DI-ENVR-81279

Dynamic Shock Analysis Extension Request

The Dynamic Shock Analysis Extension Request provides information required to support the shock qualifications of shipboard equipment, foundations, and/or systems based upon previously approved dynamic shock analyses.

Approval DateJuly 28, 1992

AMSC NumberN6770

Preparing Activity—

Project Number—

OPRN/SEA 55X21

DTIC Applicable—

GIDEP Applicable—

Limitation—

Applicable Forms—

Approval Limitation—

Form VersionAPR 89

DID Formatdd_form_1664

963C CompliantNo

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

—

Description & Purpose

The Dynamic Shock Analysis Extension Request provides information required to support the shock qualifications of shipboard equipment, foundations and/or systems based upon previously approved dynamic shock analyses.

Application & Interrelationship

This Data Item Description (DID) contains the format and content preparation instructions for the data product generated by the specific and discrete task requirement as delineated in the contract.

Use & Relationship

—

Preparation Instructions

1Format.The Dynamic Shock Analysis Extension Request shall be in Contractor's format.

2Content.The Dynamic Shock Analysis Extension Request shall include the following:

2.1Identical 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:

2.1.1A copy of the Mathematical Model Report and Dynamic Shock Analysis Reportupon which the requested extension is based.

2.1.2A copy of the acceptance authority correspondencewhich conveyed approval of the previously analyzed equipment, foundation, and system. If not available, reference to the correspondence shall be identified.

2.2Similar 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:

2.2.1Detailed drawings of the tested and untested itemsand 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.

2.2.2A Mathematical Model Report and Dynamic Shock Analysis Reportupon which the requested extension is based.

2.2.3The acceptance authority correspondencewhich conveyed approval of the previously analyzed equipment, foundation, and/or system. If not available, reference to the correspondence shall be identified.

2.2.4The detailed evaluation of the design, service, orientationand installation differences of the analyzed and unanalyzed items, as required by 10.2.3 below.

2.2.5Applicable military specifications and associated datesof issue for the original analyzed item.

2.3Comparison.The Dynamic Shock Analysis Extension Request shall also include the following:

2.3.1Design differences between the new and previously analyzed item.

2.3.2Differences in shape, orientation, weight, and material composition of parts or assemblies and differences in fabrication or construction.

2.3.3Differences in allowable stress and deflection criteria.

2.3.4Differences in continuous operating loads such as torque and system pressure.

2.4Calculations.The results of engineering calculations performed in support of these requirements shall also be included. Engineering assumptions attendant to these calculations shall be stated.

References

—

Schema v3.0Community-maintained · Verify against ASSIST

Community-maintained — not an official government database.
Verify against ASSIST·GitHub·About·Disclaimer