Rules of Classiˉcation Societies all around the world have made changes on design wave loads' value and
fatigue in°uence factor modiˉcation due to the in°uence of springing and whipping on ultra-large containerships.
The paper ˉrstly introduced 3-D linear hydroelastic theory in frequency domain and 3-D nonlinear hydroelastic
theory in time domain, considering large amplitude motion nonlinearity and slamming force due to the severe
relative motion between ship hull and wave. Then the spectrum analysis method and time domain statistical
analysis method were introduced, which can make fatigue analysis under a series of standard steps in frequency and
time domain, respectively. Finally, discussions on the in°uence factor of springing and whipping on fatigue damages
of 8500TEU and 10000TEU containerships with di?erent loading states were made. The fatigue assessment of
di?erent position on the midship section was done on the basis of nominal stress. The fatigue damage due to
whipping can be the same as the fatigue damage due to springing and even sometimes can be larger than the
springing damage. Besides, some suggestions on calculating load case selection were made to minimize the quantity
of work in frequency and time domain. Thus, tools for fatigue in°uence factor modiˉcation were provided to meet
the demand of IACS-UR.
REN Huilong (任慧龙), ZHANG Kaihong (张楷弘), LI Hui (李辉)
. Research of Springing and Whipping Influence on Ultra-Large Containerships' Fatigue Analysis[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(3)
: 429
.
DOI: 10.1007/s12204-018-1956-3
[1] IACS. Container ships guidelines for surveys, assessment and repair of hull structures [M]. London: Wither& Co. Ltd., 2005.
[2] American Bureau of Shipping. Guidance Notes onwhipping assessment for container carriers: ABS 0173-2014 [S]. Houston, TX: ABS, 2014.
[3] American Bureau of Shipping. Guidance Notes onspringing assessment for container carriers: ABS 0172-2014 [S]. Houston, TX: ABS, 2014.
[4] WU Y S, PRICE W G. A general form of interfaceboundary condition of °uid-structure interaction andits application [J]. Selected Papers of the Chinese Society of Naval Architecture and Marine Engineering,1985, 1(1): 66-87.
[5] FONSECA N, SOARES C G. Validation of a timedomain strip method to calculate the motions andloads on a fast monohull [J]. Applied Ocean Research,2004, 26(6): 256-273.
[6] FONSECA N, SOARES C G. Time-Domain analysis oflarge-amplitude vertical ship motions and wave loads[J]. Journal of Ship Research, 1998, 42(2): 139-153.
[7] DAI Y S, DUAN W Y. Potential °ow theory of shipmotions in waves [M]. Beijing: National Defense Industry Press, 2008 (in Chinese).
[8] DAI Y S, SHEN J W, SONG J Z. Ship wave loads[M]. Beijing: National Defense Industry Press, 2007(in Chinese).
[9] DRUMMEN I. Experimental and numerical investigation of nonlinear wave-induced load e?ects in containerships considering hydroelasticity [D]. Trondheim,Norway: NTNU, 2008.
[10] OGILVIE T F. Recent progress toward the understanding and prediction of ship motions[C]//Proceedings of 5th Symposium on NavalHydrodynamics, Bergen, Norway: ONR, 1964: 3-80.
[11] OLAGNON M, GU?ED?E Z. Rain°ow fatigue analysisfor loads with multimodal power spectral densities [J].Marine Structures, 2008, 21(2/3): 160-176.
[12] JIAO G, MOAN T. Probabilistic analysis of fatiguedue to Gaussian load processes [J]. Probabilistic Engineering Mechanics, 1990, 5(2): 76-83.
[13] RATHJE H, KAHL A, SCHELLIN T E. HighFrequency ship response assessment of large containerships [J]. International Journal of O?shore and PolarEngineering, 2012, 22(2): 115-122.
[14] SENG S. Slamming and whipping analysis of ships [D].Lyngby, Denmark: Technical University of Denmark,2012.
[15] WIRSCHING P H, SHEHATA A M. Fatigue underwide band random stresses using the rain-°ow method[J]. Journal of Engineering Materials and Technology,1977, 99(3): 205-211.
[16] IACS. No.34 standard wave data [EB/OL]. [2017-08-25]. http://www.iacs.org.uk.
