STINGER SOFTWARE FOR CALCULATION OF SHAPED CHARGE WARHEAD JET - - PowerPoint PPT Presentation

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STINGER SOFTWARE FOR CALCULATION OF SHAPED CHARGE WARHEAD JET - - PowerPoint PPT Presentation

Mar 14, 2024 601 likes •1.02k views

STINGER Version 2.1 1 STINGER SOFTWARE FOR CALCULATION OF SHAPED CHARGE WARHEAD JET PARAMETERS AND PENETRATION PARAMETERS STINGER Version 2.1 2 Method Combined method: Analytical based on : PER (Pugh, Eichelberger, and Rostoker)

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STINGER Version 2.1

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STINGER

SOFTWARE FOR CALCULATION OF SHAPED CHARGE WARHEAD JET PARAMETERS AND PENETRATION PARAMETERS

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STINGER Version 2.1

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Method

Combined method:

  • Analytical based on :

– PER (Pugh, Eichelberger, and Rostoker) jet formation theory – Modified version of the M. Defouneaux metal acceleration model for final plate velocity, – The shaped-charge penetration theory of DSM (DiPersio, Simon and Merendino) for penetration- standoff curves. – The piece wise penetration of Defourneaux for hole profiles,

  • Semi-empirical techniques based on published collected data
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STINGER Version 2.1

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Method – Cont. Formation of jet:

Warhead is divided in axial direction into zones (zonal elements) of constant thickness. Upon the action of detonation wave liner element is accelerated toward the liner axis with collapsing velocity, where, after interaction with opposite element, form axial jet toward the base of the liner and slug toward the apex of the liner.

Uncertainty: Depends on configuration, up to 10 %

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STINGER Version 2.1

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Accurate prediction of:

  • jet and Jet-tip velocity and mass
  • slug velocity and mass,
  • collapse velocity,
  • lead pellet formation.

Capability

Calculation of penetration parameters in homogeneous steel:

  • hole radius,
  • penetration depth,
  • variation of total penetration depth with standoff distance

The program is fast, robust and reliable. Compression to experiments as well as to more sophisticated hydrodynamic computer codes show good agreement.

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STINGER Version 2.1

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Purpose

Detail calculation of all parameters of shape charge jet and penetration process. Analysis of the influence of various design parameters

  • n the jet penetrability:
  • Charge characteristics
  • Liner thickness
  • Liner cone angle,
  • Initiation point,
  • Standoff distance,
  • Confinement characteristics,
  • Target characteristics
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STINGER Version 2.1

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Ranges of Basic Input Quantities

 Caliber: 20÷200mm  Charge shape: cylinder, cylinder – cone.  Charge confinement: In cylindrical case  Charge material: 24 predefined, plus user define possibility.  Liner shape: cone and rounded apex cone with linearly

varying thickness.

 Liner material: defined by density.  Initiation point: defined by coordinates.  Target material: Metal defined by density and Brinell

hardness

 Brake up time: Automatically determined or specified.

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Limitations The current version of the Program requires several empirically determined constants. Some values of these constants were determined upon the fitting the results of various experiments, and they are stored in the Program. But, it is recommended that for each real case user determine these constant from the experiment. The current version of the Program does not support definition of the liner by coordinates. This option is under construction.

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STINGER Version 2.1

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Main Menu

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Results

 Sketch (drawing) of projectile  Files and diagrams with calculated jet

parameters

 Files and diagrams with calculated penetration

parameters

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General Data and Computation Options

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Liner & Target Characteristics

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Warhead Characteristics

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Control Buttons

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Help Buttons

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Results

 Sketch (drawing) of projectile  Files and diagrams with calculated jet

parameters

 Files and diagrams with calculated penetration

parameters

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Sketch of the Warhead

Initiation points

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Output Files

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Output Files – Cont.

FILE NAME DESCRIPTION Output.txt Input data and various calculated quantities. InitialPosition.txt Charge and liner characteristics vs. axial position of the cone zonal elements. CollapsePrVar.txt Data which describes collapse process of the liner MassesVelEn.txt Data about masses and velocities of the liner, jet and slug. PenetrationPhVar.txt Various parameters which describe penetration process of the jet through target. PenetrationDepth.txt Data of depth of penetration and the radius of the hole inside target corresponding with the number of zones towards liner axis. TotalPenetration.txt Values of total penetration into target in function of standoff distance between liner base and target. AlphaiAnalysis.txt Penetration parameters for different inner liner cone half angle. EPSAnalysis.txt Penetration parameters for different liner thickness at cone base.

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Collapse Velocity

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Collapse Angle

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Bending Angle

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Liner, Jet & Slug Mass

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Jet and Slug Velocity

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Relative Velocity

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Total Penetration

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Penetration Depth

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Hole Radius

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Hole Radius vs. Penetration Depth

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Influence of Cone Angle on Jet Tip Velocity

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Influence of Cone Angle on Total Penetration & SO for PTmax

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Influence of Cone Angle on Penetration & Hole Radius

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Influence of Liner Thickness on Jet Tip Velocity

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Influence of Liner Thickness on Total penetration & SO for PTmax

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Influence of Liner Thickness on Penetration & Hole Radius

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Comparison With Experiments

On the next diagrams comparison of the calculation results with some other sources are shown for the following sketches:

  • 1. Experiment, 105 mm Shaped Charge, AD-277458
  • 2. Experiment, BRL AD-246352
  • 3. Calculation by program SCAP
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Comparison with 105 mm Shaped Charge, AD277458

Jet and slug velocity vs. relative liner position

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Comparison with Experiment BRL AD-246352

Jet velocity vs. relative liner position

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Comparison with Calculation of Program SCAP

Jet velocity and collapse velocity vs. relative liner position

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Comparison with Calculation

  • f Program SCAP - Cont. 1

Penetration vs. standoff distance.

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Comparison with Calculation

  • f Program SCAP - Cont. 2

Penetration vs. relative liner position