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Thin-walled energy-absorbing device

An energy-absorbing device and thin-walled technology, applied in bumpers and other directions, can solve problems such as excessive initial yield loads, achieve the effects of absorbing and dissipating more kinetic energy, avoiding Euler instability, and high passive safety

Active Publication Date: 2012-09-19
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curved section can ensure a stable failure mode and controllable plastic deformation, and the patent also has the problem of excessive initial yield load

Method used

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Examples

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Embodiment Construction

[0039] Below in conjunction with example the present invention is described in detail.

[0040] The thin-walled cylinder with regular pyramidal corrugations of the present invention, its front view is as figure 2 As shown, the left view is as image 3 As shown, the outer surface of the thin-walled circular tube forms an energy-absorbing unit at a certain interval h along the axial direction of the thin-walled cylinder, and each energy-absorbing unit has the same structure and size.

[0041] The specific structure diagram of the energy-absorbing unit of the thin-walled cylinder is as follows: Figure 8 As shown, it can be described as follows:

[0042] The energy absorbing unit is OO 1 is an n-sided cylinder structure with axis, n is a natural number greater than or equal to 3, when n is equal to 11, the left view of the cylinder structure is as follows image 3 shown. The inner cross-section of the cylinder and the outer cross-section at half the height of the energy-abs...

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Abstract

The invention provides a thin-walled energy-absorbing device when a vehicle is passively collided and belongs to the technical field of damping parts for vehicle collision impact. The energy-absorbing device comprises energy-absorbing units which are connected with one another and have the same structure and size; the inner surface of each energy-absorbing unit is in a regularly N-sided shape, and each side of the energy-absorbing unit forms an energy-absorbing body of the energy-absorbing unit; and the outer surface of the energy-absorbing body is of a pyramid-shaped corrugated structure. When the energy-absorbing device is a regularly 11-sided thin-walled cylinder, the height h of each energy-absorbing unit is 70.38 mm; when the radius of an externally tangent circle on the inner surface of each energy-absorbing unit is 40.16 mm, the energy-absorbing effect of the energy-absorbing device is optimal. The energy-absorbing device has the benefits that the requirements of high specific energy absorption ratio and low load uniformity coefficient can be simultaneously satisfied, and the performances of deformation controllability and impact adsorption function when a thin-walled energy-absorbing structure is widely applied to a vehicle is passively collided are improved, so that the passive safety of the vehicle is improved.

Description

technical field [0001] The invention belongs to the technical field of damping accessories for vehicle collision impulse, and in particular relates to a thin-walled energy-absorbing device when a vehicle is passively collided. Background technique [0002] The crashworthiness of vehicles in collision accidents is a key link in passive safety analysis. Metal thin-walled structures are widely used in various fields such as automobiles, ships, and aerospace because of their good anti-collision and energy-absorbing characteristics. In the current design of anti-collision and energy-absorbing structures in industries such as automobiles, ships, and aircrafts, metal thin-walled round-section tubes or square-section tubes with smooth surfaces are generally used. [0003] Metal thin-walled energy-absorbing components mainly dissipate the impact kinetic energy generated by violent collisions through plastic deformation. In actual collision accidents, there are often multiple failure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R19/18
Inventor 胡晓光杨靖波
Owner CHINA ELECTRIC POWER RES INST
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