DI-ENVR-82491
Vibration and High Cycle Fatigue Analysis Report
The Vibration and High Cycle Fatigue Analysis Report describes the approach for establishing vibration environments and predicting strength and fatigue life of airframe structures for air vehicle design.
Approval DateJuly 9, 2025
AMSC NumberF10577
Preparing Activity11 (AFLCMC/EZFS)
Project NumberENVR-2025-011
OPR—
DTIC ApplicableNo
GIDEP ApplicableNo
Limitation—
Applicable Forms—
Approval Limitation—
Form Version—
DID Formatfree_text
963C CompliantYes
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Application & Interrelationship
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Use & Relationship
The Vibration and High Cycle Fatigue Analysis Report describes the approach required for establishing the vibration environments of the structure and equipment and predicting the strength and fatigue life of airframe structures subjected to these environmental loads. This analysis report supports the design of the air vehicle.
a. This Data Item Description (DID) is applicable to any contract for which an air vehicle is under development, a modification is made, or an Environmental Criteria Document (ECD) is required.
b. This DID contains the format, content, and intended use information for the data deliverable resulting from the work task described in section 5 of MIL-STD-1530, Aircraft Structural Integrity Program (ASIP) (copies of this document are available online at https://quicksearch.dla.mil).
c. This DID supersedes DI-ENVR-82121, Vibration and Acoustic Analyses Reports - Air Vehicle (copies of this document are available online at https://quicksearch.dla.mil).
Preparation Instructions
1Reference Documents.The applicable issue of the documents cited herein, including their approval dates and dates of any applicable amendments, notices, and revisions, shall be as specified in the contract.
2Format.The Vibration and High Cycle Fatigue Analysis Report shall be in the contractor's format.
3Content.The Vibration and High Cycle Fatigue Analysis Report shall describe the contractor's analysis associated with the design for vibration environments and shall include the following:
3.1Vibration Loads and Environmental Analysis, to include:
3.1.1Approach used to establish the vibration loading and environmental exposure of structure and equipment for ground and flight operations.
3.1.2Descriptions of all sources of vibration resulting from the operation of propulsion and other power systems, gusts, wakes, oscillating shocks, and other aerodynamic disturbances, Mach effects, ground operations, missile and rocket launches, and gun fire.
3.1.3Substantiation of any design provisions employed to control vibration load levels.
3.1.4Predicted levels for harmonic, transient, and random vibration sources or combinations of sources with graphs, calculations, data tables, etc., in sufficient detail to derive the exposure of the system by physical location and with sufficient frequency resolution to evaluate local design features.
3.1.5Description of the vibration loading with graphs and tables that define the loading as a function of frequency and exposure time.
3.1.6Relevant service environment details that contribute to the vibration loading and resulting service life, including temperature, humidity levels, and cabin pressurization.
3.1.7Description of analysis tools and models.
3.1.8Usage data in terms of mission types, mission mix, storage, and transportation used to develop the repeated loads and environmental spectra for use in the service life analysis.
3.1.9Descriptions of the theories, methods, and assumptions used to modify vibration levels to support the accelerated testing procedures.
3.2Fatigue Analysis, to include:
3.2.1High cycle fatigue analysis methodology and validation results used to design the air vehicle structure and equipment subjected to vibration loading.
3.2.2Description of analysis tools and analytical models.
3.2.3Fatigue life predictions of all vibration sensitive structure and equipment and all supporting calculations and data, such as: loads-to-stress transfer functions, material properties, and transmissibility factors
3.2.4Usage data in terms of mission types, mission mix, storage, and transportation used to develop the repeated loads and environmental spectra for use in the service life analysis.
3.3Analysis Correlation, to include:
3.3.1Comparison of pre-test analysis predictions to the vibration, environmental, and high cycle fatigue test data.
3.3.2Analysis results and correlation of the analytical tools used in the vibration, environmental, and high cycle fatigue analysis.
3.3.3Comparison of the vibration, environmental, and high cycle fatigue test results with previous design levels and qualification test requirements.
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