: Specifically addresses Type III (Reciprocating Machinery), Type IV (Propulsion System), and Type V (Shafting) vibrations.
and other DoD agencies for the acquisition and testing of mission-critical shipboard hardware. Testing Types: mil-std-167-2a pdf
Testing for lateral and longitudinal vibrations. Type IV (Propulsion System)
: Specialized vibration requirements for propulsion systems and shafting. Testing and Acceptance Criteria mil-std-167-2a pdf
| 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 |
Place control accelerometers on the mounting points. Place response accelerometers on heavy internal components (transformers, contactors, PCBs).