Stochastic analysis of nonlinear coupled heave-pitch motion for the Truss Spar platform
Stochastic analysis of nonlinear coupled heave-pitch motion for the Truss Spar platform
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DOI：
10.1007/s11804-011-1093-y
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发表时间：
2011-11
影响因子：
1.8
通讯作者：
Wenjun Shen;You-gang Tang
中科院分区：
文献类型：
--
作者：
Wenjun Shen;You-gang Tang
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.
