Crash Barrier Offset Post Spacing Homogeneous Stiffness
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Solution Overview
Problem
Conventional crash barrier systems lack a homogeneous variation of stiffness, which can lead to increased dynamic impulses during vehicle collisions, potentially causing rollovers and severe injuries, especially for motorcycles and sports vehicles.
Innovation Solution
The crash barrier system achieves a more homogeneous stiffness distribution by offsetting posts and deformation tubes, incorporating a post collision guard, soft suspension, box beams, C-shaped rails, and energy-absorbing containers, with a predetermined breaking point to reduce impact forces and prevent undesired rotational impulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional crash barrier systems with uniform post spacing are used, then the structure is simple to manufacture and install, but the stiffness distribution is non-homogeneous leading to high dynamic impulses during collision
Solution Approach 1:
The barrier system is divided into multiple segments with posts and deformation tubes arranged at different intervals. The posts are spaced at a first interval while deformation tubes are spaced at a second interval that is a multiple of the first interval, creating a segmented structure with varying stiffness characteristics along the barrier length.
Solution Approach 2:
Different sections of the barrier system are given different stiffness properties through the offset arrangement of posts and deformation tubes. This creates local variations in stiffness that collectively achieve a more homogeneous overall stiffness distribution, reducing peak impulses in any single location during vehicle impact.
2Object-affected harmful factors
If the barrier system uses offset posts and deformation tubes for homogeneous stiffness, then dynamic impulse during collision is reduced, but the manufacturing and installation complexity increases
Solution Approach 1:
The offset arrangement of posts and deformation tubes creates a periodic pattern along the barrier system. This periodic structure with repeating units of different stiffness provides homogeneous energy absorption characteristics while maintaining a systematic arrangement that simplifies manufacturing and installation compared to completely irregular spacing.
3Reliability
If uniform post spacing is used, then installation is easier, but high dynamic impulses can cause vehicle rollovers and severe injuries
Solution Approach 1:
The barrier system incorporates deformation tubes that can dynamically deform during impact to absorb energy. The offset arrangement of these deformable elements creates a more uniform dynamic response during collision, reducing peak forces that could cause vehicle rollover or injury while maintaining structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design significantly reduces the impact impulse, minimizing the risk of vehicle rollovers and severe injuries by absorbing energy and distributing forces more evenly, thus enhancing safety for various vehicle types, including sports cars and motorcycles.
Implementation Method 1
deformation elements are fixed to the lower longitudinal stringer in the region of the stanchions and support a barrier rail
Implementation Method 2
incorporating a post collision guard, soft suspension, box beams, C-shaped rails, and energy-absorbing containers
Data Source
AI summary
A crash barrier system includes upper posts, box beams, upper tube profiles and barrier rails. The box beams are connected to the upper posts on a front side of the crash barrier system. The upper tube profiles are connected to the box beams. The barrier rails are fastened to the upper tube profiles. The upper posts are arranged axially parallel to one another at a uniform axial post spacing along the box beams. The upper tube profiles are arranged axially parallel to one another at a uniform axial tube spacing along the box beams. The post spacing differs from the tube spacing.