摘要 ： 双体船具有低阻力、高航速、良好操纵性和甲板宽大等优点，但是由于长宽比较小，双体船在斜浪中的扭摇运动比较剧烈。
Abstract : Catamarans feature low resistance, fast speed, good maneuverability, and a large deck area. However, due to their small length to breadth ratio, catamarans can twist in oblique waves.
通过对换热管内流体的运动分析和自旋扭带的转动力矩与阻力矩分析，推导出扭带的转速计算式。
By the kinematic analysis of flow, and the analysis of drive moment and resistance moment, the rotating speed expression of self-rotating twisted tape was deduced.
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