Magnetoelastic Ribbons as Vibration Sensors for Real-Time Health Monitoring of Rotating Metal Beams

Area of Science:

• Materials Science
• Mechanical Engineering
• Structural Health Monitoring

Background:

• Rotating blades are critical components in many engineering applications.
• Non-destructive methods are needed for real-time monitoring of blade mechanical health.
• Magnetoelastic materials offer potential for vibration sensing applications.

Purpose of the Study:

• To investigate the use of magnetoelastic material ribbons as vibration sensors for rotating beam blades.
• To assess the real-time, non-destructive monitoring capabilities of these sensors.
• To evaluate the sensors' ability to detect blade damage.

Main Methods:

• Utilized Metglas alloy 2826 MB ribbons as magnetoelastic sensors.
• Conducted experiments in two stages: intact blades and damaged blades.
• Employed Fast Fourier Transform (FFT) for signal analysis and ANSYS for modal analysis validation.

Main Results:

• Sensors accurately detected and transmitted the vibration behavior of intact rotating blades.
• Five dominant peaks corresponding to the first five bending modes were identified (0-3 kHz).
• Introduced damages (cuts, holes) caused measurable shifts in bending mode frequencies, indicating sensor sensitivity to mechanical changes.

Conclusions:

• Magnetoelastic sensors can accurately monitor the mechanical health of rotating blades in real time.
• The sensors effectively detect and transmit vibration data, enabling health state assessment.
• Frequency shifts in vibration modes serve as indicators of blade damage.