High gradient waveshape generating device used for impaction simulating trolley

Abstract

The invention discloses a high- grads waveform generating device which is used in collision simulating trolley, the invention aims at providing a high- grads waveform generating device; it includes front and back collision bar, front and back energy absorbing tube; said front and back energy absorbing tube are connected with the front and back collision bar; said front and back energy absorbing tube are separately fixed to the trolley; when the trolley is released, the front collision bar moves relatively to front energy absorbing tube after collision with obstacle wall, the thick bar part expands the thin tube part of front energy absorbing tube and at the same time the acting force is delivered to back collision bar, the back collision bar expends thin bar part of the back energy absorbing tube, the acting force is resultant force of front and back collision bar, the acting force is increased abruptly, grads of acceleration is ascend rapidly to simulate high- grads collision waveform; when back collision bar penetrates through the back energy absorbing tube, the acting force of front collision bar is remained, acceleration is decreased for the reduced acting force, so high- grads simulated waveform can be generated.

Description

technical field [0001] The invention relates to a waveform reproducing device for an automobile collision simulation platform used for safety research, test and inspection of vehicles. technical background [0002] In order to increase the safety performance of the vehicle and most reliably design the strength and stability of various facilities in the vehicle, as well as inspect and develop safety components, before putting into production, a dynamic test should be carried out on the safety performance of the vehicle to evaluate the frontal collision. The comprehensive strength and impact performance of each test part during the test is completed by reproducing the deceleration waveform and time relationship curve during the crash and the simulation test method of the speed during the crash. In order to make the test results more accurate, a real car is sometimes used in the test, but the real car is basically scrapped after the test is completed, which makes the test price...

AI Technical Summary

Problems solved by technology

[0003] 1. When simulating the collision curve, especially for some economical cars, because the collision process of economical cars is relatively violent, the resulting collision curve changes greatly, that is, the gradient of the collision curve is very large, and the existing technology is due to The deformation of the energy absorbing tube is relatively smooth, and it is difficult to simulate such a large gradient curve;

[0004] 2. When the weight of the trolley increases, the number of required guide rods and energy-absorbing tubes must also increase proportionally. There are too many energy-absorbing tubes, and it is difficult to ensure the consistency between each other, which makes the whole simulation more difficult. The repeatability of the resulting crash simulation curves decreased

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