MIL-STD-740-2 Structure Dependent Vibration Acceleration Measurements and Acceptance Criteria for Ship Equipment

MIL-STD-740-2, a United States military defense standard, describes specific warning sign requirements and drawing and manual information requirements for ship equipment. This standard is designed for use in equipment acquisition testing.

This standard contains instrumentation and procedures for measurement and analysis and maximum acceptable level criteria for structure induced vibration acceleration produced by ship equipment. In order to prove that the equipment levels are within the limits specified here, a structure-borne sound test is applied.

This standard defines specifications and similar documents applicable to ship equipment.

The primary method used in this standard to determine equipment acceptance is to measure the vibration acceleration level from the structure in decibels.

The equipment is acceptable if none of the structure-induced vibrational acceleration levels measured using accelerometers at the designated location exceed the applicable structure-induced acceptance criteria.

Especially when there is a strong vibration source such as a motor pump, rigorous vibration isolation is needed in machine installations to achieve maximum performance or to meet certain criteria. For passenger comfort in vehicles, ships and trains or for the protection of sensitive electronic equipment, it is absolutely necessary to prevent the transmission of these vibrations to other parts of the system. For this reason, it is important to improve vibration isolation in the defense sector as well.

Essentially, this standard for measuring acoustic noise emanating from a sample via a mechanical structure or air consists of two parts:

• Airborne sound is typically measured according to the MIL-STD-740-1 standard. The basic unit of measurement for airborne noise is sound power. Sound pressure measurements are often recorded and sound power is calculated from the measurements.
• Structure-borne sound is typically measured according to the MIL-STD-740-2 standard. The basic method for measuring structure-borne noise is the measurement of vibration acceleration induced by equipment. Generally, the equipment is mounted flexibly and triaxial measurements are made at each of the mounting points.

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of MIL-STD-740-2 standard, vibration acceleration measurements of ship equipment and testing for acceptance criteria. also provides services.