The standard requires rigid mounting to the shaker head. You must use a fixture that replicates the ship’s deck stiffness. Do not use rubber isolators during the test.
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| Feature | MIL-STD-167-2A | MIL-STD-810H (Method 514) | | :--- | :--- | :--- | | | Navy Shipboard (Surface & Submarine) | General Military (Ground, Air, Sea) | | Frequency Range | 2 Hz to 50 Hz (often extended to 200 Hz) | 5 Hz to 500 Hz+ | | Duration | 2 hours per axis (Typically) | 1 hour per axis (Typical) | | Key Focus | Low-frequency, high-displacement vibration from hull flex | Broadband transport and operational vibration | | Contractual Use | Mandatory for Navy shipboard equipment | Optional unless specified by Navy | The standard requires rigid mounting to the shaker head
Equipment tested for submarines (SSN/SSBN) requires a note that the vibration test is performed at ambient humidity, but the equipment must be designed for 100% condensation. The PDF does not cover this—it is in a complementary NAVSEA instruction. Conclusion: Master the Standard Before You Test The mil-std-167-2a pdf is more than a file; it is a contractually binding requirement for any equipment that vibrates aboard a U.S. Navy vessel. Whether you are testing a pump, a radar array, or a power supply, understanding the distinction between Type I and Type II vibration, securing an official PDF from ASSIST, and executing a proper resonance search will save you from costly test failures and program delays. Navy vessel
Searching for a "mil-std-167-2a pdf" is the first step for many mechanical engineers, test technicians, and procurement specialists. However, simply finding the PDF is not enough. You need to understand its scope, how it differs from other vibration standards (like MIL-STD-810), and how to correctly apply its test procedures.