|Dynamics Testing Overview|
Vibration Test Lab Capabilities at Keystone Compliance
Vibration testing at Keystone Compliance’s vibration lab can generate up to 11,000 force pounds on a single shaker. Keystone Compliance personnel have performed vibration tests in excess of 100 GRMS. The staff at Keystone Compliance understands the importance of fixturing and the proper placement of accelerometers. Keystone’s investment in state of the art vibration control equipment provides the best in response limiting and control of complicated vibration profiles. The vibration controllers in our vibe lab offer tracked resonance dwell, automated response limiting to any profile, mixed mode vibration testing (sine on random testing, random on random testing), and classical and SRS shock testing.
Vibration Testing Equipment at Keystone Compliance
Keystone Compliance’s vibration test lab provides the latest in electrodynamic shaker capabilities. Our shaker capabilities provide vibration capabilities exceeding 11,000 force pounds. A large 17” diameter armature and a 4 foot x 4 foot head expander allow testing of large test articles. All of our slip tables contain hydrostatic and journal bearings to allow for testing articles with a high center of gravity in the horizontal directions.
Our AVCO SM-110 pneumatic shock machine is capable of delivering thousands of g’s to test articles weighing up to 200 pounds.
Vibration Testing Overview
Vibration testing is conducted using two basic types of tests, random vibration testing (multiple frequencies at once) and sine vibration testing (one frequency at a time).
Random Vibration Testing – A random vibration test provides all frequencies simultaneously and is considered to simulate real world movement. Random vibration tests can simulate vibration caused by different events such as operation, transportation and seismic.
Sine Sweep Vibration – A sine sweep vibration test sweeps across a frequency spectrum to determine and indentify any test article resonant frequencies.
Sine Dwell Vibration Testing – A sine dwell vibration test simulates a worst case scenario where the EUT is excited at specific resonant frequencies.
Sine-on-Random Vibration Testing – A sine-on-random vibration test is completed by superimposing a sine dwell over a random vibration profile.
Mixed Mode vibration can also provide swept sine on random and random on random vibration environments.
Vibration testing can also occur in conjunction with other testing. For instance, combined environment vibration is the simultaneous testing of an EUT to vibration and environmental conditions.
Vibration Testing Lab Process
Vibration testing is conducted on an electrodynamic shaker system. To complete the shock and vibration test, the EUT is fixtured to the vibration table. Fixture design is a critical step as the fixture should be as resonance free as possible. Eliminating low frequency resonance and enabling control of complicated vibration profiles is crucial to vibration fixture design.
Keystone Compliance is a professional vibration lab capable of performing the most common shock and vibration testing. Contact us to determine how we can help you meet your vibration test requirements.
Vibration Testing Specifications
- ASTM D999-01 Standard Test Methods for Vibration Testing of Shipping Containers
- ASTM D3580 – 95(2010) Standard Test Methods for Vibration (Vertical Linear Motion) Test of Products
- ASTM D4728 – 06 Standard Test Method for Random Vibration Testing of Shipping Containers
- EN 61373 Section 9.0 Vibration
- ISO 2247:2000 Packaging – Complete, filled transport packages and unit loads – Vibration tests at fixed low frequency
- ISO 8318:2000 Packaging – Complete, filled transport packages and unit loads -Sinusoidal vibration tests using a variable frequency
- ISO 9022-10:1998 Optics and optical instruments – Environmental test methods – Part 10: Combined sinusoidal vibration and dry heat or cold
- ISO 9022-15:1998 Optics and optical instruments – Environmental test methods – Part 15: Combined digitally controlled broad-band random vibration and dry heat or cold
- ISO 9022-19:1994 Optics and optical instruments — Environmental test methods – Part 19: Temperature cycles combined with sinusoidal or random vibration
- IEC 60068-2-64 Environmental testing Part 2: Test methods –Test Fh: Vibration, broad- band random (digital control) and guidance
- EIA-RS-186 Standard Test Methods for Passive Electronic. Component Parts. IEC Publication 68: Basic Environmental Test
- JIS C 0040 Japanese spec for vibration
- MIL-STD 167 Department of Defense test method standard – Mechanical vibrations of shipboard equipment
- Type I – Environmental
- Type II – Internally-Excited
- MIL-STD-202 Electronic and Electrical Component Parts
- MIL-STD-750 Test Methods for Semiconductor Devices
- MIL-STD-810 Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests
- NAVMAT P-9492 Navy Manufacturing Screening Program that provides guidance concerning the use of temperature cycling and random vibration as manufacturing screens for defects in both parts and workmanship.
- RTCA DO-160 Section 8 Vibration