潮流能发电平台的水动力特性的参数影响研究

Influence of parameters on hydrodynamic characteristics of tidal power platform

文章采用水动力分析软件AQWA对潮流能发电平台进行了研究,对平台有限元模型进行了简化,通过对比水动力参数的变化,确定了简化模型的可靠性;基于简化模型分别计算了发电平台在0°浪向作用时,不同水深及不同重心高度下的一阶波浪力、附加质量、辐射阻尼等水动力参数。结果表明:水深显著影响一阶波浪力的峰值大小,对附加质量和辐射阻尼影响较小;水深越浅,海底对波浪的反射作用越明显,平台受波浪冲击越大;重心高度的变化主要影响平台横摇和纵摇2个方向上的水动力参数,对其他方向影响很小。

The hydrodynamic characteristics of tidal power platform are studied by using the hydrodynamic calculation software AQWA.The finite element model of the platform is simplified,and the reliability of the simplified model is determined by comparing the changes of the hydrodynamic parameters.Based on the simplified model,the first-order wave force,radiation damping and added mass in different water depth or height of gravity center are calculated when the wave direction angle is 0 degree.The results show that the water depth significantly affects the peak value of first-order wave force,which has little effect on the added mass and radiation damping.The more shallow the water depth,the more obvious the reflection of the seafloor to the waves,the greater the impact of the waves on the platform.The height of gravity center mainly influences the hydrodynamic characteristics of the platform in the direction of roll and pitch,and has little effect on other directions.