Design and calculation method of trolley safety protection system for collision test

Abstract

The invention provides a design and calculation method of a trolley safety protection system for a collision test. The protection system comprises a braking device, an intercepting device and a guiding device. The design and calculation method is a design and calculation method of the safety protection system taking the mass and the collision speed of the test trolley as design bases. The safety protection system is mainly used for determining the constant output damping force, the intercepting cable diameter, the guide device and other design contents which need to be provided by a brake device, so the safety protection system can be repeatedly used while the safety protection of the test trolley is realized.

Description

technical field [0001] The invention relates to the technical field of safety protection, in particular to a design calculation method for a safety protection system of a trolley used in a crash test. Background technique [0002] During the collision process between the test bench and the column, under the action of the collision force, the column produces plastic deformation to absorb energy. With the continuous improvement of the quality and speed of the test trolley, in the collision test of the trolley, the impact force causes a large bending moment at the root of the column, which makes the material yield, and the column undergoes a large plastic deformation and then falls, while the column can only be less Part of the collision energy is absorbed, and the trolley is still moving forward at a relatively high speed. The general method for how to make the trolley stop safely in the crash test is: place rubber tires, anti-collision sand buckets, and anti-collision pads i...

AI Technical Summary

Problems solved by technology

Slideway and metal extrusion dampers can control the output of relatively stable damping force and output small peak force, but they need to use the brake for a long time to control the driving speed, and the long-term work of the brake may easily cause the brake hub to overheat and cause damage. The braking effect of the brake is weakened or invalid, resulting in the loss of control of the vehicle and causing traffic accidents. However, the stirring-type net cable energy-absorbing system has the problem of unstable damping force output, which causes the force transmission cable to collapse due to the surge of stress at the moment of vehicle collision. broken

[0004] Although the protection devices involved in the above protection methods can stop the out-of-control vehicles, many tests are needed to verify whether the performance of the protection system can meet the actual needs before the product is put into use, that is, there is no ready-made design calculation method for According to the researcher's reference, multiple tests are required to verify the feasibility of the designed protection system before the product is officially put into use. The product designed in this way cannot meet the protection requirements well, and also increases the test cost.

[0005] Therefore, the present invention takes the trolley in the collision test as the protection object, realizes the safety protection of the test trolley, does not reduce the protection ability of the protection system itself at the same time, and achieves the purpose that both the protection system and the test trolley can be reused, thus proposing A calculation method for the design and calculation of the protection system to safely stop the out-of-control trolley, trying to solve the problem that the designed product needs multiple test verifications because there is no ready-made method for the designer to refer to, thus increasing the test cost

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