NPFC - MIL-STD-167-1
MECHANICAL VIBRATIONS OF SHIPBOARD EQUIPMENT (TYPE I - ENVIRONMENTAL AND TYPE II - INTERNALLY EXCITED)
Organization: | NPFC |
Publication Date: | 1 May 1974 |
Status: | inactive |
Page Count: | 16 |
scope:
This standard covers the requirements of Naval equipment including machinery as regards both internally excited vibrations and externally imposed vibrations. In some special machinery, equipment, or installations, such as antennas, large machinery items, and certain unique designs it may be necessary to deviate from this standard. In those cases, special modifications shall be subject to approval by the command or agency concerned. All other deviations from, or waivers of this standard, are prohibited.
The purposes of this standard are to aid in the choice of and ensure consistence in vibration requirements for equipment. The command or agency concerned should require conformance only to those sections of this standard applicable to the equipment concerned in a particular procurement document. For example, specifications for electronic equipment would normally only refer to type I, while those for a diesel propulsion system would also refer to types III, IV, and V of MIL-STD-167-2.
Mechanical vibrations of shipboard equipment are of three general categories: (a) those of the environment, (b) those arising from internal excitation (balance), and (c) those associated with reciprocating machinery and propulsion system and shafting. Category (c) is covered in MIL-STD-167-2. Categories (a) and (b) are covered herein and are classified under the following types:
Type I - Environmental vibration. This type applies to all equipment intended for shipboard use or which must be capable of withstanding the environmental vibration conditions which may be encountered aboard naval ships.
Type II - Internally excited vibration. This type applies to all rotating machinery which must operate smoothly from the standpoint of mechanical suitability. This does not apply to suitability from a noise standpoint nor does it apply to reciprocating machinery.
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