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Cabin noise analysis of polar transport vessels under ship-ice-water-air coupling continuous icebreaking based on the s-ale algorithm

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MARINE sTRUCTUREs 2024年 95卷

作者： shi, Yuanhe Yang, Deqing Li, Qing Qin, Jiangxuan Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn State Key Lab Ocean Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Collaborat Innovat Ctr Adv Ship Deep Sea Explorat Shanghai 200240 Peoples R China SJTU Yazhou Bay Inst Deepsea Sci & Technol Sanya 572024 Peoples R China China Classificat Soc Stand & Technol Ctr Shanghai 200135 Peoples R China

With the increasing number of ships navigating in polar regions, collisions between ships and sea ice are inevitable. The cabin noise problem caused by ship-ice collisions is significantly different from that of ships navigating in open water, and it seriously affects the comfort and safety of shipboard personnel. To explore the transient cabin noise response caused by ship-ice collisions, this paper performs numerical studies of the ice load, compares the ice resistance values of experimental and empirical formulas through the ship-ice-water-air coupled collision method, and gives the sound source load excitation. Then, in the frequency domain acoustic analysis, the acoustic response of the typical cabin noise under icebreaking excitation and coupling excitation is calculated by using the acoustic-structure coupling analysis model and statistical energy analysis model, respectively. The effect of ship transient cabin noise on personnel comfort is analyzed according to the standard of ship noise. The results show that the transient cabin noise is scattered from the collision position to the stern at a certain angle and decays along the length, width, and superstructure of the ship as the frequency increases. The transient cabin noise under coupled excitation shows an M-shape distribution in the ship ranges. The icebreaking excitation mainly affects the transient cabin noise within 1000 Hz, with strong nonlinearity at a lowfrequency band. The sound source excitation has a more obvious effect on the cabin noise in the middle-high frequency bands. The A-weighted sound pressure level of transient cabin noise in accommodation cabins and wheel houses during icebreaking operations of polar ships exceeds 5-20 dB(A) of the standard limit, which seriously affects the comfort of people on board. The research results of this paper can provide a reference for the study of ship-ice collision-induced transient cabin noise and the formulation of relevant standards.

关键词： Transient cabin noise Acoustic-structure coupling statistical energy analysis ship-ice collision ship-ice-water-air coupling s-ale algorithm

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Underwater radiated noise numerical analysis of polar transport vessels under ship-ice-water-air coupling continuous icebreaking based on the s-ale algorithm

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OCEAN ENGINEERING 2024年 309卷

作者： shi, Yuanhe Yang, Deqing Li, Qing Shanghai Jiao Tong Univ Sch Ocean & Civil Engn State Key Lab Ocean Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Collaborat Innovat Ctr Adv Ship Deep Sea Explorat Shanghai 200240 Peoples R China SJTU Yazhou Bay Inst Deepsea Sci & Technol Sanya 572024 Peoples R China

With the gradual opening of the Arctic channel, the underwater radiated noise induced by the ship-ice collision cannot be ignored. However, the underwater radiated noise induced by ship-ice collision is significantly different from that of ships navigating in open water. To explore the response rule of transient underwater radiation noise induced by ship-ice collision, this paper proposes a simplified numerical analysis method of ship-ice collisioninduced transient underwater radiated noise in the full frequency band by combining the explicit dynamic method and acoustic analysis method. The ship-ice-water-air coupled collision analysis method based on the sale algorithm is used to simulate and verify the ice load in the process of ship-ice continuous collision at different speeds. Then, the frequency-domain acoustic analysis method is used to predict the transient underwater radiated noise response in the full frequency band under icebreaking excitation and evaluate it by referring to the steady-state underwater radiated noise standard. The results show that the simplified analysis method can effectively predict the transient underwater radiation noise under icebreaking excitation. Under the icebreaking excitation, the radiation shape is irregularly scattered and the radiation direction is concentrated towards the bottom and bow of the ship with the frequency increase. The influence range of transient underwater radiated noise is mainly within 1000 Hz at different speeds, and the variation in the ship's speed affects the amplitude of the sound power level and the smoothness of the periodic response. The synthesized total sound power levels are 172.56 dB (V = 2.0kn), 174.15 dB (V = 2.5kn), 175.70 dB (V = 3.0kn), and 182.49 dB (V = 4.0kn), respectively. According to the comparison with the evaluation standard, it is found that the transient underwater radiation noise induced by ship icebreaking has a greater impact on marine organisms. It should give more detailed req

关键词： Transient underwater radiated noise Acoustic-structure coupling statistical energy analysis ship-ice collision ship-ice-water-air coupling s-ale algorithm

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Numerical analysis method of ship-ice collision-induced vibration of the polar transport vessel based on the full coupling of ship-ice-water-air

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Journal of Ocean Engineering and science 2023年第4期8卷 323-335页

作者： Yuan-He shi De-Qing Yang Wen-Wei Wu State Key Laboratory of Ocean Engineering School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration Shanghai Jiao Tong UniversityShanghai 200240China SJTU Yazhou Bay Institute of Deepsea Science and Technology Sanya 572024China National Key Laboratory on Ship Vibration&Noise China Ship Scientific Research CenterWuxi 214082China

As the Arctic Channel continues to be developed,collisions between polar navigation vessels and sea ice are inevitable,which will directly affect structural safety and vibration ***,the numerical analysis method of ship-ice collision-induced vibration is not perfect,and the effect of fluid coupling is not typically *** this paper,a simplified numerical analysis method for ship-ice collision-induced vibration is proposed,in which a reliable ice load is obtained by first performing ship-ice-water-air coupled collision calculations,followed by ship-ice-water coupled vibration calculations to obtain the vibration response of the *** addition,this paper investigates the full coupling method and the modeling ranges and meshing sizes involved in the analysis ship-ice collision-induced vibration,and the computational efficiencies of the traditional ale algorithm and s-ale algorithm are *** results indicate that the simplified simulation analysis method and gradient meshing model improve the calculation accuracy and efficiency in ship-ice collision and vibration response ***,the modeling range of the water and air models cannot be less than 6 times the ship width,2 times the ship length,and 1 times the ship depth,and the s-ale algorithm saves 47.86%time compared to the ale *** research results in this paper can provide a reference for the numerical simulation of ship-ice collision-induced vibration.

关键词： ship–ice collision Ice-induced vibration ship–ice–water–air coupling Fluid–structure interaction s-ale algorithm Gradient meshing model

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