Crashproof guard bar
An anti-collision guardrail and guardrail technology, applied in bridge parts, roads, bridges and other directions, can solve the problems of vehicle rollover, reduction of the effective height of guardrails, large windward area, etc., and achieve the effect of good guiding ability
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[0024] According to the momentum theorem, if a particle's speed changes sharply in a very short period of time, but its position remains almost unchanged, the particle will suffer a collision. Assuming that during the collision, the mass of the objects involved in the collision does not change, and the time interval Δt is integrated by Newton's law, the change in momentum is equal to the impulse, namely:
[0025] I′=mv s ′ Momentum of the particle after collision
[0026] I=mv s Momentum of the particle before collision
[0027] P = ∫ t t ′ Fdt Impulse of mass point
[0028] I′-I=P
[0029] In the entire collision process, F is a variable and a function of time, but it can be approximately regarded as a constant value in each time interval Δt, then:
[0030] mv n -mv n-1 = F n Δt n=1, 2, 3Λ
[0031] Another way t...
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