MIL-STD 167 specifies procedures and establishes requirements for environmental and internally excited vibration testing of Naval shipboard equipment installed on ships with conventionally shafted propulsion. The test methods specified are applicable to shipboard equipment subjected to mechanical vibrations from the environment and from internal excitation caused by unbalanced rotating components of Naval shipboard equipment. MIL-STD 167-2 covers mechanical vibrations associated with reciprocating machinery and lateral and longitudinal vibrations of propulsion system and shafting.
The following types of vibration are covered in this standard:
Type I – Environmental Vibration
Type II – Internally Excited Vibration
Type I – Environmental Vibration. When Type I vibration requirements are specified, the equipment shall be subjected to a simulated environmental vibration as may be encountered aboard naval ships. This standard provides an amplitude sufficiently large within the selected frequency range to obtain a reasonably high degree of confidence that equipment will not malfunction during service operation.
a. For Type I vibration testing, this standard shall be used for equipment subjected to the vibration environment found on Navy ships with conventionally shafted propeller propulsion. Type I vibration testing shall not be applicable to high-speed or surface-effect ships that are subject to vibrations from high-speed wave slap, which produce vibration amplitudes and frequencies in excess of the levels on conventional Navy ships.
b. This standard applies to Type I vibration testing for equipment used in Navy ships with conventionally shafted propeller propulsion, and is not necessarily applicable to water jet, podded, or other propulsion types, including those that have been designed to minimize blade-rate forces.
c. For equipment installed on ships with propulsion systems with frequency ranges not covered by Table I of the standard, MIL STD 167 shall not apply.
Type II – Internally Excited Vibration. Type II balance and vibration requirements shall apply to the procurement of rotating machinery, unless otherwise specified. This does not apply to suitability from a noise standpoint, nor does it apply to reciprocating machinery. Special vibration and balance requirements may be specified. The limitations set forth herein may also be used as criteria on overhaul tolerances, but should not constitute a criterion for the need for overhaul.
MIL-STD-167 is revised periodically. The existing versions of the standard include MIL-STD-167/1 and MIL-STD-167/1 A.
Keystone Compliance assists manufacturers with MIL-STD-167 compliance. This page lists every method and section of the standard for informational purposes. There may be methods and sections that fall outside of our scope. Please contact us for more information on how Keystone Compliance can assist you with identifying and fulfilling your MIL-STD-167 needs.