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Honeycomb interlayer structure is introduced into the underwater noise control.Based on the sound wave transferring theory of infinite layered elastic or viscoelastic medium,the sound insulation property of a normal incidence plane wave on underwater honeycomb interlayer structure is studied by using the method of the transfer matrix and percentage distribution of sound energy in different areas.As a particular kind of complex multilayered rubber compound structures,honeycomb sandwich rubber compound structure has better sound insulation property than rubber interlayer with cylindrical cavities compound structure.Simulation results show that the property of rubber material has great effect on structural sound insulation.Soft and small Poisson’s ratio rubber can obviously improve sound insulation performance of the whole structure.Furthermore,the material property of the face layer of the honeycomb interlayer structure has greater effects on the insulation performance.To validate the theoretical analysis,large samples of freedom-field measurement of honeycomb sandwich compound structure is carried out in the anechoic water tank of our university.The measurement result is in good agreement with the theoretical prediction.
Based on the sound wave transferring theory of infinite layered elastic or viscoelastic medium, the sound insulation property of a normal incidence plane wave on underwater honeycomb interlayer structure is studied by using the method of the transfer matrix and percentage distribution of sound energy in different areas. As a particular kind of complex multilayered rubber compound structures, honeycomb sandwich rubber compound structure has better sound insulation property than rubber interlayer with cylindrical cavities compound structure. Simulation results show that the property of rubber material has great effect on structural sound insulation. Soft and small Poisson’s ratio rubber canarently improve sound insulation performance of the whole structure. Morerther, the material property of the face layer of the honeycomb interlayer structure has greater effects on the insulation performance. To validate the th eoretical analysis, large samples of freedom-field measurement of honeycomb sandwich compound structure is carried out in the anechoic water tank of our university. The measurement result is in good agreement with the theoretical prediction.