中文摘要：

通过试验研究了波浪要素对水平固定圆柱杆件水动力系数的影响。试验利用垂直杠杆原理,提取了杆件在波浪下的水平受力历时曲线,基于改造的莫里森方程,计算了不同波浪要素下的水动力系数C_D和C_M取值。定义分析了新的波高参数KH,周期参数KT和雷诺数Re对水动力系数的影响。研究表明,整体拟合法与四点拟合法获得的水动力系数在数值上差异不大。KH、KT及Re均对水动力系数的取值有较显著影响：1）随着波高KH的增大,C_D、C_M整体呈幂指数衰减,且C_M的衰减更为迅速;2）随着波周期KT的增大,C_D、C_M整体亦呈衰减趋势;3）相同波高条件下,C_M随Re数增大而增大,而C_D值相对稳定。最后给出了波浪条件下水动力系数C_D和C_M的经验计算公式。

英文摘要：

The relationship between the horizontal fixed bar structures and the wave parameters was studied. And an upright lever was designed in the experiment to extract the horizontal wave force in time series. Based on the reformed Morison equation, the hydrodynamic coefficients of C_Dand C_Mwere calculated. Wave height parameter KH and wave period parameter KT were investigated and defined. The impact of wave elements including KH,KT and Reynolds number Re was analyzed on the hydrodynamic coefficient.The result shows that all the wave parameters,including wave height（ KH）,wave period（ KT） and Reynolds number（ Re）,have significant influence on the values of hydro-coefficients C_Dand C_M. The results show： 1） both hydro-coefficients C_Dand C_Mdecrease as the wave height KH increase with a powered fitted function; 2） C_Dand C_Malso decrease as the wave period KT increases. However,the fitted relationship is not uniform; 3） given the same wave height,C_Mincreases as Reynolds number（ Re） increases. However,C_D changes little. Based on the results achieved,the authors also give an empirical formula for calculating hydro-coefficients C_Dand C_M,which may give guidance in practical use.