Warhead Perforated Mask for Selective Blast and Splinter Generation
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Solution Overview
Problem
Existing warheads face challenges in efficiently switching between splinter generation and pressure (blast) generation due to the casing acting as a barrier that suppresses vapor reactions by cooling the expanding vapors below reaction thresholds before they mix with ambient air, resulting in incomplete oxidation and reduced blast power.
Innovation Solution
The method involves using two ignition devices to control the detonation front's interaction with a porous Reactive Structure Material (RSM) mask, allowing for selective splinter or blast generation by adjusting the timing and angle of the detonation front's impact, thereby promoting complete vapor reactions when the mask is opened quickly to ambient air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the casing acts as a barrier between expanding vapors and ambient air, then the vapor temperature is maintained, but the after-reaction with oxygen is suppressed due to adiabatic expansion cooling
Solution Approach 1:
The perforated mask is pre-positioned around the explosive charge to enable controlled interaction between vapors and ambient air. The mask's porous structure is designed in advance to allow oxygen penetration at critical moments, ensuring complete oxidation reactions occur before vapor temperatures drop below reaction thresholds.
Solution Approach 2:
The perforated mask acts as an intermediary structure between the explosive vapors and ambient air. Its porous design allows selective passage of oxygen to the vapors while controlling the timing and rate of mixing, enabling complete after-reactions without requiring the casing to fully rupture.
2Use of energy by moving object
If the casing is removed or opened early to allow vapor mixing with air, then complete oxidation and high blast power are achieved, but the vapor temperature drops below reaction thresholds
Solution Approach 1:
The system prepares the perforated mask structure in advance with optimized pore distribution and thickness to control the timing of oxygen-vapor mixing. This preliminary configuration ensures that oxygen becomes available to the vapors at the precise moment when temperatures remain sufficient for complete oxidation reactions.
Solution Approach 2:
The perforated mask utilizes porous material structure to control mass transfer between ambient air and explosive vapors. The porous design allows gradual oxygen penetration to maintain reaction temperatures while enabling complete oxidation, avoiding the temperature drop that occurs with sudden casing rupture.
3Adaptability or versatility
If two ignition devices are used to control detonation timing, then selective splinter or blast generation is achieved, but the device complexity increases
Solution Approach 1:
The ignition system is segmented into two spatially separated ignition devices: one at the head end and one at the center of the warhead. This segmentation allows independent triggering of each device to produce different detonation patterns - head-end ignition for splinter generation and center ignition for blast generation - while keeping each individual ignition device relatively simple.
Solution Approach 2:
The dual ignition device configuration provides multi-functionality, allowing the same warhead to perform both splinter generation and blast generation modes. The system achieves versatility in mission capability without requiring completely different warhead designs for different functions.
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 approach enables the selective elimination of blast effects or the achievement of high blast power by controlling the initiation sites and timing, ensuring complete oxidation of vapors and maximizing energy release.
Implementation Method 1
following the triggering of only the first ignition device and then ensuing deflection of the detonation front produced
Implementation Method 2
as a result of this a complete after-reaction of the explosive vapors then follows due to the oxygen which is then available
Implementation Method 3
The explanation for this phenomenon lies in the sharp temperature drop caused by adiabatic expansion of the vapor gases
Data Source
AI summary
An initiation device and method allowing power output to be switched between blast generation and splinter generation. The device and method include a cylindrical warhead with a cylindrical, central explosive charge and a tubular perforated mask surrounding the explosive charge, and also with at least two ignition devices, the first ignition device arranged in a region of one of the head sides of the cylindrical charge, and the second ignition device arranged in a region around a center of a longitudinal axis of the warhead, and having a splinter-generating casing surrounding the perforated mask.