Vibration testing is simulating the vibration environment by the shaker in the laboratory, introducing force function into the UUT to test the response of the UUT to a defined vibration environment. Vibration testing is performed to test the product's durability, integrity, fatigue life, and resonant frequencies.
As one of the most professional vibration shaker manufacturers in China, CME offers mechanical vibration shakers worldwide.
There are three types of shaker systems—electrodynamic (ED) shaker, servo-hydraulic (hydraulic) shaker, and mechanical shaker. CME offers hydraulic vibration shaker for sale. The major specifications to consider are frequency range, displacement, acceleration, tested axes, payload and vibration/shock levels, and force rating. Since mechanical shaker can only test sine and was out of date, we discuss the other two types.
For relatively low-frequency vibration (typically less than 200 Hz), the servo-hydraulic shaker is adopted. An electrodynamic shaker is used for higher frequencies (typically 5 Hz to 2500 Hz). ED shaker's displacement is under 51mm (P-P), while hydraulic shaker can be up to 100mm (P-P). Moreover, if it’s a significant force test, the hydraulic shaker will be the cost-effective choice.
There are three types of mechanical vibration shaker systems—electrodynamic (ED) shaker, servo-hydraulic (hydraulic) shaker and mechanical shaker. The major specifications to consider are frequency range, displacement, acceleration, tested axes, payload and vibration/shock levels, and force rating. Since mechanical shaker can only test sine and was out of date, we discuss the other two types.
For relatively low-frequency vibration (typically less than 200 Hz), servo hydraulic shaker is adopted. Electrodynamic shaker is used for higher frequencies (typically 5 Hz to 2500 Hz). ED shaker’s displacement is under 51mm (P-P), while hydraulic shaker can be up to 100mm (P-P). Moreover, if it’s a significant force test, the hydraulic shaker will be the cost-effective choice.
Sine
Random
Resonant search & dwell
Sine on Random
Random on Random
Sine & Random on Random
SRS (Shock Response Spectrum) Analysis
To select a suitable shaker to do a vibration test, we should know the following parameters:
-UUT Size & Weight (including fixture)
-Frequency Range and Waveforms
-Displacement and Acceleration
-Test Direction
-Target Vibration Test Profile
Yes, if it's the low level (acceleration) and wide pulse duration shock test, e.g.: 4g@50ms, using a vibration shaker is the best choice.
0.1Hz
Vibration test using the 1-inch fixed displacement method, peak-to-peak, at a predetermined frequency for the ISTA 1A and 1B procedures.
The 1C, 1D, and 1E procedures require a vibration test using two alternative methods: fixed linear vertical displacement or random vibration.
Instead, for procedures 1G and 1H, the testing sequence requires a random vibration test. For the 2A and 2B procedures, the testing sequence outlines two testing procedures: the fixed-displacement vibration test and the random vibration test. However, the ISTA 2C procedures require a random vibration test under dynamic load. The ISTA 3A procedure is composed of different types of tests depending on the package to be tested (standard, small, flat, or elongated) and its characteristics. In the case of vibration tests, the performance of a random vibration test with or without top load is required for all types of packages. Optionally, a random vibration test at low pressure may be performed.
The ISTA 3B procedure requires the performance of a random vibration test with the top load. However, protocols ISTA 3E and 3H also require the performance of a random vibration test, but without a top load in this case.
Project 3K requires a random vibration test. A random vibration test with or without top load.
