Citation:
Wenjun Shen and Yougang Tang.Stochastic Analysis of Nonlinear Coupled Heave-Pitch Motion for the Truss Spar Platform[J].Journal of Marine Science and Application,2011,(4):471-477.[doi:10.1007/s11804-011-1093-y]
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Stochastic Analysis of Nonlinear Coupled Heave-Pitch Motion for the Truss Spar Platform
Wenjun Shen and Yougang Tang.Stochastic Analysis of Nonlinear Coupled Heave-Pitch Motion for the Truss Spar Platform[J].Journal of Marine Science and Application,2011,(4):471-477.[doi:10.1007/s11804-011-1093-y]
Info
- Title:
- Stochastic Analysis of Nonlinear Coupled Heave-Pitch Motion for the Truss Spar Platform
- Author(s):
- Wenjun Shen and Yougang Tang
- Affilations:
- Keywords:
- Truss Spar platform; heave-pitch nonlinear coupling; stochastic waves; parametric-forced excitation; Mathieu instability
- DOI:
- 10.1007/s11804-011-1093-y
- Abstract:
- Considering the static stability and the change of the displacement volume, including the influences of higher order nonlinear terms and the instantaneous wave surface, the nonlinear coupled heave-pitch motion was established in stochastic waves. The responses of heave-pitch coupling motion for the Truss Spar platform were investigated. It was found that, when the characteristic frequency of a stochastic wave is close to the natural heave frequency, the large amplitude pitch motion is induced under the parametric-forced excitation, which is called the Mathieu instability. It was observed that the heave mode energy is transferred to pitch mode when the heave motion amplitude exceeds a certain extent. In addition, the probability of internal resonant heave-pitch motion is greatly reduced while the characteristic wave frequency is away from the natural heave frequency.
References:
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Memo
- Memo:
- Supported by the National Natural Science Foundation of China（No. 51079097, 50879057）
