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Windmill-shaped thin-walled tube structure energy absorption system capable of achieving multi-dimensional self-locking and easy to assemble

A windmill-shaped, thin-walled tube technology is applied in the field of energy absorption systems, which can solve the problems of increasing installation time and labor costs, and achieve the effects of good flexibility and adjustability, less time-consuming, and easy disassembly and installation.

Active Publication Date: 2019-09-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods increase the installation time and labor costs to varying degrees, and cannot respond to emergencies quickly and conveniently.
In order to solve this shortcoming of the circular tube system, a dumbbell-shaped thin-walled tube structure has been proposed before. This system can reduce the time and labor cost of disassembly and assembly, but it can only deal with impact in a specific direction

Method used

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  • Windmill-shaped thin-walled tube structure energy absorption system capable of achieving multi-dimensional self-locking and easy to assemble
  • Windmill-shaped thin-walled tube structure energy absorption system capable of achieving multi-dimensional self-locking and easy to assemble
  • Windmill-shaped thin-walled tube structure energy absorption system capable of achieving multi-dimensional self-locking and easy to assemble

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Analysis of the side load of a multi-dimensional self-locking windmill-shaped thin-walled tube structure that is easy to assemble and an energy-absorbing system

[0035] The energy-absorbing effect of the installed corresponding multi-dimensional self-locking energy-absorbing system under lateral load is calculated by simulation. By staggering 36 windmill-shaped thin-walled tube sub-structures to form a combined structure of 6 rows and 6 columns. The parameters of a single substructure are as follows: the radius of the thin-walled circular tube r=10mm, the width of the narrow thin plate w=20mm, the chamfering radius p=10mm, the thickness t=0.5mm, and the axial length l=367mm. ABAQUS / Explicit is used for dynamic simulation.

[0036] Set the speed of the impacting object as v=72km / h=20m / s, the mass of the impacting object m=133kg, and calculate the impact energy E=1 / 2mv 2 =1 / 2×133×20 2 J=2.66×10 4 J. According to the numerical simulation, the force-displac...

Embodiment 2

[0037] Example 2: Analysis of the longitudinal load of a multi-dimensional self-locking windmill-shaped thin-walled tube structure that is easy to assemble and absorb energy

[0038] The energy-absorbing effect of the installed corresponding multi-dimensional self-locking energy-absorbing system under longitudinal load is calculated by simulation. By staggering 36 windmill-shaped thin-walled tube sub-structures to form a combined structure of 6 rows and 6 columns. The parameters of a single substructure are as follows: the radius of the thin-walled circular tube r=10mm, the width of the narrow thin plate w=20mm, the chamfering radius p=10mm, the thickness t=0.5mm, and the axial length l=367mm. ABAQUS / Explicit is used for dynamic simulation.

[0039] Set the speed of the impacting object as v=144km / h=40m / s, and the mass of the impacting object as m=266kg. Calculated total impact energy E=1 / 2mv 2 =1 / 2×266×40 2 J=2.128×10 5 J. According to the numerical simulation, the forc...

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Abstract

The invention discloses a windmill-shaped thin-walled pipe structure energy absorption system capable of achieving multi-dimensional self-locking and easy to assemble. The energy absorption system is of a windmill-shaped thin-wall pipe structure made of metal materials, the combined structure is formed by arranging a plurality of windmill-shaped thin-wall pipe sub-structures in a staggered mode, each windmill-shaped thin-wall pipe sub-structure is composed of four blades, and the section shape of each blade is formed by connecting two parallel straight lines through an arc with the central angle of 270 degrees. The outer contour of the windmill is designed; self-locking between the adjacent windmill-shaped sub-structures in the impact process in any direction in the space is realized; and the defect that a restraint device needs to be installed outside or a connecting device needs to be machined inside in a traditional energy absorption system is overcome.The time cost for disassembly and assembly and the labor and material cost are greatly reduced, the defect that a traditional dumbbell-shaped self-locking pipe energy absorption system can only cope with impact in a specific single direction is overcome, the impact energy is converted into elastic deformation and plastic dissipation of the structure through the self-locking effect between the structures, and the impact energy can be effectively absorbed. The number and the layer number of windmill-shaped thin-walled pipe sub-structures placed on each layer of the composite structure can be freely adjusted according to the energy of impact objects and the actual situation of a site, and the material utilization rate is simply and effectively increased.

Description

technical field [0001] The present invention relates to the technical field of energy-absorbing systems, more precisely, relates to a multi-dimensional self-locking windmill-shaped thin-walled tube structure and easy-to-assemble energy-absorbing structure. The energy-absorbing system is used in aerospace, transportation and important facilities. It is of great significance in terms of anti-collision and shock absorption. Background technique [0002] In recent years, with the rapid development of transportation tools such as aircraft, vehicles and ships, safety accidents caused by collisions and impacts have also increased greatly, seriously threatening people's lives and property safety. Therefore, how to design a flexible, convenient, and excellent mechanical performance anti-shock energy-absorbing system according to the load-bearing characteristics of the structure has become a research hotspot in the field of impact energy-absorption. [0003] Thin-walled tubular struc...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2113/14G06F30/20
Inventor 陈玉丽熊峰杨奎坚胡湘张磊
Owner BEIHANG UNIV
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