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Modeling Full-Field Transient Flexural Waves on Damaged Plates with Arbitrary Excitations Using Temporal Vibration
Dan-Feng Wang1, Kuo-Chih Chuang1, Jun-Jie Liu2
1Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, School of Aeronautics and Astronautics, Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027, China.
Sensors (Basel, Switzerland)
|August 26, 2022
Summary
This study introduces a semi-analytical method to model flexural wave propagation in cracked plates. The technique uses vibration characteristics and Laser Doppler Vibrometer (LDV) validation to reveal crack information.
Area of Science:
- Structural health monitoring
- Vibrational mechanics
- Non-destructive testing
Background:
- Cracked plate structures pose challenges for wave propagation analysis.
- Accurate modeling of flexural waves is crucial for damage detection.
- Existing methods may lack efficiency or broad applicability.
Purpose of the Study:
- To develop an efficient semi-analytical method for modeling flexural wave propagation in cracked plates.
- To analyze the influence of damage on wave propagation paths.
- To validate the method using experimental data.
Main Methods:
- Superposition of vibrational normal modes for transient wave propagation analysis.
- Integration of a vibration-based transient model with power flow analysis.
- Experimental validation using a non-contact scanning Laser Doppler Vibrometer (LDV) system.
Main Results:
- The proposed method accurately models flexural wave propagation in cracked plates.
- The influence of damage on wave propagation paths was successfully analyzed.
- Experimental results confirmed the method's capability to reveal crack information.
Conclusions:
- The developed semi-analytical method provides an efficient approach for modeling flexural waves in cracked structures.
- This technique enables the detection and characterization of cracks through wave propagation analysis.
- The study highlights the potential of vibration-based methods for structural health monitoring.
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