Vibration test is to artificially simulate the impact of various vibration environments encountered by products (General Electrical and electronic products) in the process of storage, transportation, installation and use in the laboratory, so as to evaluate whether the products can withstand various environmental vibration, whether they can be used normally and without failure.
Test purpose
Vibration test can analyze and evaluate the reliability of the product before the product officially leaves the factory, reduce the probability of defective products in the later stage, and determine the requirements and standards of product design and function.
Scope of application
There are many requirements for vibration testing of electrical and electronic products, because most electronic products belong to precision products, such as mobile phones, flat plates, etc. the internal structure and components are relatively precise, and the vibration environment has a great impact on them. It is necessary to ensure the impact of Vibration Factors on product reliability.
Vibration test classification
Reliability vibration test is generally divided into two types, sinusoidal vibration test and random vibration test. Sinusoidal vibration is a test method often used in the laboratory. It mainly simulates the vibration generated by rotation, pulsation and vibration (on ships, aircraft, vehicles and space vehicles), as well as the resonance frequency analysis and resonance point residence verification of product structure. It is also divided into sweep frequency vibration and constant frequency vibration. Its severity depends on the frequency range, amplitude value Test duration. Random vibration is used to simulate the seismic strength evaluation of product integrity structure and the transportation environment in the packaging state. Its severity depends on the frequency range, GRMS, test duration and axial direction.
1. Sinusoidal vibration test: the test applies sinusoidal vibration to the test piece, which can be sinusoidal constant frequency or sinusoidal sweep frequency vibration test.
2. Random vibration test: the test applies random vibration to the test piece, which is divided into broadband random vibration test and narrowband random vibration test according to the frequency width of random vibration.
Method standard
Sinusoidal vibration: GB / T 2423.10 IEC 60068-2-6 en 60068-2-6 ISO 8318 GB / T 4857.10 ISO 2247 GB / T 4857.7
Random vibration: GB / T 2423.56 IEC 60068-2-64
Test parameters
Parameters of shaking table: maximum thrust, maximum acceleration, maximum speed, maximum displacement, size and weight of vibrating table, resonance frequency of table and frequency range of shaking table.
