MIL-STD-740 -2

Abstract

This standard prescribes instrumentation and procedures for the measurement and analysis of, and maximum acceptable level criteria for structureborne vibratory acceleration generated by shipboard equipment. <br>Structureborne sound testing is conducted to demonstrate that equipment levels are within the limits specified herein. <br>This standard supplements specifications and similar documents applicable to shipboard equipment. <br>Implementation guidance is provided in section 6. <br>The basic method used in this standard to determine equipment acceptance is the measurement of the structureborne vibratory acceleration level (L_a) in decibels (dB). Measurements are required at the locations of 5.3.2 for use in guiding maintenance. <br>Structureborne acceptance criteria are specified in <a>5.1</a>. <br>Equipment is acceptable when none of the structureborne vibratory acceleration levels measured using accelerometers at the designated location exceed the applicable structureborne acceptance criteria. <b><u>Intended Use:</u></b> This standard is intended for use for equipment acquisition testing. This standard also prescribes certain warning plate requirements and drawing and manual information requirements for shipboard equipment (see <a>5.11</a> and <a>5.12</a>). <br>