crash pad design

The crash platform must be designed so that no fragments are ejected during the collision. After the frontal and side impact tests, the fragments produced by the crash pad must remain on the crash pad and cannot damage the collision vehicle, which surrounds it. Pedestrians and other vehicles cause damage.

The following factors should be considered in the design of crash pads:

(1) Because the protective pad is exposed to the external environment, its material must meet the requirements of high and low temperature resistance and corrosion resistance.

(2) The crash platform must be designed so that no fragments are ejected during the collision. After the frontal and side impact tests, the fragments produced by the crash pad must remain on the crash pad and cannot damage the collision vehicle, which surrounds it. Pedestrians and other vehicles cause damage.

(3) After the vehicle hits the crash platform, the driver's acceleration should be less than 12g, and the average acceleration in the last 10ms should be less than 20g, and after the vehicle runs out of control hits the crash pad, the vehicle cannot pass through the crash pad; the adjacent driving lane, so as not to collide with the car behind and cause a secondary accident.

(4) The height of the crash platform should not be too high or too short; if it is too high, it will easily block the driver's view; If it is too short, the vehicle will easily climb onto the crash pad. Momentum conservation principle The crash platform is designed by economic considerations. After the runaway vehicle collides with the crash pad, the vehicle will generally not stop. Therefore, a certain safety margin must be established between the crash platform and the protected obstacle. The distance is generally about 60 cm. When the anti-collision damper of the conservation of momentum principle type uses the combination of anti-collision cylinders, after determining the arrangement, the number of cylinders required can be determined by trial calculation. Since the collision process is relatively complicated, the process experimental o Empirical values and arrangement sequence are generally used. Combine with no less than 5 bumpers.

FAQ

The role of highway guardrails and installation precautions

The road guardrail separates the traffic of motor vehicles, non-motor vehicles and pedestrians, and separates the road longitudinally in the section, so that motor vehicles, non-motor vehicles and pedestrians can travel in separate lanes, which improves the safety of road traffic and improves traffic order;

How does the road marking machine work?

Road markings are also called road markings, that is, lines, arrows, signs, etc. which we can see on the road every day to identify traffic information, and play a role in traffic control and guidance. Next, the editor will take you to understand how road marking is constructed and what should be paid attention to during construction.

Selection of shock pad type and application location

When selecting and designing the crash pad, the size of the crash pad should be in accordance with the site conditions. In the event of a frontal collision and side collision, it can effectively protect obstacles and cannot encroach on the free space of the road. The Crash Pad can choose different structural shapes and use methods according to the terrain conditions and the degree of injury that may be caused in the event of a collision accident. Most of the anti-collision pads used on national roads are circular anti-collision cylinders made of glass fiber reinforced plastic, combined anti-collision pillars and other products.

What are the classifications of marking machines?

Vehicle-mounted marking machine: In the form of a driving bracket, the front and rear of the driving body are equipped with machinery, which is used in large-scale projects and long-distance construction marking. Operators must understand the skills driving and driving walking, saving time and effort.

Scratching machine and its accessories.

Width of marking lines: The width of international road markings is 15 cm. Considering that the marking machine can be used in parking lots, residential areas and other places, it is necessary to purchase a marking machine with a width adjustment function, which will help to use reasonably and save paint. The general adjustable range is 5-15cm.

crash pad design