Mil-std-167-2a Pdf Access
MIL-STD-167-2A is a United States military standard that establishes the requirements for the mechanical vibrations of naval shipboard equipment. Specifically, Revision A (dated May 21, 1992) focuses on reciprocating machinery , propulsion systems, and shafting. Key Overview of MIL-STD-167-2A MIL-STD-167-1A
- 2–7.5 Hz: Constant amplitude of 0.030 inches double amplitude (peak-to-peak)
- 7.5–50 Hz: Constant acceleration of 0.4 g (peak)
Type IV: Longitudinal Vibration
Focuses on the twisting stress that can snap shafts or damage gears. mil-std-167-2a pdf
For more details, visit the full specifications at [1] NSWC Philadelphia Division and [2] DLA Land and Maritime. MIL-STD-167-2A is a United States military standard that
: Torsional vibrations from reciprocating machinery and propulsion systems. : Longitudinal vibrations in propulsion systems. : Lateral vibrations in propulsion systems. Type IV: Longitudinal Vibration Focuses on the twisting
- Vibration Limits: The standard sets limits for vibration levels on shipboard machinery, including maximum allowable amplitudes, velocities, and accelerations.
- Noise Limits: MIL-STD-167-2A establishes noise level limits for various shipboard spaces, including machinery rooms, mess halls, and berthing areas.
- Design and Testing: The standard requires that shipboard machinery be designed and tested to minimize vibration and noise. This includes consideration of factors such as balancing, alignment, and foundation design.
- Instrumentation and Measurement: The standard specifies the instrumentation and measurement techniques to be used for vibration and noise testing.
- False acceptance of equipment: Non-tested gear may pass initial inspection but fail during sea trials.
- Contract rejection: The Navy’s Quality Assurance (QA) teams will reject non-compliant hardware.
- Operational risk: Shipboard vibration has historically caused solder joint cracking, relay chattering, structural fatigue, and improper operation of weapons systems.
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