1、ISSN 1000-0054CN 11-2223/N bv(1 S)J Tsinghua Univ ( Sci 时域; 系泊系统; 设计波法; 准静态方法; 集中质量法ms |: P 75DS M : AcI|: 1000-0054(2004) 09-1214-04Time domain approach for computing themooring force of a mooring systemsubject to wind, waves and currentsNIEMengxi , WANG Xusheng,WANG Xiaoming, ZHANG Lin( Department
2、 of Hydraulic and Hydropower Engineering,Tsinghua University, Beijing 100084, China)Abstract: The mooring force of a buoy mooring system subject towind, waves, and currents in oceanic engineering is a difficultengineering problem. A time domain approach was developed topredict the mooring force of a
3、 buoy mooring system subject tovarious fories. Nonlinear fifth-order Stokes and design-wavemethods were used to analyze the wave load, with empiricalformulas used for the current and wind loads. Initial conditions froma quasi-static method were used to begin the time history analysis ofthe vessel an
4、d mooring forces without considering the impact of thedynamic effects of the chain and the buoy on the vessel motion.Then, 2-D plumped mass method was used to model the chain andbuoy, with the dynamicequations solved by the Houbolt approach tocorrect the mooring force. The computational results comp
5、are wellwith experimental formulas, and the time domain approach can beused to accurately compute the mooring force on buoy mooringsystems.Key words: oceanic engineering; time domain; buoy mooringsystem; wave-design method; quasi-static method;lumped mass method “d /e、 TZLy/, S .“d s HZE J. ZYv, 199
6、7, 31( 11): 7 12.LIU Yingzhong, M IU Guoping. A time domain computationmethod for dynamic behavior of mooring system J. JShanghai Jiaotong Univ, 1997, 31( 11): 7 12. (in Chinese)6 Brown D T, Mavrakos S. Comparativestudy on mooring linedynamic loading J. Marine Structure, 1999, 12( 3): 131151.7 Ramza
7、n F A, Robison R W. An engineering assessment ofthe validity of the quasi-static approach to semisubmersiblemooring design A . Proc of the 18th Offshore Tech Conf C. Dallas, Texas: O TC, 1986. 419 425.( 1204:)5 结 论 5 T ? 3 ,4= 9 , s、. E Z TDe , V5. #E 9 1“ T。HTR-10l 5 ? 3 9 ,9 10% =。 ID (References)
8、1 b. HT R-10 ? 3 M s D.: bv, 2000.DUAN Bing. Instability Analysis of Two-Phase Flow inHTR-10 SG D . Beijing: Tsinghua University, 2000.(in Chinese)2 Xin R C, Awwad A, Dong Z F, et al. Heat transfer ofair/water two-phase flow in helical pipes J. J HeatTransf er, 1996, 118( 5): 442 448.3 V enkateswarl
9、u K, Sastry R C, Satyanarayan A. Heattransfer to single and two phase flow in a helical coil J. JCH, 1983, 61( 6): 68 72.4 Watanabe O, Tajima O, Shimoya M. Flow and heat transferof a gas and liquid two-phase flow in helical coils J. J HeatTransf er, 1987, 19( 5) : 26 41.5 , ,ba,. 10 MW ? 3 5 E L J.
10、, 1998, 19( 1):15 20.JU Huaiming, LIU Zhiyong, HAN Bing, et al. Two-tubesengineering model test facility for steam generator of 10 MWhigh temperature gas cooled reactor J. J N uclear PowerEng, 1998, 19( 1): 15 20. (in Chinese)6 ,. HTR-10 ? 3 os J. bv(1 S) , 1998, 38( 5): 72 75.JU Huaiming, XU Yuanhu
11、i, HU ANG Zhiyong, et al.Density wave instability in HTR-10 steam generator J. JTsinghua Univ ( Sci and Tech) , 1998, 38( 5) : 72 75. (inChinese)76 (,I 2.m-. A M M .:0?, 1993.XU Jijun, JIA Dounan. Heat Transfer and Vapor-Water TwoPhase Flow M . Beijing: Atomic Energy Press, 1993.( in Chinese)8(. . M .:Yv,1998.T AO Wenquan. Heat Transfer M . Xi an: Xi an Jiao TongUniversity Press, 1998. (in Chinese)1217 W ,: 、 、 T/“d“ H9 ZE
