Inert Gas Buffer Ring for Hopkinson Bar Impact Protection
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Solution Overview
Problem
The dynamic true triaxial electromagnetic Hopkinson bar lacks an energy absorbing and buffering system, leading to damage of the waveguide bar under repeated impacts, which shortens its service life and complicates multi-axis, multi-directional testing.
Innovation Solution
An energy absorbing and buffering device using inert gas, such as nitrogen, is integrated into the Hopkinson bar system, comprising an energy absorbing and buffering ring, exhaust pipe, and inert gas storage bin, with a piston mechanism to absorb and dissipate impact energy through gas compression and diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no energy absorbing system is added to the electromagnetic Hopkinson bar, then the structure remains simple and electromagnetic pulse gun contact is maintained, but the waveguide bar suffers damage under repeated impacts and service life is shortened
Solution Approach 1:
The energy absorbing and buffering ring is nested within the hollow structure of the waveguide bar, with the collided impact ring, inert gas impact ring outer wall, and intra-annular air vessel forming concentric nested structures. This allows the energy absorbing system to be integrated within the existing waveguide bar geometry without adding external components that would interfere with the electromagnetic pulse gun.
Solution Approach 2:
The patent uses inert gas (nitrogen) stored in the inert gas storage bin and delivered through the exhaust pipe into the intra-annular air vessel to create a pneumatic cushioning system. The gas pressure absorbs impact energy from repeated collisions, protecting the waveguide bar while maintaining a relatively simple mechanical structure.
2Reliability
If an energy absorbing system is added to protect the waveguide bar, then damage under repeated impacts is reduced, but additional components may interfere with the electromagnetic pulse gun operation
Solution Approach 1:
The energy absorbing and buffering ring is nested within the hollow structure of the waveguide bar, ensuring that the protective mechanism does not protrude or add external components that would interfere with the electromagnetic pulse gun's operation or contact with the waveguide bar.
Solution Approach 2:
The energy absorbing function is extracted from the waveguide bar structure itself and placed into a separate, dedicated energy absorbing and buffering ring system. This separation allows the protective function to be added without modifying the waveguide bar's interaction with the electromagnetic pulse gun.
3Loss of energy
If traditional pneumatic Hopkinson bar absorbing bar is used, then energy absorption is effective, but it cannot be applied to the electromagnetic Hopkinson bar with multi-axis, multi-directional loading requirements
Solution Approach 1:
The energy absorbing and buffering ring is designed with a universal structure that can accommodate multi-axis, multi-directional dynamic loads while maintaining effective energy absorption. The ring geometry and inert gas cushioning system provide omnidirectional protection suitable for the complex loading conditions of the electromagnetic Hopkinson bar.
Solution Approach 2:
The patent replaces the traditional solid absorbing bar with a pneumatic system using inert gas. This pneumatic approach provides more flexible, multi-directional energy absorption capability compared to rigid solid structures, enabling compatibility with multi-axis loading configurations.
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
The device effectively reduces damage to the waveguide bar by dissipating impact energy as heat and friction, prolonging its service life and enabling reliable multi-axis testing without additional components interfering with the electromagnetic pulse gun.
Implementation Method 1
a piston mechanism to absorb and dissipate impact energy through gas compression and diffusion
Implementation Method 2
a piston mechanism to absorb and dissipate impact energy through gas compression and diffusion
Implementation Method 3
one end of the piston far from the air leakage hole is provided with a spring
Implementation Method 4
The device effectively reduces damage to the waveguide bar by dissipating impact energy as heat and friction
Data Source
AI summary
Provided are an energy absorbing and buffering device applied to a dynamic true triaxial electromagnetic Hopkinson bar and a testing and using method thereof. The device comprises an energy absorbing and buffering ring, an exhaust pipe and an inert gas storage bin. According to the testing and using method, the energy absorbing and buffering device is utilized and connected with a waveguide bar through a middle hollow structure; and a rear end of the energy absorbing and buffering ring is tightly attached to a baffle at a confining pressure loading end. The energy absorbing and buffering device provides energy absorbing and buffering for the waveguide bar, which prolongs a service life of the waveguide bar under an impact load.