泵喷分布式脉动压力激励下泵喷艇体耦合系统振动声辐射

黄修长,苏智伟,师帅康,饶志强,华宏星

振动与冲击 ›› 2021, Vol. 40 ›› Issue (18) : 1-9.

PDF(2546 KB)
PDF(2546 KB)
振动与冲击 ›› 2021, Vol. 40 ›› Issue (18) : 1-9.
论文

泵喷分布式脉动压力激励下泵喷艇体耦合系统振动声辐射

  • 黄修长1,2,苏智伟1,2,师帅康1,2,饶志强1,2,华宏星1,2
作者信息 +

Vibro-acoustic responses of a coupled pump-jet suboff system under distributed unsteady hydrodynamics by a pump-jet

  • HUANG Xiuchang1,2,SU Zhiwei1,2,SHI Shuaikang1,2,RAO Zhiqiang1,2,HUA Hongxing1,2
Author information +
文章历史 +

摘要

针对suboff艇后泵喷推进器分布式脉动压力激励下的泵喷-轴系-艇体耦合系统振动声辐射响应计算和特性分析开展研究。建立计算流体动力学(computational fluid dynamics,CFD)模型利用剪切应力输运(shear stress transfer,SST)k-ω模型进行suboff艇后泵喷推进器表面脉动压力的计算,利用耦合有限元法(finite element method,FEM)建立泵喷-轴系-艇体耦合系统动力学模型,结合自编径向基函数插值程序获得表面脉动压力在泵喷结构湿表面的空间分布,利用边界元法(boundary element method,BEM)计算泵喷-轴系-艇体耦合系统的声辐射特性。对泵喷-轴系-艇体的耦合模态特性、传递力、辐射声功率和指向性等开展分析。结果表明:声辐射以转子表面脉动压力的贡献为主;二阶轴频以上,纵向脉动压力的贡献占优;泵喷激励下,振动声辐射主要特征频率包括激励力特征线谱、艇体的纵振模态、转子同相振动模态(呼吸模态)、转子-轴系一阶纵振模态等;导管和定子脉动压力激励下振动声辐射响应峰值出现在叶频(blade passing frequency,BPF)和2倍叶频处,量级和转子表面脉动压力激励处于同一量级,但其和转子表面脉动压力共同作用时,由于相位相互抵消,响应幅值并没有显著增大。研究结果可为泵喷-轴系-艇体耦合系统振动声辐射的控制提供指导。

Abstract

The paper is aimed at studying vibro-acoustic responses of a coupled pump-jet-shafting-suboff system under unsteady hydrodynamic excitations from the pump-jet running in the wake of the suboff model.The excitations of the pump-jet in the rear of the a suboff model were analysed by the computational fluid dynamics (CFD) with a shear stress transfer(SST) k-ω model and the vibro-acoustic responses were predicted by the coupled finite element method(FEM).A mapping method based on radial basis function was established between CFD/structural meshes to obtain the distributed pulsation force on the structural wet surface.The radiated sound was studied by the boundary element method(BEM).Modal shapes, transmitted forces, sound radiation power and radiation directivity pattern were reported to illustrate the characteristics of vibro-acoustic responses.It is shown that the contribution of the rotor is dominant; among three directions components, the longitudinal distributed forces contribute most to responses over the second harmonics of shaft frequency; the responses exhibit peaks at multiple blade passing frequencies and characteristic structural modes, which include the longitudinal mode of hull, the in-phase mode(breathing mode) of propeller as well as the longitudinal mode of propeller-shaft; the vibro-acoustic responses under the distributed pressure on the stator and duct will produce peaks at blade passing frequency(BPF) and 2BPF, which are of the same level as those produced by the distributed pressure on the rotor, however, the magnitude of the vibro-acoustic response will not increase if they are applied simultaneously due to the phase difference and cancellation between them.The conclusions will shed some light on the design and controlling of vibro-acoustic responses of the coupled pump-jet-shafting-suboff-system.

关键词

泵喷 / 分布式脉动压力 / 泵喷-轴系-艇体耦合系统 / 模态 / 振动声辐射

Key words

pump-jet / distributed unsteady hydrodynamics / coupled pump-jet-shafting-suboff system / structural mode / vibro-acoustic response

引用本文

导出引用
黄修长,苏智伟,师帅康,饶志强,华宏星. 泵喷分布式脉动压力激励下泵喷艇体耦合系统振动声辐射[J]. 振动与冲击, 2021, 40(18): 1-9
HUANG Xiuchang,SU Zhiwei,SHI Shuaikang,RAO Zhiqiang,HUA Hongxing. Vibro-acoustic responses of a coupled pump-jet suboff system under distributed unsteady hydrodynamics by a pump-jet[J]. Journal of Vibration and Shock, 2021, 40(18): 1-9

参考文献

[1]MERZ S, KESSISSOGLOU N, KINNS R, et al.Passive and active control of the radiated sound power from a submarine excited by propeller forces[J].Journal of Ship Research, 2013,57(1): 59-71.
[2]ZHANG G B, ZHAO Y, LI T Y, et al.Propeller excitation of longitudinal vibration characteristics of marine propulsion shafting system[J].Shock and Vibration, 2014(2): 413592.
[3]谢基榕,沈顺根,吴有生.推进器激励的艇体辐射噪声及控制技术研究现状[J].中国造船, 2010,51(4): 234-241.
XIE Jirong, SHEN Shungen, WU Yousheng.Research status on noise radiation from vibrating hull induced by propeller and reduction measures[J].Shipbuilding of China, 2010,51(4): 234-241.
[4]WEI Y S, WANG Y S.Unsteady hydrodynamics of blade forces and acoustic responses of a model scaled submarine excited by propeller’s thrust and side-forces[J].Journal of Sound and Vibration, 2013,332(8): 2038-2056.
[5]HUANG X C, NI Z, ZHANG Z G, et al.Stiffness optimization of marine propulsion shafting system by FRF-based substructuring method and sensitivity analysis[J].Ocean Engineering, 2017,144: 243-256.
[6]CHEN Y, WANG L, HUA H X.Longitudinal vibration of marine propeller-shafting system induced by inflow turbulence[J].Journal of Fluids and Structures, 2017,68: 264-278.
[7]ZOU D L, ZHANG J B, TA N, et al.Study on the axial exciting force characteristics of marine propellers considered the effect of the shaft and blade elasticity[J].Applied Ocean Research, 2019, 89: 141-153.
[8]LI J S, QU Y G, HUA H X.Hydroelastic analysis of underwater rotating elastic marine propellers by using a coupled BEM-FEM algorithm[J].Ocean Engineering, 2017,146: 178-191.
[9]饶志强.泵喷推进器水动力性能数值模拟[D].上海:上海交通大学, 2012.
[10]LI H, HUANG Q G, PAN G, et al.The transient prediction of a pre-swirl stator pump-jet propulsor and a comparative study of hybrid RANS/LES simulations on the wake vortices[J].Ocean Engineering, 2020,203: 107224.
[11]HUANG Q G, LI H, PAN G, et al.Effects of duct parameter on pump-jet propulsor unsteady hydrodynamic performance[J].Ocean Engineering, 2021,221: 108509.
[12]YU H T, DUAN N Y, HUA H X, et al.Propulsion performance and unsteady forces of a pump-jet propulsor with different pre-swirl stator parameters[J].Applied Ocean Research, 2020,100: 102184.
[13]SUN Y, LIU W, LI T Y.Numerical investigation on noise reduction mechanism of serrated trailing edge installed on a pump-jet duct[J].Ocean Engineering, 2019,191: 106489.
[14]WILCOX D C.Turbulence modeling for CFD[M].3rd ed.California: DCW Industries, 2006.
[15]BAI M R, IH J G, BENESTY J.Acoustic array systems: theory, implementation, and application[M].New York: John Wiley & Sons., 2013.
[16]LIU H, HUANG T T.Summary of DARPA suboff experimental program data[R].Carderock: Naval Surface Warfare Center, 1998.
[17]MECHEL F P.Formulas of acoustics[M].Berlin: Springer-Verlag, 2008.

PDF(2546 KB)

Accesses

Citation

Detail

段落导航
相关文章

/