双体船

Typical catamaran will have a beam to length ratio of about 50%; Meaning that a 45' catamaran will be about 22' wide.

典型的双体船的宽长比为1比2。这就说明45英尺长的双体船大约22英尺宽。

In this paper, the theory of waterjet propulsion system and the characteristic of waterjet propulsion technology has been researched. Apply Genetic Algorithm and CFD technology, in this paper,to calculate the main parameter of WPC96s waterjet propulsor and simulate the flow of the water in waterjet inlet.

本文以大型穿浪双体船WPC96为研究对象，系统地论述了喷水推进系统的基本结构和理论，研究了穿浪双体船喷水推进系统主要参数的优化，并对喷水推进船舶的推进效率进行了系统理论阐述。

Since 1980s, our country has begun to research and design the SWATH ship.

我国从上世纪80年代开始加大对小水线面双体船的研究和设计，但是工作的重点主要放在小水线面双体船总体结构、水动力及其运动性能等方面。

In this paper the viscous flows around a mathematical SWATH in full scale are simulated based on the computational fluid dynamics commercial software FLUENT. The numerical results of total pressure, wall shear stress and the corresponding viscous resistance coefficient at different velocity are obtained. The computational viscous resistance coefficients are compared with the estimated ones using empirical formula. The validity of the software to predict the three dimensional viscous flows and viscous resi...

利用计算流体力学商业软件 FLUENT对一实尺度小水线面双体船数学船型的粘性绕流进行了数值模拟，得到了不同航速下的船体表面总压力、表面剪切应力分布和相应的粘性阻力系数；将各航速下的粘性阻力计算结果和经验公式估算结果作了比较，验证了 FLUENT用于计算小水线面双体船三维粘性流和粘性阻力的有效性。

Based on the rolling test results of five catamaran models with symmetrical demihulls in the smooth water, when the linear and square dampings are considered, the reduced amplitude coefficients and nondimensional rolling added moment of mass inertia are discussed.

根据5条具有对称片体的双体船模型在静水中横摇试验资料，讨论了双体船横摇附连质量惯性矩系数，线性阻尼以及纯平方规律阻尼下的减幅系数与船型参数的关系，并归纳得这些系数的估算表达式。

Based on the rolling test results of five catamaran models with symmetrical demihulls in the smooth water, when the linear and square dampings are considered, the reduced amplitude coefficients and nondimensional rolling added moment of mass inertia are discussed.

根据5条具有对称片体的双体船模型在静水中横摇试验资料，讨论了双体船横摇附连质量惯性矩系数，线性阻尼以及纯平方规律阻尼下的减幅系数与船型参数的关系。

Author collected and read a great mount of materials about high performance ships, especially about the hydroelastic theory and its related theories, and on the basis of it author developed a kind of theory to analyze the fluid-structure interaction of hybrid catamaran in time domain. This theory could be applied not only for the hybrid aircushion-hydrofoil catamarans, but also for other traditional ships and marine structures.

作者收集、阅读和分析了大量的国内外有关高性能船舶尤其是有关其流固耦合分析理论及相关理论方面的文献，在此基础之上，针对未来船型的发展趋势，提出了一套时域内的有关气-翼复合型高速双体船的流固耦合分析理论和数值计算方法，该分析理论和计算方法还同样适用于气垫船、水翼船等单体或双体常规船舶以及其它海洋工程结构物的流固耦合分析。

Finally, analyse the calculated results of this ship with another catamarans. From this result obtained unsymmetrical catamaran hull of this particular special vibration mode and analyse the vibration mode in order. The calculation is fairly reasonable, for the future of the asymmetric catamarans to calculate the vibration analysis of a number of reference.

最后将本船计算结果与另一艘双体船计算结果进行了比较分析，得到不对称双体船这种特殊船型的特殊振动模态，并就其振动模态出现次序进行了比较分析，说明本次计算是比较合理的，为今后不对称双体船的振动特性分析计算提供了一些的参考。

The high speed wave break catamaran is a new type of vessels with the advantages of high speed deep V vessels, shallow draught broad vessels and catamarans.

项目介绍：高速穿浪双体船是八十年代后期发展起来的一种集高速深V船型，小水线面船型，双体船型优点于一体的新船型。

According to the linear wave resistance theory method,this paper makes a comparison research of the ship resistance for the high-speed round bilge ships,the deep "Vee" vessels,the wave-piercing catamarans,and the high-speed trimaran s while using the high-speed round-bilge ship as a benchmark.

采用阻力理论计算方法，以高速圆舭艇的阻力性能为基准，对高速圆舭艇、深V型船、穿浪双体船以及高速三体船的阻力性能进行了对比研究，对比较结果进行了分析，给出了各船型的最适用航速范围。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。