第20卷第3期
船舶力学
Vol20 No.3
2016年3月
Journal of Ship Mechanic
Mar.2016
Article ID:1007-7294(2016)03-0288-18
Numerical Prediction and Experimental Measurement on Truss
Spar Motion and Mooring Tension in Regular Waves
XU Guo-chun, MA Qing-wei, DUAN Wen-yang M Shan
( College of Shipbuilding Engineering. Harbin Engineering University, Hurin 150001, China; 2. School of Engineerin
and Mathematical Sciences, City University Indon, Northampton Square, London E1 VOHB, UK
Abstract: This paper presents a numerical and experimental study on the Truss Spar motions in reg-
ular waves. For the numerical calculation, a slender formulation is employed to evaluate wave loads
on hard tank and truss structures of the Spar platform, and the Spar hull and its mooring lines are cou
pled together by their interaction forces and motions. The Spar motions are solved by a set of non
linear equations of a rigid body. A model test was carried out in the wave tank of HEU(Harbin En
gineering University During experiments, an optical measurement system is used to measure mo
tions of the Truss Spar model in waves, and tension transducers are employed to record tension at the
end of mooring lines. The numerical prediction results are compared with corresponding model test
data. Satisfactory agreement is achieved for all the cases considered
Key words: Truss Spar; slender formulation; motions; model test; mooring loads; waves
CLC number: U6617
Document code
doi:10.3969/issn.1007-7294.2016.03.006
0 ntroduction
Truss Spar platforms have been utilized in deep water oil exploitation since about 2002
Generally, it is regarded as the second generation of Spar platforms, evolved from the Classic
Spar. A typical Truss Spar is composed of three parts. The upper hard tank is a cylindrical
hull similar to a Classic Spar. The middle truss section includes a number of slender braces
and square heave plates. At the lower end of the truss section, there is a soft tank, containing
solid ballast to keep stability and adjust draft of the whole platform. Now, some alternatives o
Spar have been developed from the original Truss Spar, such as Ct-sparel
Spar 5, and G-spar. Not only in the industry for oil and gas production, similar structures
similar to Truss Spar are often adopted in the other offshore engineering field, for instance.
Mecabe Wave energy Pump.l and SPAR-TYPE floating wind turbine. Compared to other
floating structures, the Truss Spar has a number of distinctive advantages, such as less con
structing costs, moderate heave motion due to heave plates, less susceptible to vortex-induced
motion, and so on
Received date. 2015-11-04
Biography: XU Guo-chun(1985-), male, Ph D. candidate of Harbin Engineering University, xuguochun@hrbeuedu cn
MA Qing-wei(1955-), male, professor of Harbin Engineering University City University of London
DUA N Wen-yang(1967-), male, professor/tutor of Harbin Engineering University
展开阅读全文