【作者】 杜修力； 赵娟； 赵密；

【Author】 Du Xiuli Zhao Juan Zhao Mi (The Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China)

【机构】 北京工业大学城市与工程安全减灾教育部重点实验室；

【摘要】 提出一种计算大直径深水圆柱结构所受动水力的时域算法。大直径深水圆柱结构动水压力计算中,需要考虑水体的可压缩性。基于解析方法推导了频域动水力公式,该公式在时域计算中需要进行快速傅里叶变换或者时间卷积运算,计算量巨大。采用由频域有理函数近似和时域辅助变量实现构成的时间卷积算法,将动水力的频域解析公式实现为高精度、高效率时域算法。算例表明,本文方法具有较高的计算精度和计算效率。更多还原

【Abstract】 A time-domain method is proposed to compute the hydrodynamic pressure on the deep-water cylindrical structure of large diameter.In the computation of the hydrodynamic pressure on the deep-water cylindrical structure of large diameter,the water should be compressible.The frequency-domain hydrodynamic pressure formulation is derived by the analytical method.This formulation has the high costs of computation and storage in time-domain analysis due to the Fast Fourier Transform or temporal convolution computation.Using the convolution algorithm consisting of the frequency-domain rational function approximation and time-domain auxiliary variable realization,the frequency-domain hydrodynamic pressure formulation is transformed into an accurate and efficient method in time domain.The numerical example indicates the effectiveness of the proposed method.更多还原