在修正Timoshenko梁基础上，采用传递矩阵法推导了水下结构推进轴系简化模型的传递矩阵，实现各轴承位置处振动功率流的求解。以各轴承位置处传递功率流作为优化目标，选择三组不同的优化方案，取艉轴前后轴承刚度、推力轴承刚度以及轴承间距为优化变量对推进轴系参数进行优化。利用三维水弹性力学理论和三维水弹性声学分析软件，计算分析不同优化结果下水下结构的声源级曲线。结果表明：以艉轴后轴承、艉轴前轴承和推力轴承各处传递功率流最小为优化目标的优化方案最有利于减小水下结构的声辐射。
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.
关键词
推进轴系 /
传递矩阵法 /
功率流 /
参数优化 /
声源级
{{custom_keyword}} /
Key words
propulsion shafting /
transfer matrix method /
power flow /
parameters optimization /
sound source level
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[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.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1554 KB)
