Structural vibration modal parameters (natural frequency, damping ratio, and mode shape) are the core indicators for evaluating dynamic characteristics and reliability. Traditional vibration modal measurement methods have obvious limitations:
1. Accelerometer arrays: Require pasting multiple sensors on the measured surface, with mass load effect, limited measurement points (restricted by channels), low spatial resolution, complex wiring, and difficult implementation for high-speed rotating components.
2. Laser Doppler vibrometers: Adopt point-by-point scanning mode, unable to capture full-field transient responses or millisecond-level impact events.
Digital Image Correlation (DIC) technology has been maturely applied in quasi-static deformation measurement. To expand it to high-speed vibration and impact fields, we need to solve problems such as high-speed image acquisition, full-field displacement extraction, and modal parameter identification.
Revealer RVM DIC software integrates a vibration modal measurement module, providing a complete measurement solution through hardware-software collaboration, realizing non-contact, full-field synchronous measurement of vibration modal parameters under high-speed rotation and transient impact conditions!
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