Dual operating mode warhead

• US 5,509,357 A
• Filed: 03/03/1995
• Issued: 04/23/1996
• Est. Priority Date: 03/03/1995
• Status: Expired due to Fees

• Current Assignee: Northrop Grumman Corporation
• Original Assignee: Northrop Grumman Corporation
• Inventors: Lawther, Robert J.
• Primary Examiner(s): Nelson, Peter A.
• Application Number:
  US08/399,114
• Time in Patent Office: 417 Days
• Field of Search: 102/307, 102/476, 102/309
• US Class Current: 102/307
• CPC Class Codes: F42B 12/10 with shaped or hollow charge shaped or hollow charges per se F42B1/02 ; mines having hollow charges F42B23/04
• CPC Class Codes: F42B 12/22 with fragmentation-hull construction
• CPC Class Codes: F42C 19/0842 Arrangements of a multiplicity of primers or detonators, dispersed within a warhead, for multiple mode selection

Abstract

A dual operating mode warhead comprises a generally cylindrical explosive charge having a longitudinal axis and an outer peripheral surface extending between front and rear facing initiation surfaces. A front detonator initiates peripheral detonation of the explosive charge at the front facing initiation surface and creates a detonation wave travelling through the explosive charge toward the rear facing initiation surface. A rear detonator initiates detonation of the explosive charge at the rear facing initiation surface and creates a detonation wave travelling through the explosive charge and toward the forward facing initiation surface. Against heavy armor, only the rear initiation is used. A precision shaped charge proximate the front facing surface is responsive to the rear detonation wave to produce a high speed forward travelling jet with excellent armor piercing capability. Against softer targets, a fragmentation case proximate the outer peripheral surface of the explosive charge is responsive to operation of both the first and second detonation waves to produce a radially directed planar sidespray pattern. With this construction, actuation of the rear detonator alone results in an armor piercing mode of operation whereas near simultaneous actuation of both detonators results in a wider area of impact of the forward focused energy and in an enhanced sidespray fragmentation. Timing of initiation of the two detonators will be optimized specifically for any design application.

Claims

1. A dual operating mode warhead comprising:

an axially symmetric explosive charge having a longitudinal axis and an outer peripheral surface extending between a front facing initiation surface and a rear facing initiation surface, said front facing initiation surface and said rear facing initiation surface both lying in planes transverse of said outer peripheral surface;

first detonating means for initiating detonation of said explosive charge at said front facing initiation surface and creating a first detonation wave for travelling through said explosive charge toward said rear facing initiation surface; and

second detonating means for initiating detonation of said explosive charge at said rear facing initiation surface and creating a second detonation wave for travelling through said explosive charge toward said forward facing initiation surface;

shaped lined charge means shaped for penetration of armor or hard target material proximate said front facing initiation surface and responsive to the second detonation wave to produce a high speed forward traveling jet with armor piercing capability; and

a fragmentation case having a fracture grid construction proximate said outer peripheral surface and intermediate said front facing initiation surface and Said rear facing initiation surface;

whereby actuation of said second detonating means alone results in maximum armor penetration of a target; and

whereby substantially simultaneous actuation of said first and second detonating means results both in armor penetration of the target and in a radially directed sidespray pattern of fragmentation of said fragmentation case against the target.

2. A dual operating mode warhead as set forth in claim 1

wherein said front facing initiation surface includes a lined cavity symmetric about the longitudinal axis and an annular surface at a base of said cavity;

and

wherein said shaped lined charge means includes liner means fixedly disposed in a contiguous relationship with said front facing initiation surface, said liner means being responsive to said second detonation wave for collapsing toward said longitudinal axis and generating a combined long narrow high speed penetrating jet for armor penetration.

3. A method of selectively operating a warhead according to the type of intended target comprising the steps of:

providing an axially symmetric explosive charge having a longitudinal axis and an outer peripheral surface extending between a front facing initiation surface and a rear facing initiation surface, the front facing initiation surface and the rear facing initiation surface both lying in planes transverse of the outer peripheral surface, the explosive charge including a shaped lined charge means shaped for penetration of armor proximate the front facing initiating surface and responsive to the second detonation wave to produce a high speed forward travelling jet with armor piercing capability;

providing a fragmentation case proximate the outer peripheral surface of the explosive charge intermediate the front facing initiation surface and the rear facing initiation surface;

operating a first detonating means for initiating detonation of the explosive charge at the front facing initiation surface and creating a first detonation wave for travelling through the explosive charge toward the rear facing initiation surface; and

operating a second detonating means for initiating detonation of the explosive charge at the rear facing initiation surface and creating a second detonation wave for travelling through the explosive charge toward the forward facing initiation surface;

whereby actuation of the second detonating means alone results in maximum armor penetration of a target; and

whereby substantially simultaneous actuation of the first and second detonating means results both in armor penetration of the target and in a radially directed sidespray pattern of fragmentation of the fragmentation case against the target.