3G vibration testing- ANSI C136 31 shaker testing

3g vibration testing is designed to determine the ability of lighting fixtures to withstand extreme environments. The test is a mechanical performance evaluation, ANSI C136 31 is the national standard for road and district lighting equipment in the United States, covering the minimum vibration resistance and shaker testing methods for road lamps and district lamps, according to the study concluded that rod mounted lamps in a typical installation of the vibration strength of less than 1g force, Devices mounted on overpasses or Bridges can withstand forces of up to 2g. The essence of this “validation test” is to determine the ability to meet the dynamic strength criteria, rather than to determine the final failure value. It is a mechanical performance test designed to simulate endurance in a relatively short period of time, and the ANSI standard contains the now common 3G vibration testing acceleration grades.

Types of vibration testing

Wind induced vibration

In a lighting system consisting of lamps, poles, and pole assemblies, wind can cause vibrations. The size of this vibration is mainly a function of the size, shape and stiffness of the luminaires and pole system, as well as the damping of the system.

Traffic induced vibration

Vibrations caused by traffic can be transmitted from the road, bridge or overpass generated by the vehicle to the lighting system. Similar vibrations can occur in areas near heavy power equipment.

3G vibration testing program

The ANSI standard includes the now common acceleration levels for 3G tests. If the luminaire is to be placed on a bridge or overpass, the luminaire system should be tested at 3.0G. All other applications of the luminaire system should be tested at 1.5G.

The luminaire should be attached to a vibration slip table, able to withstand the loads and forces encountered during testing, and tested in a manner that simulates normal installation. The luminaire should vibrate at or near the fundamental resonant frequency, which should be determined for each of the three mutually perpendicular planes (x, y, and z), and should be between 5 and 30 Hertz. The acceleration intensity measured at the center of gravity of the luminaire shall be specified according to the corresponding table. Table 1 applies to normal road applications. Table 2 applies to Bridges and overpasses. When conducting shaker testing, frequency and displacement should be monitored, and significant changes in frequency or displacement are signs of structural failure. The luminaire shall be able to withstand the described vibrations 100,000 times on each plane. Individual sample luminaires can be used for each plane to eliminate the effects of fatigue in the connecting materials. Additional test ranges and durations can be negotiated by the specification and supplier as needed to simulate extreme fatigue. At the end of the test, the housing must not be damaged, the electrical spacing must not be reduced, and no part of the luminaires must be loosened. Any damage that could cause a safety issue constitutes a test failure. A broken lamp does not constitute a test failure.

JOEO vibration shock test

As a leading industrial shaker table manufacturer in Asia with multiple vibration testing system and extensive experience in shaker testing, JOEO has developed expertise in luminaire vibration testing in compliance with standards such as ANSI C136.31. Our engineers not only test the equipment correctly, they also provide detailed feedback and troubleshooting. In addition to providing professional lamp shaker testing, our laboratory also provides all the electromagnetic compatibility testing required for lamps. To get the lamp 3G vibration testing, submit the following expression, contact us now！