左营营, 杨德庆, 肖健. 邮轮舱室瞬态噪声的时域与频域数值计算方法[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.04003
引用本文: 左营营, 杨德庆, 肖健. 邮轮舱室瞬态噪声的时域与频域数值计算方法[J]. 中国舰船研究. DOI: 10.19693/j.issn.1673-3185.04003
Time domain and frequency domain numerical calculation methods for transient noise of cruise ship cabins[J]. Chinese Journal of Ship Research. DOI: 10.19693/j.issn.1673-3185.04003
Citation: Time domain and frequency domain numerical calculation methods for transient noise of cruise ship cabins[J]. Chinese Journal of Ship Research. DOI: 10.19693/j.issn.1673-3185.04003

邮轮舱室瞬态噪声的时域与频域数值计算方法

Time domain and frequency domain numerical calculation methods for transient noise of cruise ship cabins

  • 摘要: 【目的】本文旨在探索瞬态激励下舱室瞬态噪声的高效精确数值计算方法。【方法】以某邮轮居住舱室为对象,分别建立声振耦合模式下时域及频域舱室瞬态噪声数值模型,通过对比瞬态声激励下及瞬态声与力激励联合作用下舱室瞬态噪声数值计算结果,探讨两种计算方法在计算精度、计算效率、求解规模和建模难度等方面的差异。鉴于瞬态激励谱的频率范围较宽,给出多源激励下船舶舱室瞬态噪声的全频段数值计算方法,并开展了实船测试。【结果】研究结果表明,舱室瞬态噪声试验结果与数值结果的总级误差在3 dB以内,验证了本文数值方法的有效性。本文所给时域法和频域法的计算精度相当,时域法的计算效率高于频域法,但建模难度要高于频域法。瞬态空气噪声源的影响范围比瞬态结构振动源的影响范围小。【结论】本文方法能对大型邮轮舱室瞬态响应进行较为精确的预报,可在船舶舱室设计阶段预测瞬态舱室噪声,降低设计成本。

     

    Abstract: Objectives The purpose of this paper is to explore an efficient and accurate numerical calculation method for cabin transient noise under transient excitation. Methods In this paper, the numerical models of cabin transient noise in time domain and frequency domain under acoustic-vibration coupling mode are established, respectively. By comparing the numerical calculation results of cabin transient noise under transient acoustic excitation and transient acoustic-force excitation, the differences between the two calculation methods in calculation accuracy, calculation efficiency, solution scale and modeling difficulty are discussed. Considering the broadband characteristics of transient excitation, a full-band numerical calculation method for transient noise of ship cabins under multi-source excitation is given, and a real ship test is carried out. The total level error of the cabin transient noise obtained by the test results and the recommended numerical method is within 3 dB, which verifies the effectiveness of the numerical method. Results The results show that the total level error between the cabin transient noise test results and the numerical results is within 3 dB, which verifies the effectiveness of the numerical method in this paper. The computational accuracy of the time-domain method and the frequency-domain method given in this paper are comparable, and

     

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