Integrate vibration damping materials and shock absorbers early in the design phase.
Because MIL-STD-167-2A covers critical propulsion systems, it is classified under . This means public access may be restricted depending on the specific agency or defense contract context. To source it legally and securely:
: Specifically addresses Type III (Reciprocating Machinery), Type IV (Propulsion System), and Type V (Shafting) vibrations.
Type III (Torsional), Type IV (Longitudinal), Type V (Lateral) mil-std-167-2a pdf
: Covers internally excited and externally imposed vibrations for propulsion-related hardware. Vibration Types Covered
| Test Type | Frequency Range | Amplitude | Duration | |-----------|----------------|-----------|----------| | | 2 Hz – 50 Hz (sweep log or linear) | 0.02 in (0.5 mm) displacement or 0.5g acceleration (whichever is less) | 2 hours per axis (3 axes) | | Type II – Internally Excited | Based on equipment’s own operating speeds (e.g., 10% to 120% of rated RPM) | Varies with rotating mass & imbalance | Until resonance effects are characterized |
This regulates the side-to-side vibration of the propulsion shafting. Importance of MIL-STD-167-2A Compliance To source it legally and securely: : Specifically
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Manufacturers must verify their equipment's resilience through rigorous testing protocols to receive certification. Testing typically involves:
: Vibrating equipment at 1 Hz intervals to find specific response prominences. Importance of MIL-STD-167-2A Compliance mil-std-167-2a pdf
The standard outlines specific parameters that must be evaluated during design and testing. Compliance usually requires mounting the equipment on a specialized vibration testing machine and subjecting it to rigorous testing profiles: 1. Exploratory Vibration Test
This section defines exactly what types of equipment fall under the jurisdiction of 167-2A. It generally applies to all machinery installed on U.S. Navy surface ships and submarines that generate or are exposed to reciprocating or torsional forces. 2. Applicable Documents
The official U.S. Department of Defense source for military specifications and standards.