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

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