Insertion loss prediction of floating floors used in ship cabins

Yat İçmekani İçi̇n Gürültü Ve Ti̇treşi̇m Sönümlemesi̇

“…Zhou and Croker [17], Cha and Chun [18] and Song et al [19] studied performance of acoustic insulation components to determine the loss on values of sound transmission. According to Anon [20] designers generally decide to use absorption (fibrous or cellular such as mineral wool, fiberglass, ceramic, melamine, polyamide and urethane), barrier (existing structures such as walls, cabinets, enclosures and etc.…”

“…Zhou and Croker [17], Cha and Chun [18] and Song et al [19] studied performance of acoustic insulation components to determine the loss on values of sound transmission. According to Anon [20] [10] passive mountings are the one of the approaches to cut off conduction of vibration occurs from machineries.…”

Numerical analysis and optimization of noises of ship cabins in the low frequency

“…Song [7] numerically computed the floating floor structure with viscoelastic damping layer, predicted its structural noise, studied the impact of rock wool's thickness, density and laying direction on the structural noise of floating floor inserting into the viscoelastic damping layer, and established a real model for test and verification. Chai [8] studied the impact of floating floor on the vibration reduction performance of ship cabin, proposed two theoretical models including mass-spring model and volatility model to compute the insertion loss of floating floor, and verified the proposed models through experiments. Xu [9] established ship FEM/BEM model of power system with raft structure and computed the vibration and sound pressure response of ship shell plate based on the coupling effect between ship and fluid mediums, but the researched process lacked the support of corresponding experimental data.…”

Vibration Source Contribution Evaluation of a Thin Shell Structure Based on ICA

“…In the past decades, much research work is devoted to vibration transmission characteristic analysis of different structures, such as beams (Lee et al, 2007), girders (Senjanovic et al, 2009), rafts (Niu et al, 2005), casings (Otrin et al, 2005), panels (Lee et al, 2009), plates (Xie et al, 2007;Bonfiglio et al, 2007) and shells (Efimtsov & Lazarev, 2009). Some studies dedicated to the responses of whole ship hull, such as free vibration analysis of thin shell (Lee, 2006), insertion loss prediction of floating floors (Cha & Chun, 2008) and structural responses of ship hull (Iijima et al, 2008). Another method based on the active control over vibration and noise is also deeply studied in recent years, such as controlling high frequencies of vibration signals by structure modification (Tian et al, 2009), active vibration control using delayed position feedback method (Jnifene, 2007), high frequency spatial vibration control for complex structures (Barrault et al, 2008), and active vibration isolation of floating raft system (Niu, et al, 2005).…”