DYNAMIC VIBRATION ABSORBER SYSTEN FOR LOW FREQUENCY SOUND INSULATION

文件类型：PDF文档
文件大小：302K
PURPOSE : A dynamic vibration absorber system for attenuating low-frequency sound is provided to reduce a low-frequency noise which is generated by noise sources inside a ship. CONSTITUTION : A dynamic vibration absorber system(10) for low-frequency sound comprises a plurality of dynamic vibration absorbers which is combined with a bulkhead(20) of a ship. A plurality of dynamic vibration absorbers is arranged in at least one of a steel plate(110) and a mass unit(120) to have a different weight with consideration of each frequency band of the noise.