Research on the Effects of Propulsion Shafting Parameters Optimization on Vibra-acoustic Radiation of Underwater Structure
LI Hai-feng1,2, HE Qi-wei1,2 , YU Xiang1,2, ZHU Shi-jiani1,2
1. College of Power Engineering, Naval Univ. of Engineering, Wuhan 430033, China；
2. National Key Laboratory on Ship Vibration & Noise, Wuhan 430033, China
Abstract：The expression of field transfer matrix of a ship propulsion shafting is deduced based on the modified Timoshenko beam theory using the transfer matrix method. And, the power flow of each bearing of the propulsion shafting is carried out numerically. The propulsion shafting parameters are optimized under three different optimization schemes by selecting the aft stern shaft bearing stiffness , front stern shaft bearing stiffness, thrust bearing stiffness and the bearing spacing length as the optimization design variables and selecting the sum of the power flow of each bearing of the propulsion shafting as the optimization objectives. The three-dimensional sono-elastical theory and acoustic analysis software are applied to analyze the sound source level curve of the underwater structure under the different optimization results. The analysis results show that the acoustic radiation of underwater structure is the smallest when the power flow of each bearing of the propulsion shafting is minimal.
李海峰1,2，何其伟1,2，俞翔1,2，朱石坚1,2. 推进轴系参数优化对水下结构声振特性影响研究[J]. 振动与冲击, 2017, 36(14): 98-103.
LI Hai-feng1,2, HE Qi-wei1,2,YU Xiang1,2, ZHU Shi-jiani1,2. Research on the Effects of Propulsion Shafting Parameters Optimization on Vibra-acoustic Radiation of Underwater Structure. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(14): 98-103.
[1] 施引，朱石坚，何琳. 船舶动力机械噪声及其控制[M]. 北京：国防工业出本社，1990.
SHI Yin, ZHU Shi-jian, HE Lin. The sound and control of the ship power epuipment [M]. Beijing: National Defense Industry Press, 1990.
[2] Feng G P, Zhang Z Y, Chen Y. Research on transmission paths of a coupled beam-cylindrical shell system by power flow analysis [J]. Journal of Mechanical Science and Technology，2009，23：2138-2148.
[3] 周春良.船舶轴系振动研究[D].哈尔滨：哈尔滨工程大学动力与能源学院，2006.
ZHOU Chun-liang. Vibration research on ship shafting system[D]. Harbin: Harbin Engineering University, 2006.
[4] 杨志荣，秦春云，饶柱石.船舶推进轴系纵振动力吸振器设计及参数影响规律研究[J].振动与冲击，2007,26(8):101-103.
YANG Zhi-rong, QIN Chun-yun, RAO Zhu-shi. Design and analysis of a dynamic absorber for reducing axial vibration of ship shafting [J]. Journal of Vibration and Shock, 2007,26(8):101-103.
[5] 曹贻鹏.推进轴系引起的艇体结构振动与辐射噪声控制研究[D].哈尔滨：哈尔滨工程大学动力与能源学院，2008.
CAO Yi-peng. Study on underwater structure vibration and radiated noise control caused by propeller exciting force [D].Harbin Engineering University, 2008.
[6] 李栋梁.轴系-艇体耦合系统振动声辐射分析与实验研究[D].上海：上海交通大学，2012.
LI Dong-liang. Analysis experiment on vibration and acoustic radiation of the shafting-hull coupled system [D]. ShangHai Jiaotong University, 2012.
[7] Merz S，Kinns R，Kessissoglou N. Structural and acoustic responses of a submarine hull due to propeller forces[J]. Journal of Sound and Vibration, 2009,325:266-286.
[8] Wei Y S，Wang Y S, Ding K. Submarine underwater structure-borne noise and flow noise due to propeller excitation[J]. Acoustics Australia,2012,40(2):122-127.
[9] Wu Y S. Hydroelasticity of floating bodies[D].London: Brunel University,1984.
[10] Zou M S, Wu Y S, Ye Y L. Three-dimensional hydroelasticity analysis of acoustic responses of ship structures[C]. 9th International Conference on Hydrodynamics, 2010, 10:844-851.
[11] 祁立波，邹明松.加肋圆柱体水下低频辐射声特性研究[J].船舶力学，2015,19(7): 874-883.
QI Li-bo, ZOU Ming-song. Research on acoustic radiation of stiffened cylinder in low-frequency [J}. Journal of Ship Mechanics, 2015,19(7): 874-883.
[12] 陈镕,万春风，薛松涛等.Timoshenko梁运动方程的修正及其影响[J].同济大学学报(自然科学版),2005,(336):711-715.
Chen Rong, WAN Chun-feng, XUE Song-tao. Modification of motion equation of Timoshenko beam and its effect[J].Journal of TongJi University(Natural Science),2005, (336):711-715.
