17875586. MULTIBAND FLEXURAL WAVE ABSORBERS simplified abstract (TOYOTA JIDOSHA KABUSHIKI KAISHA)
Contents
MULTIBAND FLEXURAL WAVE ABSORBERS
Organization Name
TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor(s)
Xiaopeng Li of Ann Arbor MI (US)
Taehwa Lee of Ann Arbor MI (US)
MULTIBAND FLEXURAL WAVE ABSORBERS - A simplified explanation of the abstract
This abstract first appeared for US patent application 17875586 titled 'MULTIBAND FLEXURAL WAVE ABSORBERS
Simplified Explanation
The patent application describes a flexural wave absorber that includes two L-shaped cantilever beams: one lossy acoustic black hole and one lossless acoustic black hole. These beams are placed on the surface of a mechanical structure and spaced apart from each other. Together, they are designed to absorb different frequencies of flexural waves within a frequency band of at least 2000 Hz.
- The L-shaped cantilever beam lossy acoustic black hole and the L-shaped cantilever beam lossless acoustic black hole are configured to asymmetrically absorb flexural waves.
- The lossy acoustic black hole and the lossless acoustic black hole can have projecting beams with power law profiles on their outer or inner surfaces.
Potential Applications:
- Noise reduction in mechanical structures
- Vibration damping in buildings, vehicles, and machinery
- Acoustic insulation in aerospace and marine industries
Problems Solved:
- Absorbing and attenuating flexural waves within a wide frequency band
- Reducing noise and vibrations in various applications
- Improving the performance and comfort of structures and equipment
Benefits:
- Efficient absorption of flexural waves at different frequencies
- Customizable design for specific frequency ranges
- Compact and lightweight solution for noise and vibration control
Original Abstract Submitted
A flexural wave absorber includes an L-shaped cantilever beam lossy acoustic black hole disposed on a surface of a mechanical structure and an L-shaped cantilever beam lossless acoustic black hole disposed on the surface and spaced apart from the L-shaped cantilever beam lossy acoustic black hole a predefined distance. The L-shaped cantilever beam lossy acoustic black hole and the L-shaped cantilever beam lossless acoustic black hole, in combination, are configured to asymmetrically absorb a plurality of different frequencies of flexural waves within at least a 2000 Hz frequency band acting on the mechanical structure. The L-shaped cantilever beam lossy acoustic black hole and the L-shaped cantilever beam lossless acoustic black hole can both include a projecting beam with an outer surface or an inner surface having power law profile.
