摘要
双体船的阻力特点是片体波系间相互有干扰。当处于有利干扰时,双体船的阻力小于两个单独片体的阻力之和。干扰的实质是片体间波系的横渡干扰。作者根据三种不同横剖面形状的高速双体船在不同间距比和排水量长度系数下的阻力试验资料,分析船型、间距比、排水量长度系数对阻力的影响,得到高速双体船的有利干扰起始点Fr0和片体间流动阻塞时的FrR0根据本文推荐的Fr0和FrR计算公式,可以选择恰当的航速、间距比和排水量长度系数以满足Fr0<Fr<FrR,使高速双体船处于低阻的有利干扰状态。
The interference of wave system between demihulls of catamaran is analysed. It is proved that the demihulls interact on each other with positive or negative interferences. Only in negative interference condition, the catamaran resistance is lower than that of two separate demihulls due to the advantageous transverse waves generated by two demihulls.Based on the resistance test duta of high-speed catamaran with three different forms at varying spacing ratio k/b and displacement-length ratio / (0.1L)3, the influences of / (0.1 L)3, k/b and ship form on the resistance of catamaran are discussed, and the formulas for calculating Fr0 (the Froude number of starting point of negative interference,above which the negative interference will occur) and FrB (the Froude number with flow blockage between demihulls, above which the resistance of catamaran will greatly increase)are also given. By using the calculation formulas, the apropriate speed, k/b and / (0.1L)3 can be found to satisfy Fr0<Fr< FrB, and the catamaran will thus operate at a lower resistance in negative interference condition.
出处
《中国造船》
EI
CSCD
北大核心
1994年第3期28-39,共12页
Shipbuilding of China
关键词
高速
双体船
片体干扰
阻力试验
High-speed catamaran, Transverse wave interference, Resistance test, Calculation formula