螺旋桨脉动压力作用下自航船舶艉部振动数值研究

doi:10.16183/j.cnki.jsjtu.2021.175

摘要/Abstract

摘要：

为研究静水中航行的船舶在螺旋桨脉动压力作用下的艉部振动特性,基于雷诺平均(RANS)方法,结合剪切应力输运(SST) k-ω湍流模型进行船桨自航数值模拟.将得到的船体表面脉动压力作为外激励,并通过结构有限元模型耦合流场边界元模型进行声固耦合计算,建立了螺旋桨表面力激励自航船舶艉部振动数值预报方法.通过分析螺旋桨表面力在时域与频域内的变化规律,发现叶频分量的幅值远大于其他频率分量的幅值.对于右旋桨,螺旋桨上方的右舷侧压力幅值高于左舷侧压力幅值.通过研究螺旋桨表面力、结构固有特性与振动响应结果之间的对应关系,发现船艉结构耦合模态固有频率应当远离螺旋桨激励力频率,以降低振动响应.通过探究相同激励作用下船艉结构变化对振动响应的影响,发现增加板厚或者安装加强筋可以改变结构固有特性,从而避开共振,达到减振效果.

关键词: 螺旋桨脉动压力, 艉部振动, 数值方法, 船舶自航, 减振

Abstract:

To study the stern vibration characteristics of the ship sailing in still water under the action of propeller induced pressure fluctuation, the propeller self-propulsion numerical simulation was conducted based on the Reynolds-averaged Navier-Stokes (RANS) method, in combination with the shear-stress transport (SST) k-ω model. Taking the obtained fluctuating pressure on the hull surface as the external excitation, the acoustic-structure coupling calculation was performed through the structural finite element model coupled with the flow field boundary element model, and a numerical prediction method for the stern vibration of the self-propulsion ship excited by the propeller surface force was established. By analyzing the fluctuating pressure characteristics in the time domain and frequency domain, it is found that the amplitude of the blade frequency component is much larger than that of other frequency components. For the right-handed propeller, the starboard side pressure amplitude above the propeller is higher than that on the port side. The analysis of the corresponding relationship between the propeller fluctuating pressure, the structural inherent characteristics, and the vibration response shows that the coupled mode natural frequency should be far away from the propeller excitation force frequency to reduce the vibration response. The exploration of the effect of modifying stern structure on the vibration response at the same excitation indicates that increasing the plate thickness or installing stiffeners can change the inherent characteristics of the structure, thus avoiding resonance and achieving the vibration reduction effect.

Key words: propeller induced pressure fluctuation, stern vibration, numerical methods, ship self-propulsion, vibration reduction

中图分类号:

U661.44

秦广菲, 姚慧岚, 张怀新. 螺旋桨脉动压力作用下自航船舶艉部振动数值研究[J]. 上海交通大学学报, 2022, 56(9): 1148-1158.

QIN Guangfei, YAO Huilan, ZHANG Huaixin. Numerical Study of Stern Vibration of a Self-Propulsion Ship in Propeller Induced Pressure Fluctuation[J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1148-1158.

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参考文献 17

[1]	中国船级社. 船上振动控制指南[S]. 北京: 人民交通出版社, 2012.
	China Classification Society. Guidelines for shipboard vibration contral[S]. Beijing: China Communications Press, 2012.
[2]	刘西安. 船舶尾部振动计算研究[D]. 武汉: 中国舰船研研究设计中心, 2018.
	LIU Xian. The research for vibration of the stern structure[D]. Wuhan: China Ship Development and Design Center, 2018.
[3]	陈翔, 夏利娟, 丁金鸿, 等. 散货船的总振动模态计算和动力响应预报[J]. 舰船科学技术, 2013, 35(3): 115-120.
	CHEN Xiang, XIA Lijuan, DING Jinhong, et al. The global vibration and dynamic response evaluation of a bulk carrier[J]. Ship Science and Technology, 2013, 35(3): 115-120.
[4]	周清华, 李祥宁, 胡要武. 滑行艇尾部结构的模态分析和响应预报[J]. 舰船科学技术, 2011, 33(7): 36-39.
	ZHOU Qinghua, LI Xiangning, HU Yaowu. Vibration mode analysis and response prediction of stern structure for planing boat[J]. Ship Science and Technology, 2011, 33(7): 36-39.
[5]	许树浩, 黄茜, 梁川. 全船总振动数值计算研究[C]// 第十五届船舶水下噪声学术讨论会论文集. 郑州: 中国船舶科学研究中心, 2015: 390-398.
	XU Shuhao, HUANG Qian, LIANG Chuan. Research on numerical calculation of ship’s total vibration[C]// Proceedings of the 15th Symposium on Ship Underwater Noise. Zhengzhou, China: China Ship Scientific Research Center, 2015: 390-398.
[6]	朱理, 庞福振, 康逢辉. 螺旋桨激励力下的舰船振动特性分析[J]. 中国造船, 2011, 52(2): 8-15.
	ZHU Li, PANG Fuzhen, KANG Fenghui. Vibration characteristic of a warship subjected to propeller excitation[J]. Shipbuilding of China, 2011, 52(2): 8-15.
[7]	陈如星, 周瑞平, 林晞晨. 基于CFX的螺旋桨激振力数值预报研究[J]. 武汉理工大学学报, 2014, 36(7): 73-79.
	CHEN Ruxing, ZHOU Ruiping, LIN Xichen. Numerical simulation of the propeller-induced force based on CFX[J]. Journal of Wuhan University of Technology, 2014, 36(7): 73-79.
[8]	YAO H L, ZHANG H X. Numerical studies of propeller exciting bearing forces under nonuniform ship’s nominal wake and the influence of cross flows[J]. Shock and Vibration, 2017, 2017: 4319260.
[9]	李亮, 王超, 孙帅, 等. 实船自航试验数值模拟及尺度效应分析[J]. 哈尔滨工程大学学报, 2016, 37(7): 901-907.
	LI Liang, WANG Chao, SUN Shuai, et al. Numerical simulation and scale effect of self-propulsion test of a full-scale ship[J]. Journal of Harbin Engineering University, 2016, 37(7): 901-907.
[10]	JASAK H, VUKČEVIĆ V, GATIN I, et al. CFD validation and grid sensitivity studies of full scale ship self propulsion[J]. International Journal of Naval Architecture and Ocean Engineering, 2019, 11(1): 33-43. doi: 10.1016/j.ijnaoe.2017.12.004 URL
[11]	余嘉威, 周宇杰, 何涛, 等. 实尺度KCS自航性能URANS仿真[C]// 第三十一届全国水动力学研讨会论文集. 厦门: 海洋出版社, 2020: 997-1006.
	YU Jiawei, ZHOU Yujie, HE Tao, et al. Unsteady viscous CFD simulations of full-scale kcs self-propulsion[C]// Proceedings of the 31st National Hydrodynamics Symposium. Xiamen, China: China Ocean Press, 2020: 997-1006.
[12]	沈志荣. 船桨舵相互作用的重叠网格技术数值方法研究[D]. 上海: 上海交通大学, 2014.
	SHEN Zhirong. Development of overset grid technique for hull-propeller-rudder interactions[D]. Shanghai: Shanghai Jiao Tong University, 2014.
[13]	MENTER F R. Two-equation eddy-viscosity turbulence models for engineering applications[J]. AIAA Journal, 1994, 32(8): 1598-1605. doi: 10.2514/3.12149 URL
[14]	刘城, 洪明, 刘晓冰. 有限元/间接边界元法求解浸水板振动特性[J]. 哈尔滨工程大学学报, 2014, 35(4): 395-400.
	LIU Cheng, HONG Ming, LIU Xiaobing. The solution for vibration characteristics of submerged plates by applying FEM/IBEM[J]. Journal of Harbin Engineering University, 2014, 35(4): 395-400.
[15]	李清, 杨德庆, 郁扬. 舰船低频水下辐射噪声的声固耦合数值计算方法[J]. 振动与冲击, 2018, 37(3): 174-179.
	LI Qing, YANG Deqing, YU Yang. Numerical methods for ship underwater sound radiation in low frequency domain with vibro-acoustic coupling[J]. Journal of Vibration and Shock, 2018, 37(3): 174-179.
[16]	HINO T, SATO Y. Ship flow computation by unstructured NS solver SURF[C]// Proceedings of CFD Workshop. Tokyo, Japan: International Steering Committee, 2005: 641-645.
[17]	李清, 杨德庆, 郁扬. 舰船低频水下辐射噪声数值计算方法对比研究[J]. 中国造船, 2017, 58(3): 114-127.
	LI Qing, YANG Deqing, YU Yang. Comparative study on numerical methods for underwater low-frequency radiation noise of ship[J]. Shipbuilding of China, 2017, 58(3): 114-127.

KCS参数	取值	KP505参数	取值
航速/(m·s^-1)	2.1964	直径/mm	250
船长/m	7.2786	毂径比	0.180
船宽/m	1.0190	桨叶数	5
型深/m	0.6013	盘面比	0.800
吃水/m	0.3418	平均螺距比	0.950
雷诺数	1.4×10⁷	旋向	右旋
弗劳德数	0.26	叶切面形状	NACA66

参数	数值结果	实验数据	偏差/%
C_T	3.997	3.966	0.78
K_T	0.163	0.170	-4.12
10K_Q	0.297	0.288	3.12

阶数	干模态固有频率/Hz	耦合模态固有频率/Hz
1	58.1	46.8
2	62.9	58.3
3	69.5	62.9
4	70.8	63.1
5	86.3	69.6
6	92.8	70.5
7	95.5	74.3
8	98.7	86.3
9	112.2	92.6
10	133.8	95.5

阶数	模型I		模型II			模型III			模型IV			模型V			模型VI
	d/mm	加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋
	4.0	无	4.5		无	5.0		无	5.5		无	4.0		有	5.5		有
1	46.8			51.0			54.9			58.6			53.1			63.0
2	58.2			65.5			72.8			80.0			63.6			86.3
3	62.9			70.6			78.3			86.1			71.8			92.6
4	63.1			71.5			79.9			88.5			73.8			98.5
5	69.6			78.3			87.0			95.5			83.0			104.7
6	70.5			79.1			87.5			95.7			86.8			110.6
7	74.3			82.3			90.3			98.5			89.7			112.9
8	86.3			97.0			107.6			118.3			95.4			130.2
9	92.6			104.0			115.3			126.4			100.8			137.9
10	95.5			107.4			119.3			131.2			110.7			144.7

频率	模型I		模型II			模型III			模型IV			模型V			模型VI
	d/mm	加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋	d/mm		加强筋
	4.0	无	4.5		无	5.0		无	5.5		无	4.0		有	5.5		有
f_BPF	-1.5			7.4			15.6			23.4			11.8			32.6
f_2BPF	0.5			2.1			4.9			0.5			0.4			3.7