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Liangduo Shen, Zhili Zou, Zhaode Zhang, Yun Pan. Exact solution and approximate solution of irregular wave radiation stress for non-breaking wave[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1809-z
Citation: Liangduo Shen, Zhili Zou, Zhaode Zhang, Yun Pan. Exact solution and approximate solution of irregular wave radiation stress for non-breaking wave[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1809-z

Exact solution and approximate solution of irregular wave radiation stress for non-breaking wave

doi: 10.1007/s13131-021-1809-z
Funds:  The National Natural Science Foundation of China under contract No. 51879237; the General Project of Zhoushan Science and Technology Bureau under contract No. 2019C21026; the General Scientific Research Project of Zhejiang Education Department under contract No. Y201839488; the Fundamental Research Funds for the Provincial Universities under contract No. 2019JZ00011; the foundation of State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University under contract No. 1909.
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  • Corresponding author: E-mail: slduo@zjou.edu.cn
  • Received Date: 2020-10-06
  • Accepted Date: 2020-12-20
  • Available Online: 2021-04-30
  • Wave radiation stress is the main driving force of wave-induced near-shore currents. It is directly related to the hydrodynamic characteristics of near-shore current whether the calculation of wave radiation stress is accurate or not. Irregular waves are more capable of reacting wave motion in the ocean compared to regular waves. Therefore, the calculation of the radiation stress under irregular waves will be more able to reflect the wave driving force in the actual near-shore current. Exact solution and approximate solution of the irregular wave radiation stress are derived in this paper and the two kinds of calculation methods are compared. On the basis of this, the experimental results are used to further verify the calculation of wave energy in the approximate calculation method. The results show that: the approximate calculation method of irregular wave radiation stress has a good accuracy under the condition of narrow-band spectrum, which can save a lot of computing time, and thus improve the efficiency of calculation. However, the exact calculation method can more accurately reflect the fluctuation of radiation stress at each moment and each location.
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