A5100710428- Acoustic Wave Phenomena Research
- Advanced Antenna and Metasurface Technologies
- Engineering Applied Research
- Noise Effects and Management
- Metamaterials and Metasurfaces Applications
- Vehicle Noise and Vibration Control
- Aerodynamics and Acoustics in Jet Flows
Southwest Jiaotong University
2024
Abstract Locally resonant acoustic metamaterials offer distinctive advantages in controlling low-frequency elastic waves. However, passive structures often face limitations due to narrow bandgaps and fixed working band once they are fabricated. This paper introduces a novel metamaterial beam with tunable bandgaps. achievement is made possible by employing one electromagnet three permanent magnets create an electromagnetic spring. The initial stiffness, provided the spiral beam, collaborates...
The acoustic performance of automotive micro-motors directly impacts the comfort and driving experience both drivers passengers. However, various motor production testing uncertainties can lead to noise fluctuations during operation. Thus, predicting operational range motors on line in advance becomes crucial for timely adjustments parameters process optimization. This paper introduces a prediction model based Multi-Branch Channel–Spatial Adaptive Weighting Strategy (MCSAWS). includes...
To reduce the low-frequency noise inside automobiles, a lightweight plate-type locally resonant acoustic metamaterial (LRAM) is proposed. The design method for bending wave bandgap of LRAM panel was derived. Prototype panels were fabricated and tested, effectiveness verified by measuring vibration transmission characteristics steel with installed LRAM. Based on method, influence geometric material parameters investigated. inner side tailgate traditional SUV, which effectively reduced (around...