The invention relates to a noise forecasting method for a ship living cabin, in particular to an improved noise forecasting method for the ship living cabin based on an SPR (Surface Plasmon Resonance) method and considering the influence of a heating ventilation air-conditioning system. Determining an air noise source level and a secondary radiation noise source level of the heating ventilation air conditioner fan by utilizing an experimental test or adopting an empirical formula method; according to the heating ventilation air-conditioning system layout diagram, determining a noise source transmission path transmitted into a receiving cabin (namely a target cabin), and calculating transmission path loss of the noise source transmission path; calculating a radiation sound power level of fan/flow noise/pipeline leakage noise transmitted into the target cabin; calculating by adopting an energy superposition method to obtain a total radiation sound power level transmitted into the target cabin; calculating a room constant R of the target cabin; and calculating and considering a target cabin radiation sound pressure level caused by the heating ventilation air conditioning system according to an reverberant sound field formula. The improved method can effectively improve the solving efficiency and the forecasting precision, and provides effective analysis means and basis for ship living cabin noise forecasting.
本发明涉及一种船舶住舱舱室噪声预报方法,基于SPR法考虑暖通空调系统影响的改进船舶住舱舱室噪声预报方法。利用实验测试或采用经验公式法确定暖通空调风机的空气噪声源级以及二次辐射噪声源级;根据暖通空调系统布置图,确定传入接收舱室(即目标舱室)的噪声源传递路径并计算其传递路径损耗;计算传入目标舱室的风机/流噪声/管道泄漏噪音的辐射声功率级;采用能量叠加法计算得到传入目标舱室的总辐射声功率级;计算目标舱室的房间常数R;根据混响声场公式计算考虑暖通空调系统引起的目标舱室辐射声压级。此改进的方法可有效提高求解效率及预报精度,为船舶住舱舱室噪声预报提供有效分析手段和依据。
Noise forecasting method for living room of ship
一种船舶住舱舱室噪声预报方法
2023-02-03
Patent
Electronic Resource
Chinese
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