METHOD AND APPARATUS FOR REDUCING STRUCTURAL VIBRATION AND NOISE

PROBLEM TO BE SOLVED: To provide novel methods and apparatus for damping vibration of, and acoustic transmission through, an aircraft or vehicle structure.SOLUTION: A conjugate damper for a structural panel includes a constraining sheet extending between a first edge and a second edge. Each of the f...

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Bibliographische Detailangaben
Hauptverfasser:	CLIFF L CHIN, JOSHUA M MONTGOMERY
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR AEROPLANES AIRCRAFT AVIATION BLASTING COSMONAUTICS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HELICOPTERS LIGHTING MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SHOCK-ABSORBERS SOUND-PRODUCING DEVICES SPRINGS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide novel methods and apparatus for damping vibration of, and acoustic transmission through, an aircraft or vehicle structure.SOLUTION: A conjugate damper for a structural panel includes a constraining sheet extending between a first edge and a second edge. Each of the first edge and the second edge is at least partially coupled to a first surface of the structural panel. The conjugate damper also includes a damping layer coupled between the constraining sheet and the first surface such that, when the structural panel is in a compressively deformed state, a thickness of the damping layer in a direction generally normal to the first surface is decreased relative to a baseline state. The damping layer includes a viscoelastic material. 【課題】航空機または車両構造体の振動、および航空機または車両構造体を通る音響伝達を減衰するための新規な方法および装置を提供する。【解決手段】構造パネルのための複合ダンパは、第1の縁部と第2の縁部との間に延伸する拘束シートを含む。第1の縁部および第2の縁部のそれぞれが、少なくとも部分的に構造パネルの第1の面に結合されている。複合ダンパは、更に、拘束シートと第1の面との間に結合された減衰層を含み、構造パネルが圧縮して変形された状態である場合、第1の面に略垂直な方向に減衰層の厚さが、基準線状態に対して減少する。減衰層が粘弾性材料を含む。【選択図】図２