonded to form an integrated structure. The upper panel, the first-layer horizontally arranged rectangular pipes andthe second-layer horizontally arranged rectangular pipes are provided with sound absorbing holes, and the opening direction is perpendicular to a plate surface. The sound absorbing holes and a structural internal cavity constitute a Helmholtz resonator absorbing noise. During use, the upper panel is mounted towards a noise source, and the lower panel is away from the noise source. The micro-perforating orthogonal distributed rectangular pipe clamping core sound and energy absorbing composite structure is simple in structure, convenient to manufacture, excellent in sound absorbing performanceand capable of bearing and resisting certain explosion shock wave damage, has the characteristics of being low in weight, and has practical engineering application value.

Description

technical field [0001] The invention relates to the field of noise-reducing structure design for armored vehicles and tanks, which can not only absorb noise, but also play the role of carrying and absorbing the energy of explosion shock waves. Specifically, it is a sound-absorbing and energy-absorbing compound with rectangular tube sandwich with micro-perforated orthogonal arrangement. structure. Background technique [0002] The noise environment in the interior spaces of armored vehicles and tanks is harsh. Long-term rides can cause serious discomfort in the physical and mental states of the occupants, which in turn distracts their attention and reduces the efficiency of dealing with external emergencies. The traditional micro-perforated sound-absorbing panel is made by drilling small holes with a diameter of less than 1mm on a thin plate. The sound absorption peak is small, and it cannot achieve good sound absorption effect in a wide frequency band. In addition, in the c...

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Problems solved by technology

[0003] In order to solve the problems of poor sound absorption effect and insufficient rigidity and strength of the existing micro-perforated sound-absorbing panels, the present invention provides a sound-absorbing and energy-absorbing composite structure of rectangular tube sandwiches with micro-perforated orthogonal arrangement, which has simple structure, convenient processing, and high quality. Light, can absorb noise and bear and resist certain explosion shock wave damage

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