Overview of three comprehensive vibration tests:

Three comprehensive vibration test is a comprehensive test that applies three environmental stresses of temperature + humidity + vibration at the same time. The effect of comprehensive environment can reflect the performance of the product in field use more realistically and more realistically, and can expose the defects of the product.

If a single environmental stress is applied to the product, product failure can be triggered, then three different environmental stresses are applied to the product and an acceleration effect of 3-5 times can be easily achieved. At the same time, by combining different environmental stresses, faults that cannot occur when stress is applied alone can be stimulated.

When conducting a comprehensive test in which three stresses of temperature, humidity, and vibration are simultaneously applied, from the perspective of the mechanism of failure, the interior of the product undergoing temperature cycling expands and contracts due to the difference in the material expansion coefficient, and the joint parts become loose. At this time, if humidity is applied, moisture will invade from the gaps, reducing the friction coefficient of the joint and joint parts. If vibration stress is applied, resonance phenomenon of the product will still occur relative to a specific frequency. Through the repeated processes of motion, moisture absorption, freezing, and resonance like this, new failure modes (caused by a greatly accelerated failure mode of a single factor and a combined superimposed effect of the three factors) are made possible.

detection range

The triple comprehensive vibration test of temperature, humidity and vibration is widely used in complete machines and parts of aerospace, military, electrical, electronic and other products. 3. Comprehensive testing is an important test method indispensable for the entire process of product and material development, prototype testing, and product qualification testing.

testing standards

Reference for three comprehensive vibration test standards: GB/T2423.35, GB/T2423.36, IEC/EN60068-2-50;IEC/EN60068-2-51.