Projectile Axial Gap Deformable Element Launch Shock
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Solution Overview
Problem
Projectiles experience structural damage due to high acceleration during launch, particularly when parts move relative to each other, leading to high impact collisions and shock waves that cause vibration damage.
Innovation Solution
Incorporating a deformable element within the axial gap between rotating parts of a projectile that permanently deforms during launch to absorb launch forces, preventing high impact collisions and maintaining the gap for smooth rotation post-launch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an axial gap is provided between parts to facilitate relative rotation, then ease of operation is improved, but during launch the gap closes rapidly causing high impact collision and structural damage
Solution Approach 1:
A deformable element is pre-installed within the axial gap between the first and second parts. During launch, this element deforms permanently to absorb the closing forces of the gap, cushioning the impact before it can reach the critical parts. This beforehand cushioning prevents high impact collision and the resulting shock waves that would otherwise cause structural damage while still allowing the gap to function for rotation.
2Adaptability or versatility
If parts are designed to move relative to each other during launch, then adaptability is improved, but high acceleration causes high impact collision and vibration damage
Solution Approach 1:
The deformable element acts as an intermediary component positioned within the axial gap between the first and second parts. During launch, this intermediary element deforms to absorb the relative movement forces, mediating the interaction between the two parts. This prevents direct high impact collision and the harmful vibration and shock waves that would otherwise propagate through the projectile structure.
3Strength
If a deformable element is introduced to absorb launch forces, then strength and damage prevention are improved, but device complexity increases
Solution Approach 1:
The deformable element is designed to undergo permanent deformation during launch, effectively 'discarding' its original shape to absorb launch forces. This sacrificial deformation protects the critical parts from damage. The element can be a simple cylindrical plug or lattice structure that is replaced after use, maintaining system simplicity while providing robust protection during the critical launch phase.
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 deformable element effectively absorbs launch forces, reducing damage to projectile components and ensuring smooth relative rotation by maintaining the axial gap, thereby mitigating structural damage and vibration.
Implementation Method 1
at least one deformable element arranged within the gap between the first and second parts, the deformable element being such as to deform permanently due to the closing of the axial gap between the first and second parts during projectile launch
Data Source
AI summary
An assembly (2) for attachment to a projectile comprises a first part (4) and a second part (6) mounted for rotation relative to the first part (4) about an axis (A). There is an axial gap (G) between the first and second parts (4, 6). At least one plastically deformable element (34) is arranged within the gap (G) between the first and second parts (4, 6), the plastically deformable element (34) being such as to deform due to the closing of the axial gap (G) between the first and second parts (4, 6) during launch of the projectile.