반동 전단 구조 인텐서티 측정에 의한 제진재 적용과 그에 따른 에어컨 실외기 구조 방사 소음 저감

Placing Constrained Layer Damping Patches Using Reactive Shearing Structural Intensity in Order to Reduce the Radiated Sound Power of a Air-Conditioner Outdoor Unit

The use of reactive shearing structural intensity to place small patches of constrained layer damping material in order to achieve the largest reduction in the radiated sound power of Air-conditioner outdoor unit is described. The normal surface velocity of each panel was measured using a laser doppler vibrometer. Experimental results indicated that patches of constrained layer damping material placed over areas of high reactive structural intensity reduced the radiated sound power significantly more than patches of the same area placed over areas of low reactive structural intensity