How To Choose The Size Of The Shaker?Electromagnetic vibration shaker test
Electromagnetic vibration shaker test are designed to test the shock and vibration of products and to determine the size based on the lowest expected level of moving mass. This is especially true for large force shakers. If we test a low-mass product on a high-force shaker and calculate the maximum acceleration level, the result is a high maximum acceleration value, and the equation "Force = mass x acceleration" is the basis for determining the size of the shaker and determining whether the shaker can perform a specific shock or vibration test. The greater the mass applied to the shaker, the smaller the acceleration produced by the shaker. Conversely, the less mass applied to the shaker, the greater the acceleration it produces.
Three key factors for selecting shaker
Test type: Sinusoidal, random, shock, comprehensive test, etc
Test conditions: acceleration, speed, displacement, frequency, direction,etc
Specimen information: mass, size, center of gravity, etc
Determine the desired exciting force
The first step: according to the information of the specimen and the direction of the test, decide whether the head expander/slide table is needed;
Step 2: Pre-select a temporary shaker type, find the armature mass and the corresponding spreader/slide mass;
Step 3: Calculate the required excitation force
Formula: F = (m 1 +m 2 +m 3... +m x ) × a
Where: F - force (exciting force) (N)
m 1 - armature weight (kg)
m2 - Auxiliary table mass (head) expander or slide table) (kg)
m 3 - Mass of sample (DUT) (kg)
m x - Other (including fixtures and mounting screws) mass (kg)
a - Peak acceleration (m/s 2)
Example: The mass of the specimen is 20kg, the size is 280x280mm, the mass of the fixture is 10kg, the peak acceleration is 15g, and only the vertical direction test is required.
The pre-selected shaker model is TS10-240, the armature mass is 10kg, and the spreader VT300 mass is 10kg.
m1 - armature mass = 10 kg
m2 - Mass of head expander = 10 kg
m3 - Sample Mass (DUT) = 20 kg
mx - Other mass (kg) = 10 kg
a - Peak acceleration =15g =15 x 9.8 = 147 m/s 2
Then: F = (m1 +m2 +m3 + …+mx ) × a=（10+10+20+10）×15×9.8=7350N
The sine force of the pre-selected TS10-240 is 10kN, that is, 10000N > 8820N
Therefore, the TS10-240 can meet the customer's stress requirements. Otherwise, choose a model with more power.
Three key factors for selecting shaker
Test type: Sinusoidal, random, shock, comprehensive test, etc
Test conditions: acceleration, speed, displacement, frequency, direction,etc
Specimen information: mass, size, center of gravity, etc
Determine the desired exciting force
The first step: according to the information of the specimen and the direction of the test, decide whether the head expander/slide table is needed;
Step 2: Pre-select a temporary shaker type, find the armature mass and the corresponding spreader/slide mass;
Step 3: Calculate the required excitation force
Formula: F = (m 1 +m 2 +m 3... +m x ) × a
Where: F - force (exciting force) (N)
m 1 - armature weight (kg)
m2 - Auxiliary table mass (head) expander or slide table) (kg)
m 3 - Mass of sample (DUT) (kg)
m x - Other (including fixtures and mounting screws) mass (kg)
a - Peak acceleration (m/s 2)
Example: The mass of the specimen is 20kg, the size is 280x280mm, the mass of the fixture is 10kg, the peak acceleration is 15g, and only the vertical direction test is required.
The pre-selected shaker model is TS10-240, the armature mass is 10kg, and the spreader VT300 mass is 10kg.
m1 - armature mass = 10 kg
m2 - Mass of head expander = 10 kg
m3 - Sample Mass (DUT) = 20 kg
mx - Other mass (kg) = 10 kg
a - Peak acceleration =15g =15 x 9.8 = 147 m/s 2
Then: F = (m1 +m2 +m3 + …+mx ) × a=（10+10+20+10）×15×9.8=7350N
The sine force of the pre-selected TS10-240 is 10kN, that is, 10000N > 8820N
Therefore, the TS10-240 can meet the customer's stress requirements. Otherwise, choose a model with more power.
