Testing Method Study of Nonlinearity Characteristic for Pentamarans Motion in Waves

Abstract

Abstract: The nature of pentamarans motion time series in waves was studied by surrogate data method. The motion response of three types of pentamarans in different sea state was predicted theoretically and the surrogate data were generated by the modified Fourier transform. At 005 significant levels, the nature of pentamarans motion time series was identified based on the testing statistics. The results indicate that the nature of motion response system does not change while four sponsons are arranged at the front and after side of the main hull body, and the surrogate data method can distinguish the system nature of pentamarans motion in random waves and also be fit for the identification of motion and wave load response system of ship and offshore structures.

Key words: pentamaran, nonlinearity characteristic, surrogate data, hypothesis testing

CLC Number:

U 661.32

CHEN Zhen. Testing Method Study of Nonlinearity Characteristic for Pentamarans Motion in Waves[J]. Journal of Shanghai Jiaotong University, 2012, 46(03): 417-422.

References

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