The standard is intended to ensure that this machinery can operate reliably in military environments without causing structural failure, excessive bearing wear, or noise issues. Types of Vibration Covered (III, IV, & V)
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
MIL-STD-167-2A: Mechanical Vibrations of Shipboard Equipment
Prevents fatigue failure in propulsion components. mil-std-167-2a pdf
This standard applies to all shipboard equipment, including:
Maintain meticulous records of testing, including resonance dwells and functional tests.
Forward and backward vibrations within the propulsion systems. The standard is intended to ensure that this
Reciprocating machinery, main propulsion systems, shafting, and gears
MIL-STD-167 defines five distinct types of mechanical vibrations that shipboard equipment must withstand:
| Feature | MIL-STD-167-1A | MIL-STD-167-2A | | :--- | :--- | :--- | | | Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited) | Mechanical Vibrations of Shipboard Equipment (Reciprocating Machinery and Propulsion System and Shafting) Types III, IV, and V | | Scope | General shipboard equipment exposed to environmental vibration from the sea or internal excitation from rotating components | Reciprocating machinery and the propulsion system itself, covering torsional, longitudinal, and lateral vibrations of shafts and gears | | Vibration Types | Type I (Environmental), Type II (Internally Excited) | Type III (Torsional), Type IV (Longitudinal), Type V (Lateral/Whipping) | | Primary Application | Qualifies mounted equipment and components for operational durability | Ensures the mechanical integrity and safety of the ship's main propulsion system | main propulsion systems
These sections are critical for ensuring that propellers and shafting systems do not fail due to resonant conditions.
. It establishes requirements for equipment installed on naval ships with conventional shafted propulsion systems. ASSIST-QuickSearch Basic Search (.mil) Key Objectives & Scope
