Vibration, Shock, Modal and Ground Vibration Tests

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The vibration tests, shock tests, modal tests, ground vibration tests (GVT) and analyses of the mechanical/electronical/electromechanical structures and substructures that are developed in TÜBİTAK-SAGE or in other industries (i.e. aircraft industries, home appliances industries, automotive industries, space industries, ship industries, telecommunication industries, electronic industries) are performed in Vibration and Modal Test Laboratory (VMTL).

 

Vibration and Shock Tests

Vibration and shock tests are performed to determine the structural strength and the weak points of the design under the dynamic forces. The acceptability limits are determined by using civil/military standards or data acquisition under the most real operation environment. The dynamic forces are simulated in laboratory environment by using data acquisition systems, control systems, sensors, shakers and thermal chamber if needed.

 

  • Technical Specifications

  • The technical specifications of two different vibration test systems are given below:

    Vibration Test System - I

    • Random peak force : 70000 N

    • Sine peak force : 70000 N

    • Shock peak force : 140000 N

    • Frequency range : 4-2000 Hz

    • Maximum rated travel (pk-pk) : 76 mm

    • Maximum velocity (sine/random/shock) : 2/2/3 m/s

    • Maximum acceleration (sine/random/shock) : 85/85/110 g

    • Static load capacity : 1000 kg

    • Slip Table Size : 1200 mm x 1200 mm

    • Slip Table Load capacity : 10000 kg

     

    Vibration Test System - II

    • Random peak force : 20000 N

    • Sine peak force : 20000 N

    • Shock peak force : 40000 N

    • Frequency range : 4-2000 Hz

    • Maximum rated travel (pk-pk) : 76 mm

    • Maximum velocity (sine/random/shock) : 2/2/3,5 m/s

    • Maximum acceleration (sine/random/shock) : 90/90/150 g

    • Static load capacity : 300 kg

     

    Vibration and Shock Test Hardware

    • SCADAS III (16 channels).

    • SCADAS Mobile (16 channels) (8 TEDS-8 Charge)

     

    Vibration and Shock Test Software

    • LMS Test. Lab Environmental.

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  • Standards/Specifications

  • • MIL-STD-810F/G Environmental Engineering Considerations and Laboratory Tests.

    • MIL-STD-167-1 Mechanical Vibration of Shipboard Equipment.

    • MIL-STD-167-1A Mechanical Vibration of Shipboard Equipment.

    • TS EN 61587-1 Mechanical Structures for Electronically Hardware IEC 60917 and IEC 60297 Standards, Experiments Chapter: 1 Cabin, Shelf, and Frame Conditioning Experiments, Mechanical Experiments and Security Rules.

    • AOP-34 Vibration Test Method and Severities for Munitions Carried in Tacked Vehicles.

    • ASTM-D-3580-95 Standard Test Methods for Vibration (Vertical Linear Motion) Test of Products.

    • ASTM-D-4728-01 Standard Test Method for Random Vibration Testing of Shipping Containers.

    • ECSS-E-10-03A Space Engineering Testing.

    The test sample can also be tested by using other requirements and/or standards that the customer will define.

  • Applications

  • These tests can be applied to all products that are exposed to vibration in operation or in transportation.

  • Sample Specifications

  • Any test sample whose physical (dimension/weight) and test (grms, shock value, time) properties appropriate for the vibration/shock test can be used.

 

 

Modal and Ground Vibration Tests / Analysis

 

Modal tests are performed to predict the frequencies, damping properties and mode shapes of the test objects. GVT tests can be defined as the modal testing of aircraft structures. These tests are performed in laboratory by using data acquisition hardware, control hardware, sensors, modal shaker or modal hammer.

  • Technical Specifications

  • Modal shaker (7 units)

    • Sine peak force (without cooling) : 100 N

    • Sine peak force (air-cooled) : 400 N.

    Modal hammer (2 units)

    • Force (modal hammer-1) : 445 N

    • Force (modal hammer-2) : 22100 N.

    GVT soft suspension system

    Modal and GVT test hardware

    • SCADAS III (168 channels).

    Modal and GVT test software

    • LMS Test.Lab Structures

    • LMS PolyMax.

  • Applications

  • This tests/analysis can be applied to all products which are dedicated to specify the frequency, damping and mode shapes.

  • Sample Specifications

  • The modal and GVT tests can be applied on any item that the dynamic properties will be determined.