PLASTLAB LAB TESTS
VIBRATION TESTS
A body vibrates when it describes an oscillatory motion around a reference position.
Vibration tests represent those tests, performed in the laboratory, which try to simulate, under controlled conditions, the vibrating load applied to the device under test (D.U.T.) according to reference ‘standards’ in order to evaluate its performance in the various phases of its development. Vibration tests are essential for detecting malfunctions, potential weaknesses and for monitoring the behavior of a sample.
Electrodynamic, Hydraulic and Mechanical
The system present in Plastlab is an electrodynamic shaker, most commonly used for vibration tests, it uses the same operating principle as a loudspeaker: A mobile coil, crossed by AC current, is immersed in a magnetic field; as the current circulating in the coil varies, a force is generated perpendicular to the direction of the current and to the direction of the magnetic field flux lines. The resulting force on the coil is proportional to the strength of the magnetic field and to the strength of the current itself; therefore as the direction of the current changes, it will change the direction of movement of the voice coil.PERFORMANCE CHARACTERISTICS
Maximum force 45 KN frequency range from 5÷2400 Hz equipped with single or double stage climatic chamber (temperature range -70÷180°C).
Sine vibration profiles
Setting of the vibration profile in sinusoidal mode, test suitable for components subject to harmonic vibration sources, such as motors and rotating machines.
Shock vibration profiles
Test capable of simulating impact conditions such as predictable accidental phenomena.
Random vibration profiles
Vibrations of a causal type, that is of a non-repetitive and predictable type, for example simulating the movement of the vehicle on the road or of a plane in flight.
Temperature test
The vibration tests can also be performed in combination with the 1200 L climatic chamber in a temperature range from -70°C to +180°C, in order to simulate all the conditions indicated above with changes in temperature and humidity.
