A123 Dynamic Shock Analysis Extension Request

BLOCK 1-DATA ITEM NO.: A123
BLOCK 2-DATA ITEM TITLE: DYNAMIC SHOCK ANALYSIS REPORT

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BLOCK 3-DATA DESCRIPTION:
The Dynamic Shock Analysis Extension Request shall include the following:

  1. Identical Item. If the design of a new item is identical to that of one previously approved by a dynamic shock analysis, the Dynamic Shock Analysis Extension Request shall include the following data:
    1. A copy of the Dynamic Shock Analysis Mathematical Model Report, Data Item No. A121, and Dynamic Shock Analysis Report, Data Item No. A122, upon which the requested extension is based.
    2. A copy of the acceptance authority correspondence which conveyed approval of the previously analyzed equipment, foundation and system. If not available, reference to the correspondence shall be identified. 
  2. Similar Item. If the design of a new item is similar, but not identical to that of a previously shock analyzed item or where the intended orientation or installation differences cannot be shown to be insignificant from a shock standpoint, the Dynamic Shock Analysis Extension Request shall include the following:
    1. Detailed drawings of the tested and untested items and delineation of the shipboard installations and orientation of the items. The drawings shall be marked to clarify any design changes that have occurred between the old and new items. 
    2. A Mathematical Model Report and Dynamic Shock Analysis Report upon which the requested extension is based. 
    3. The acceptance authority correspondence which conveyed approval of the previously analyzed equipment, foundation, and/or system. If not available, reference to the correspondence shall be identified. 
    4. The detailed evaluation of the design, service, orientation and installation differences of the analyzed and unanalyzed items, as required by the Comparison below.
    5. Applicable military specifications and associated dates of issue for the original analyzed item. 
  3. Comparison. The Dynamic Shock Analysis Extension Request shall also include the following:
    1. Design differences between the new and previously analyzed item. 
    2. Differences in shape, orientation, weight, and material composition of parts or assemblies and differences in fabrication or construction. 
    3. Differences in allowable stress and deflection criteria. 
    4. Differences in continuous operating loads such as torque and system pressure.
  4. Calculations. The results of engineering calculations performed in support of these requirement shall also be included. Engineering assumptions attendant to these calculations shall be stated.

BLOCK 4-REVIEW REQ.:

Government approval required for technical content. Allow 45 days for Government review and comment.

BLOCK 5-SUBMITTAL SCHEDULE:

NLT 200 DPT scheduled dynamic shock analysis or 20 days after Contractor has identified that an item may be eligible for dynamic shock analysis extension, whichever is earlier; R/ASR 20 DARC. Revisions shall incorporate Government comments.

Reference: DRL A123 21 July 2000