| 摘要 |
PROBLEM TO BE SOLVED: To reduce acoustic energy of sound (noise) that is a control target by specifying a physical structure of a resonance mechanism modeled by an equivalent parameter of one freedom degree system and disposing the resonance mechanism of the specified physical structure in an acoustic field of the actual control target to reduce an amplitude value of natural vibration of the control target. SOLUTION: A design device sets a position wherein the resonance mechanism is disposed in a modeled acoustic field. The design device models the resonance mechanism by equivalent mass, an equivalent spring constant, and a coefficient representing a loss, and disposes the modeled resonance mechanism in the modeled acoustic field. The design device displays a frequency characteristic of the modeled acoustic field, specifies the structure of the resonance mechanism disposed in the modeled acoustic field from the equivalent mass, the equivalent spring constant, and the coefficient representing the loss of the resonance structure when displaying the desired frequency characteristic of a designer, and disposes the resonance structure of the specified structure in the acoustic field. COPYRIGHT: (C)2011,JPO&INPIT
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