针对大型方沉井拖航过程中的波浪对沉井所受阻力的影响问题，采用基于计算流体力学（CFD）的方法进行不同流速和不同波高组合工况下沉井的拖航水阻力数值模拟.结果表明，沉井的拖航阻力随着沉井迎向、破开和穿过波浪的过程而有所波动;在相同流速时,沉井的拖航阻力随着波高的增加而增加;沉井的拖航阻力随着波高的变化趋势在不同流速时基本一致;沉井拖航阻力随着波高的增大而产生的增量与波高的平方成正比例关系.计算阻力增量百分比表明，波高超过2m之后，阻力的增量百分比接近或超过5%.因此，在工程实践中计算沉井拖航阻力时,建议将波高作为沉井阻力计算的因素之一.

Aiming at the influence of wave on resistance of large square caisson during towing, numerical simulation of towing resistance of caisson under different flow velocities and wave heights was carried out by using computational fluid dynamics (CFD) method. The results show that the towing resistance of caisson fluctuates with the course of caisson heading, breaking and passing through waves. At the same velocity, the towing resistance of the caisson increases with the increase of the wave height. The towing resistance variation of the caisson with the wave height was basically the same at different current rates. The increase of the caisson towing resistance was proportional to the square of the wave height. The calculation of drag increment percentage shows that the percentage of drag increment is close to or more than 5% when the wave height exceeds 2 m. Therefore, it is suggested that wave height should be used as one of the factors for calculating the drag of open caisson in project.