MIL-STD-167-1A
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use.
a. This standard is used to qualify shipboard equipment for the environmental vibrations and internally excited vibrations encountered during operation of the equipment aboard ship.
b. In some special machinery, equipment, or installations (such as antennae, large machinery items, and certain unique designs), it may be necessary to deviate from this standard.
c. Type I vibration testing is intended to qualify new equipment for exposure to shipboard vibrations during the lifetime of the ship.
d. The primary purpose of Type I vibration testing is to prove the physical and functional integrity of equipment when subject to a prescribed steady-state vibration environment. The results of the application of this standard do not provide a definitive determination of the tested item's natural frequencies and mode shapes.
e. This standard does not cover vibrations associated with reciprocating machinery or those associated with propulsion and shafting. For these types, see MIL-STD-167-2.
f. The primary purpose of the application of this standard to Type II vibrations is from the standpoint of mechanical suitability, and not from a structureborne noise standpoint. See MIL-STD-740-2 for noise suitability of equipment.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of the standard.
b. Reporting requirements, including requirements for Notification of Test, Equipment Test Plan, and/or Test
Report (see 4.1, 5.1.2.5.1, and 5.1.2.5.2).
c. Identification of component compliance on component drawing, in Test Report, or on label plate (see 4.2). d. Disposition of tested equipment and related material (see 4.3).
e. Type(s) of vibration required (see 5.1 and 5.2). f. Type I:
(1) How the equipment will be operated after the test to demonstrate the machinery or equipment has no damage from the test, including acceptable operational degradations (see 5.1.1 and 5.1.2.4.1).
(2) Whether the test engineer needs concurrence of the procuring agency for determination of major vs. minor failures before continuing testing (see 5.1.1).
(3) Whether measurement transducer locations need to be approved by the procuring agency for Type I
testing (see 5.1.2.2).
(4) Methods of mounting equipment for test (see 5.1.2.3.4).
(5) Whether internal mounts should be installed for all, a specific part, or none of the test (see 5.1.2.3.5). (6) How equipment will be energized or operated during Type I vibration tests (e.g., pressure, flow rate,
voltage current, and cycling of principal functions during testing), including acceptable operational degradations (see 5.1.1 and 5.1.2.4.1).
(7) When required, the maximum test frequencies (see 5.1.2.4.4). (8) Alternative test amplitudes (see 5.1.2.4.5).
(9) Whether approval is required for selection of frequencies used for endurance testing (see 5.1.2.4.6 and 5.1.2.4.7).
(10) The acceptance authority for the test report and any other approval items (see 5.1.2.5.1 and 5.1.2.5.2).
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