1、 MIL-STD-331C w/CHANGE 1 22 June 2009 SUPERSEDING MIL-STD-331C 5 JANUARY 2005 DEPARTMENT OF DEFENSE TEST METHOD STANDARD FUZE AND FUZE COMPONENTS, ENVIRONMENTAL AND PERFORMANCE TESTS FOR AMSC N/A FSG 13GP DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREME
2、NT SENSITIVE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-331C w/CHANGE 1 iiFOREWORD 1. This standard is approved for use by all Departments and Agencies of the Department of Defense. 2. MIL-STD-331C supersedes MIL-STD-331B, dated 1 Decemb
3、er 1989, including all change notices. It has been prepared in accordance with MIL-STD-962C and complies with DoD policy for greater use of commercial products and practices. 3. MIL-STD-331 is a test method type standard. Its scope has evolved over the years reflecting increased standardization of e
4、nvironmental and performance tests among the services and improvements in fuze design, test technology and safety. MIL-STD-331B was largely an editorial effort to consolidate test methods and restructure the standard. Attention is directed to the test grouping and use of standard, alternate and opti
5、onal test methods described in sections 5.2 and 5.4 respectively. 4. In the process of reorganization, tests were renumbered. Where old test numbers are still referenced in fuze specifications and test plans, Table I is included to show the correspondence between prior test numbers and the new numbe
6、rs. 5. Design agencies are cautioned that the existence of this standard does not relieve them of the responsibility to define the environments the fuze will be exposed to during its life cycle. This definition is essential for proper test selection and the identification of any required test deviat
7、ion. Specification of the test method alone in a test directive may not adequately define the conditions in which a test is conducted. Many test methods in this standard include parameters or options which permit tailoring to specific fuze designs, environments and uses. Table II results from the co
8、ncern for properly invoking the use of test methods. The use of Table II and careful review of the entire test method is strongly encouraged when preparing development or production specifications and test plans. 6. Paragraph numbers in each test have been modified to include the test method number.
9、 Although this makes the numbers longer, each paragraph in the standard is now uniquely identified. This is intended to reduce confusion when referencing specific material. 7. MIL-STD-331C includes three new tests (D6, D7 and D8) and two revised tests (F2.1 and F4.1). Test D6, Brush Impact No-Fire T
10、est has been included to verify the performance of an armed anti armor munition demonstrating it will penetrate light foliage such as brush. Test D7, Mortar Ammunition Fuze Double Loading Test has been included to determine, in the event of double loading, whether the contour of the ogive of the pro
11、jectile fuze can initiate the round dropped on it. Test D8, Progressive Arming Test has been included to determine the correlation between the position of the explosive train interrupter and the probability of explosive transfer. 8. Test B1.1, Transportation Vibration (Bare and Packaged Fuzes), repl
12、aces both Tests B1 and B2. It employs the use of random vibration test techniques and can be tailored to various land, sea and air transportation scenarios. All former sinusoidal vibration test methods have been retained as alternate tests in Section B1.6 and may be specified for procurement of olde
13、r fuzes which cannot comply with the requirements of the random vibration test schedules. 9. Design agencies which frequently use other fuze and explosive component tests or variations of tests contained in this standard are requested to furnish this information to the preparing activity (see addres
14、s above) for possible inclusion in MIL-STD-331. 10. Comments, suggestions, or questions on this document should be addressed to: US Army, Research, Development and Engineering Command, Armament Research, Development and Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
15、ense from IHS-,-,-MIL-STD-331C w/CHANGE 1 iiiEngineering Center, ATTN: RDAR-QES-E, Picatinny Arsenal, NJ 07806-5000 or emailed to ardecstdznconus.army.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online data base at http:
16、/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-331C w/CHANGE 1 ivSUMMARY OF CHANGE 1 MODIFICATIONS 1. Test C1 - Temperature and Humidity, TABLE C1-1 and TABLE C1- II: the start and stop times on two-cycle days were corr
17、ected. 2. Test D1 - Primary Explosive Component Safety Test: a second part was added to determine the numerical effectiveness of the interrupter. 3. Test D1 - Primary Explosive Component Safety Test, section D1.6 - Alternate and Optional Tests: the Missing Barrier Test was added; the paragraphs for
18、the cookoff test for projectile fuzes and the fast cookoff test for fuzes were deleted. 4. Test D1 - Primary Explosive Component Safety Test, section D1.7.2 - Bibliography: the bibliography was updated. 5. Test D2 - Arming Distance Test, section D2.5.1 - Arming procedure: the four statistical method
19、s listed were removed and transferred to Appendix G. 6. Test D-8 - Progressive Arm Test: the use of this test to determine the numerical effectiveness of the interrupter was addressed. Definitions and procedures for testing pyrotechnic trains were added. 7. Appendix G - Statistical Methods to Determ
20、ine the Initiation Probability of One-Shot Devices: this is a new Appendix to the document. The four statistical methods removed from Test D2 are included in this Appendix while the Neyer D-Optimal method was added as a fifth method. 8. Typographical and formatting errors were corrected throughout t
21、he document. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-331C w/CHANGE 1 vCONTENTS Section Page 1 SCOPE 1 1.1 Scope 1 1.2 Safety and Suitability for Service Assessment of Fuzing Systems 1 1.2.1 NATO 1 1.2.1.1 STANAG 4157 1 1.3 Application
22、 3 1.4 Test identification 3 1.5 Method of revision 3 1.6 Method of reference 3 2 APPLICABLE DOCUMENTS 3 2.1 Government documents 3 2.1.1 Specifications, standards and handbooks 3 2.1.2 Other Government documents, drawings and publications 4 2.2 Non-Government publications 5 2.3 Order of precedence
23、6 3 DEFINITIONS 6 4 GENERAL REQUIREMENTS 8 4.1 Test usage 8 4.2 Test compliance 8 4.3 Selection and specification of tests 8 4.4 Test equipment 8 4.4.1 Capability 8 4.4.2 Accuracy 8 4.5 Test conditions 9 4.5.1 Installation of test item 9 4.5.2 Tolerance of test conditions 9 4.5.2.1 Temperature 9 4.5
24、.2.2 Pressure 9 4.5.2.3 Relative humidity 9 4.5.2.4 Vibration amplitude 9 4.5.3 Preconditioning and stabilization 9 4.6 Examination and test criteria 9 4.6.1 Visual examination 9 4.6.2 Criteria for passing tests 10 4.6.2.1 Safe 10 4.6.2.2 Operable 10 Provided by IHSNot for ResaleNo reproduction or n
25、etworking permitted without license from IHS-,-,-MIL-STD-331C w/CHANGE 1 vi4.7 Safety condition 10 4.8 Test documentation 10 4.8.1 Test directive 10 4.8.2 Test item record 1 4.8.2.1 Condition before test 11 4.8.2.2 Condition during test 11 4.8.2.3 Condition after test 11 4.8.3 Test equipment 11 4.8.
26、4 Test conditions 11 4.8.5 Test results 12 5 DETAILED REQUIREMENTS 12 5.1 Individual tests 12 5.2 Test classification 12 5.2.1 Group A - Mechanical Shock Tests 12 5.2.2 Group B - Vibration Tests 12 5.2.3 Group C - Climatic Tests 12 5.2.4 Group D - Safety, Arming and Functioning Tests 12 5.2.5 Group
27、E - Aircraft Munition Tests 12 5.2.6 Group F - Electric and Magnetic Influence Tests 12 5.3 Test number conversion 12 5.4 Invoking tests 13 5.4.1 Alternate and optional tests 13 5.4.2 Test parameters 13 6 NOTES 13 6.1 Background information 13 6.1.1 Safety 13 6.1.2 Short operational time 13 6.1.3 On
28、e-time operation 13 6.2 Test content and format 14 6.2.1 Purpose 14 6.2.1.1 Location 14 6.2.1.2 Safety, reliability or performance 14 6.2.1.3 Life cycle phase 14 6.2.1.4 Environment or performance measurement 14 6.2.2 Description 14 6.2.2.1 General 14 6.2.2.2 Fuze configuration 14 6.2.2.3 Variations
29、 14 6.2.2.4 Applicable publications 14 6.2.2.5 Test documentation 15 6.2.3 Criteria for passing test 15 6.2.3.1 Fuze condition 15 6.2.3.2 Decision basis 15 6.2.4 Equipment 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-331C w/CHANGE 1 vii
30、6.2.5 Procedure 15 6.2.6 Alternate and optional tests 15 6.2.7 Related information 15 6.2.8 Illustrations and tables 16 6.3 Units of measure 16 6.4 Test characteristics 17 6.5 Subject term (key word) listing 17 6.6 Changes from previous issue 17 6.7 Useful references 17 Appendix A - Mechanical Shock
31、 Tests A1 Jolt 28 A2.1 Jumble 3 A3 Twelve-meter (40-Foot) Drop 37 A4.1 One and One-half Meter (Five-Foot) Drop 40 A5 Transportation Handling (Packaged Fuzes) 43 Appendix B - Vibration Tests B1.1 Transportation Vibration (Bare and Packaged Fuzes) 54 B2 (Requirement are now in Test B1.1) 98 B3 Tactica
32、l Vibration 9 Appendix C - Climatic Tests C1 Temperature (2) given their generally greater sensitivity to the service environment, fuzes warrant testing in more severe environments than the munitions in which they are installed; (3) the rationale used in tailoring the standard environmental tests sh
33、ould be documented and retained as part of the S3 assessment file; the rationale could include avoiding duplication of tests conducted to meet national fuze standards. b. Electromagnetic Environment Testing: Testing of fuzes in service electromagnetic (EM) environments is conducted with two primary
34、objectives: (1) confirming that the fuze electronics will remain suitable for sevice after exposure to worst-case environments; and (2) confirming that fuze safety is not degraded for fuzes employing electric detonators, or fuzes employing electronic circuits controlling all or part of the safety-an
35、d-arming system. c. The safety and suitability test requirements for fuzes should be based on all scenarios examined in the Fuze Design Safety Hazard Assessment (conducted in accordance with STANAG 4187 (or MIL-STD-1316), and must include confirmation that: (1) the energy passed through the initiati
36、ng element of the fuze explosive train produced by a service EM environment will not exceed the factored no-fire safety threshold, as defined in STANAG 4187 (or MIL-DTL-23659); and (2) the service EM environment will not degrade safety or suitability by damaging or upsetting the electronic circuitry
37、 controlling the safety-and arming and initiation systems, respectively. d. Quantities: Quantities should be selected so as to provide statistically meaningful results and should reflect the quantities used in previous assessments of similar fuzes which subsequently entered into service. The overall
38、 objective should be to both meet national requirements and provide a convincing demonstration of fuze safety and suitability for service to other participating nations. The approval of the quantities of fuzes to be Provided by IHSNot for ResaleNo reproduction or networking permitted without license
39、 from IHS-,-,-MIL-STD-331C w/CHANGE 1 3subjected to the mandatory and recommended tests is the responsibility of the National Safety Approving Authority (normally, the agencies listed in Table 1). e. Pass/Fail Criteria: The general criterion for passing any of the mandatory and recommended tests is
40、that an unsafe condition not be observed during the test or upon examination of the fuze after the test. Given the relatively small sample sizes generally employed, one observed unsafe condition generally constitutes a failure. Depending upon the fuze or system design requirement, a small decrease i
41、n fuze performance may be acceptable if safety is not affected; large degradations in fuze performance indicate that the fuze is not acceptable for service use. Pass/fail criteria are provided in the test procedures, where appropriate. 1.3 Application. This standard generally applies to all fuzes, a
42、s well as components of weapon systems serving a fuze function, such as torpedo exploders and underwater mine firing mechanisms. 1.4 Test identification. The detailed requirements are documented as individual tests and contained as appendices to this standard. Each test is identified by an alpha-num
43、eric sequence which begins with a letter indicating the test group. This is followed by a sequentially-assigned number. 1.5 Method of revision. Tests are revised on an individual basis and issued as change notices when required. Revised tests are identified by a decimal number after the test number.
44、 Revised test parameters affecting test results apply to fuzes developed subsequent to the change notice. All current test requirements are described in the first five sections of the test. Superseded test requirements with applicable dates are located in Section 6 of the test and identified as alternate tests for older fuzes. 1.6 Method of reference. Specific tests or test sequences may be invoked by the developing or procuring agency within a formal engineering development test plan or procurement specification. Additionally, many
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