方柱水动力系数确定方法的探讨  

METHOD FOR DETERMINATION OF HYDRODYNAMIC COEFFICIENTS FOR SQUARE CYLINDER

作　　者：李玉成[1] 王凤龙[1] 何明[1] 

机构地区：[1]大连理工大学,大连116024

出　　处：《海洋通报》1994年第2期62-79,共18页Marine Science Bulletin

基　　金：国家自然科学基金项目的部分研究成果

摘　　要：方柱的绕流和圆柱的绕流有着明显的不同.在确定其水动力系数时如何选用波浪理论,以何种方法分析水动力系数较为适当是首先要解决的问题.本文基于实验资料对这二个问题进行了分析论证.结果认为选用线性被理论较为简单和适用,在正向力系数的时域分析中以最小二乘法为最佳,在频域分析中修正互谱法所得的正向力系数与重新定义的Kc数具有良好的相关关系.The flow behaviour around square cylinder is quite different to that around circular cylinder. The most important problems to be tackled in determing the hydrodynamic coefficients with measured forces are how to select the appropriate wave theory and analytical method. Based on the analysis of model test data, these two problems are approached in this paper. It is concluded that using linear wave theory is more suitable and much simpler. In determining inline force coefficient the least square method is the best in time domain analysis, while the modified cross-spectral analysis is the best in frequency domain analysis. The force coefficients are well related to the redefined Kc number.

关 键 词：方柱 波力 Morisom方程 水动力系数 波浪 线性波 频域分析 

分 类 号：P731.22[天文地球—海洋科学]