MIL-STD-1822A(USAF)
l. Develop Final Design Approval Report (FDAR) (RA: SM/SA: Contractor/SNL/AFNWC).
m. Develop Electrical Interface Control Drawing (RA: SM/SA: Contractor/SNL/AFNWC).
n. FDAR analysis (RA: SM/SA: Contractor/SNL/AFNWC).
o. Preliminary weapon/aircraft electrical interface tests (RA: SM/SA: SNL/Contractors/AFMWC).
p. Weapon/aircraft interface and AMAC electrical tests (RA: AFNWC/SA: SNL/Contractors).
q. Full weapon system demonstration/drop test (RA: SM/SA: SNL/AFNWC). r. Publish ACCD/CC/Statement of Compatibility (RA: DoE/NNSA/SNL).
s. 6 DOF model Verification, Validation, & Accreditation (VV&A) (RA: SNL/SA: AFNWC).
t. Sign/approve/release Nuclear Compatibility Certification Statement (NCCS) (RA: AFNWC).
4.3.1 Nuclear weapon system compatibility certification activities.
Following is an expanded description of each nuclear weapon system compatibility certification activity:
4.3.1.1 Six (6) Degrees of Freedom (6 DOF) system analysis.
Modern day high-speed computers, combined with proven Modeling and Simulation (M&S) techniques, allow very complex system interactions to be accurately represented throughout the range of expected operations. Common techniques consider six-degrees of freedom (6 DOF) models that are analyzed through finite-element/matrix analysis. The 6 DOF model/analysis allow potential critical operations to be identified and aids in the development of follow-on wind tunnel and separation test planning
4.3.1.2 Wind tunnel tests.
Wind tunnel tests are normally performed to obtain: (1) store loads data; and (2) separation data prior to conducting flight tests. The USAF is interested in obtaining data associated with loads imposed on the aircraft by the store while SNL is most interested in information about the loads imposed on the bombs/warheads. The key to successful wind tunnel testing is to get involved early in an aircraft development program when the aircraft contractor is conducting wind tunnel testing for conventional stores. At this point the costs are minimal and the facilities and test hardware are available. The wind tunnel tests are generally performed in DoD facilities with the DoD paying for tests involving new aircraft and the DoE paying for tests on new bombs.
4.3.1.3 Lug and sway brace loads analysis.
The purpose of the lug and sway brace analysis program is to determine the mechanical loads imposed on weapon lugs and on the weapon case where the lugs attach and where the bomb rack sway braces make contact during carriage. The loads are determined for the full flight envelope of the aircraft. The flight envelope is a definition of mach number or speed versus altitude requirements for the aircraft. The bomb is designed to a set of requirements based on aircraft type called out in the original Military Characteristics (MCs) and this analysis verifies that the aircraft being added to the requirements (if that is the case) does not impose higher loads on the lugs and on the weapon case. Although it is possible to directly measure these loads by
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