Penetrator Damping Layer for Shock Wave Dissipation
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Solution Overview
Problem
Existing penetrators face challenges in effectively damping high-frequency shock waves and stress on internal components due to increased speed and reduced size, leading to potential failure of mechanical parts like ignition devices and explosive charges, especially when penetrating hardened targets like high-strength concrete or rock structures.
Innovation Solution
A compact damping device with a damping layer that can be selectively positioned and divided into rings or conical sections, providing a firm mechanical connection to dissipate energy through deformation work, combined with adjustable spacers and additional soft layers to manage vibrations and accelerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the penetrator caliber size is reduced and speed is increased to penetrate hardened targets, then the penetrator's ability to penetrate high-strength concrete and rock is improved, but the shock waves and high-frequency vibrations are transmitted more strongly to internal components causing potential failure
Solution Approach 1:
A damping layer is provided between the penetrator jacket and the built-in parts (ignition device, explosive charge) that dampens shock waves and high-frequency vibrations before they reach the internal components. This cushioning effect prevents premature detonation or mechanical failure of sensitive parts during high-speed penetration of hardened targets.
2Reliability
If a damping layer is added to protect internal components from shock waves, then the reliability of built-in parts is improved, but the installation space requirements and device complexity increase
Solution Approach 1:
The damping layer is implemented as a thin-walled structure with relatively constant wall thickness along the longitudinal direction, rather than a bulky mass. This thin-film approach provides effective shock wave damping while minimizing the installation space required and maintaining a simple overall device structure that integrates easily with the penetrator jacket.
3Reliability
If the damping layer extends over the entire length of built-in parts, then comprehensive protection is achieved, but the installation space and device complexity increase significantly
Solution Approach 1:
The damping layer is positioned specifically in regions where shock wave impact is most critical, such as at the front and rear of the penetrator where built-in parts are most vulnerable. The layer may extend over only part of the length of built-in parts or be divided into separate rings, providing targeted protection where needed while minimizing overall material usage and installation space requirements.
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 solution effectively reduces high-frequency accelerations and stress on internal components, ensuring uniform acceleration profiles and preventing premature detonation or mechanical failure, while allowing for precise adjustment and adaptation to the penetrator's geometry and material properties.
Implementation Method 1
the layer lying against the inside of the mantle extends from the tip to the rear of the mantle of the penetrator, the thickness of which decreases from the tip or remains constant. The damping layer protects the explosive charge from the shock load on impact and thus prevents premature detonation or sensitization of the explosive.
Implementation Method 2
a damping layer lying on the inside of the jacket, which surrounds at least one built-in part in a ring and dampens the shock waves acting on the jacket by means of deformation
Data Source
Figure 1
Figure 2
AI summary
The device has a damping layer (3) sectionally extended over length of a mounting part (2) in a longitudinal direction (7a) of a penetrator, where the damping layer is attached to a casing (1). The damping layer is firmly connected with the casing of the penetrator at an outer side of the mounting part. The damping layer comprises openings at an outer surface of the damping layer. The openings correspond to circumferential devices with a toothed cross-section on an interior side of the casing of the penetrator or an outer side of the mounting part in a form-fit manner. USE : Damping device for mounting parts i.e. ignition devices, in penetrators for neutralizing high-quality objects. ADVANTAGE : The openings correspond to the circumferential devices with the toothed cross-section on the interior side of the casing of the penetrator or the outer side of the mounting part in a form-fit manner, thus providing an effective damping device for the mounting parts, and hence enabling damping of blasting agents arranged at the interior of the penetrators. DESCRIPTION OF DRAWINGS : The drawing shows a simplified partial sectional view of a damping device. 1 : Casing 1a : Shoulder of casing 2 : Mounting part 3 : Damping layer 7a : Longitudinal direction.