Vibration Testing - Clark Testing

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Vibration Testing

Clark Testing's Vibration Laboratory has the experience and capabilities necessary to assist you with your new and current product development. While many laboratories have the ability to identify your problem, we have the talent and experience to formulate realistic solutions and implement them within the confines of your budget and current product development schedule. For answers to your vibration problems, give us a call!

Clark Testing’s Vibration laboratory has multiple hydraulic and electrodynamic shakers making Clark Testing the ideal fit for all your testing needs. Our Vibration laboratorys' investment in new equipment has led to Clark Testing being an industry leader in Vibration Testing. Our vibration testing equipment can meet force requirements from 10lbs up to 30,000 lbs. and over a wide frequency range from 5Hz to 2,000Hz. Sinusoidal, random motion, actual time histories and machine generated shock pulses are used to satisfy the numerous vibratory environmental standards (which simulate air, sea, rail, ground transportation, pip vibration and life-cycle aging).

Our Vibration Laboratory testing hydraulic shakers include a single axis vertical shake table capable of 55,000 lbs. Force + / - 1 in Stroke, a Single Axis Shake Table capable of 30,000 lbs. Force 6" P-P Stroke and a RIM Table with the capabilities of 55,000 lbs Force, 4.95" P-P Stroke. Clark Testing also has a variety of Electrodynamic Shakers available for vibration testing which include the recently upgraded Ling 175/240. The Ling can achieve Frequency Response: 5Hz to 2,000Hz, Velocity: 70 ips, with displacement at 1.0" P-P. Clark also has a C109, C126 and a V9 Shaker available. The V9 has a frequency response of 5Hz to 2,000 and can generate 27,000 lbs. shock force.

What is Vibration Testing?

Vibration Testing is performed to examine a product's response to a defined vibration environment. Testing can measure "Fatigue Life", "Resonant Frequencies", or "Mechanical Shock". The most common type of Vibration Tests are Sinusoidal or Random.

  • Sine tests are performed to to explore the structural response of the Unit Under Test (UUT). Sine tests are performed one frequency at a time and often identify resonant frequencies within the UUT. The analysis of potential resonant frequencies can inform further design and testing of products.
  • Random Vibration tests expose the UUT to all frequencies within a defined test spectra in a given time and are generally considered to replicate a real world environment. Random Vibration Tests are used to examine transportation, expected environment, and shipping of a variety of products.
Clark Dynamic Test Laboratory provides vibration testing for the following industries:

  • Rail/Transport
  • US Military
  • Automotive
  • Transportation/Shipping
  • Medical Devices
  • Consumer Electronics/Products
Testing at Clark is performed along a single axis at a time on a variety of hydraulic and elctrodynamic shaker tables. Our commitment to maintaining and acquiring our testing equipment means that we are able to meet the testing needs of our customers. Our experienced staff is capable of working with customers to determine the appropriate test method to meet their requirements.

Common Vibration Testing Standards Include:

  • 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
  • ISO 2247:2000 Packaging – fComplete, filled transport packages and unit loads – Vibration tests at fixed low 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: Vibration, broadband random and guidance
  • IEC 61373 Cat.1 Class B: Railway applications – Rolling stock equipment – Shock and vibration tests
  • EIA-RS-186 Standard Test Methods for Passive Electronic. Component Parts. IEC Publication 68: Basic Environmental Test
  • JIS C 0040:1999 Environmental testing Part 2: Tests -- Test Fc: Vibration (sinusoidal)
  • MIL-STD 167 Department of Defense Test Method Standard – Mechanical Vibrations of Shipboard Equipment (Type I – Environmental and 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

Our Vibration Test Equipment:

    Hydraulic Shakers:

  • Single Axis Shake Table (Vertical)
    • Bare Table Weight: 6,000 lbs.
    • Table Angle: Vertical
    • Actuator: 55,000 lbs. Force 2" P-P Stroke
    • Servo valve: 70 gallons / min
  • Single Axis Shake Table (Horizontal)
    • Bare Table Weight: 4,600 lbs.
    • Table Angle: Horizontal
    • Actuator: 30,000 lbs. Force 6" P-P Stroke
    • Servo valve: 25 gallons / min
  • RIM Table
    • Bare Table Weight: 400 lbs.
    • Actuator: 55,000 lbs Force, Stroke normally utilized + 5" (Maximum Stroke 4.95" P-P)
    • Servo valve: 200 gallons / min
    • Peak Velocity 70" / second
    • Maximum Accelerations: 8 g up to 4,000 lbs. total weight on table

    Electrodynamic Shakers:

  • Ling 175 / 240
    • Frequency Response: 5Hz to 2,000Hz
    • Force: Two (2) 10,000 lbs. Thruster & One (1) up to 30,000 lbs. Sine Force
    • Velocity: 70 ips
    • Displacement: 1.0" P-P
  • C 50
    • Frequency Response: 5Hz to 2,000Hz
    • Force: 5,000 lbs. Sine Force
    • Displacement: 1.0" P-P
  • C 126
    • Frequency Response: 3Hz to 3,000Hz
    • Force: 12,000 lbs.
    • Displacement: 1.0" P-P
  • V9
    • Frequency Response: 5Hz to 3,000Hz
    • Force: 27,000 lbs. Shock Force
    • Displacement: 3.0 P-P
  • Other Test Equipment

    • Acoustic Intensity and Modal Analysis Test Equipment
    • Displacement Monitoring
    • Electrical Monitoring / Data Acquisition
    • Hi-pot / Megger Testing
    • Multi-channel Spectrum Analyzers
    • On-Site Vibration Analysis
    • Pre / Post Functional Testing

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Clark Testing has been providing product qualification testing and design verification for manufactures for over 20 years. We provide our clients with independent testing.

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