Bamboo-shaped thin-wall pipe structure easy-to-assemble multi-directional self-locking energy absorbing system

Abstract

The invention discloses a bamboo-shaped thin-wall pipe structure easy-to-assemble multi-directional self-locking energy absorbing system. A bamboo-shaped thin-wall pipe structure is made of a metal material. A combined structure is composed of a plurality of imitative-bamboo thin-wall pipe sub-structures which are staggered and stacked. The cross section, in an axial direction, of each imitative-bamboo thin-wall pipe sub-structure is a circle of which the size changes periodically. The structure is designed by imitating the special shape structure of Buddha bamboo, self-locking among all the bamboo-shaped sub-structures in a multi-directional impact process in a space is achieved, the defects that a restraint device needs to be installed outside a traditional energy absorbing system or a connecting device needs to be machined inside the traditional energy absorbing system are overcome, the time cost and manpower and material resource cost of assembling and disassembling are greatly reduced, the defect that a dumbbell-shaped thin-wall pipe structure can only handle with impact in a single specific direction for keeping self-locking is overcome, the impact energy is converted to plastic dissipation and friction dissipation of the structure through a self-locking effect, thus the impact energy can be efficiently absorbed, and the rebound influence of an impact object can be reduced. According to the energy of the impact object and the actual field conditions, the number of stacking layers of the combined structure and the number of bamboo-shaped thin-wall pipe sub-structures which are put on each layer can be adjusted freely, the arrangement direction of the bamboo-shaped thin-wall pipe combined structure is changed, the flexibility is high, and the utilization ratio of materials can be improved.

Description

technical field [0001] The present invention relates to the technical field of impact-resistant energy-absorbing systems, in particular to a multi-directional self-locking energy-absorbing system with a bamboo-shaped thin-walled tube structure that is easy to assemble. The energy-absorbing system is suitable for impact-resistant and shock-absorbing protection of road traffic, spacecraft Impact energy absorption protection for recycling and airdropped items, or anti-shock energy absorption fields such as anti-explosion impact protection for national defense and military. Background technique [0002] With the progress of economy and the development of science and technology, transportation vehicles such as airplanes, high-speed rails, and vehicles are all developing in the direction of light weight and speed, which greatly facilitates people's lives, but also increases the risk of accidents such as collisions, impacts, and explosions. Risks and Hazards. The impact accident o...

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Problems solved by technology

[0004] However, in the absence of inter-pipe connection and boundary constraints, the circular pipe system is prone to generate lateral splash under impact load, which not only reduces the energy absorption efficiency, but also may cause secondary damage

In engineering, the method of welding or bolting the round pipes, or installing a fixed baffle on the outer boundary of the round pipe system is usually used to overcome this defect, but these two methods increase the time cost and cost of installation to varying degrees. The cost of manpower and material resources reduces the timely response ability of the circular pipe system to deal with sudden impact accidents, especially in emergency rescue and other situations, which is not ideal

In order to make up for the shortcomings of the circular tube system, a self-locking structure of dumbbell-shaped thin-walled tubes was proposed before. This system can be formed by staggered arrangement of dumbbell-shaped thin-walled tubes, without the need for external installation of restraint devices or internal processing of connection devices. The system can only respond to the impact of a specific single direction in space and maintain self-locking

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