Dynamic-Stiffness Support Structure for Sensory Acoustic Vibration
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Solution Overview
Problem
Vibration devices for sensory acoustic apparatus face a trade-off between achieving sufficient vibration intensity and load carrying capacity, with high rigidity improving load carrying but limiting vibration amplitude, and mutual interference between multiple devices degrading sensory acoustic quality.
Innovation Solution
A structure with a supporting part that has dynamic stiffness to amplify or attenuate specific vibration frequencies, allowing for increased vibration intensity while maintaining load carrying capacity, and isolating vibration modes to prevent interference between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the supporting part has high rigidity to improve load carrying capacity, then the load carrying capacity is improved, but the vibration amplitude is limited and vibration intensity cannot be increased
Solution Approach 1:
The supporting part is designed with dynamic stiffness characteristics that vary with frequency. It has high static stiffness to support the weight load, but exhibits high dynamic stiffness at specific vibration frequencies to amplify vibration amplitude. This is achieved by designing the supporting part's structural parameters (such as thickness, material distribution, or geometric configuration) to create resonant frequencies that coincide with desired vibration frequencies, allowing the supporting part to act as a vibration amplifier at those frequencies while maintaining load-bearing capability.
2Productivity
If multiple vibration devices are used to enhance sensory acoustic, then the sensory acoustic quality is improved, but mutual interference between devices degrades quality
Solution Approach 1:
Each vibration device is equipped with its own supporting part having specific dynamic stiffness characteristics tailored to that device's operating frequency. The supporting parts of different devices are designed with different dynamic stiffness parameters so that each device operates at its own resonant frequency without interfering with others. This localized optimization of dynamic characteristics allows multiple devices to coexist and function simultaneously without mutual interference.
Solution Approach 2:
The supporting part is designed to exhibit high dynamic stiffness at a specific resonant frequency, allowing the vibration device to operate efficiently at that frequency. By tuning each device's supporting part to different resonant frequencies, the system enables multiple vibration devices to operate simultaneously without interference, as each device's vibration is amplified only at its designated frequency by its corresponding supporting part.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively amplifies or attenuates desired vibration frequencies, enhancing sensory acoustic experience by improving vibration intensity and reducing interference between multiple devices.
Implementation Method 1
The supporting part is configured to have a dynamic stiffness that amplifies or attenuates transmission of a vibration of at least a predetermined frequency in a vibration generated in at least one direction by the vibration part
Implementation Method 2
The vibration device is driven by an electromagnet that converts an electric signal into a mechanical vibration
Data Source
AI summary
A structure 100 according to an embodiment of the present disclosure includes: a vibration part 110 configured to hold a vibrating member; a housing 120 configured to at least partially house the vibration part 110; and supporting parts 130SR, 130SL configured to support the vibration part 110 by coupling the vibration part 110 and the housing 120, wherein the supporting parts 130SR, 130SL are each configured to have a dynamic stiffness that amplifies or attenuates transmission of a vibration of at least a predetermined frequency in vibrations generated in at least one direction by the vibration part 110 in a state of holding the vibrating member, and a static stiffness required for supporting the vibration part 110 in the state of holding the vibrating member. A system including the structure 100 and the vibrating member has characteristics in which a vibration transmittance gradually decreases, as a vibration frequency of the vibration in the at least one direction increases, after exhibiting an excited vibration mode in which the vibration transmittance is increased. The supporting parts 130SR, 130SL have the dynamic stiffness that exhibits the excited vibration mode such that the vibration transmittance at the predetermined frequency is greater or smaller than 1.