Sine vibration testing is a commonly used experimental method in laboratories and is one of the most well-known types of vibration. For example, any vibration resulting from rotation, pulsation, or oscillation (as encountered in ships, aircraft, vehicles, and spacecraft) is a sine vibration. To simulate these vibration environments, sine vibration testing is undoubtedly necessary.
In the development process of vibration testing, sine vibration was initially used, starting with fixed-frequency vibration and later progressing to swept-frequency vibration. Regarding swept-frequency vibration, it began with linear sweeping and gradually evolved into the current logarithmic sweeping.
The purpose of sine vibration testing is to simulate the sine vibration that products may encounter during transportation, storage, and usage, as well as its associated effects.
The main applications of sine vibration include:
- Simulating vibrations with periodic excitation sources.
- Determining the resonant frequencies of structures.
- Assessing the fatigue strength of test specimens.
- Adding to random vibrations to generate vibrations that simulate actual environments.
The test conditions (severity level) for sine vibration testing are determined by the three parameters: frequency, amplitude, and test duration.