共查询到18条相似文献,搜索用时 203 毫秒
1.
2.
潜体波浪中近水面不同潜深和航向时运动和波浪力计算 总被引:1,自引:0,他引:1
本文对潜水细长体波浪中近水面运动和波浪力的计算,采用STF理论和Frank源分布紧密拟合方法预报波频运动和波浪力响应;采用Newman细长体方法和3-D修正处理计算垂直面低速潜体的二阶平均波浪与与力矩。该方法和计算程序的实用性和可靠性已经被多次模型结果比较,验证所证实。本文以某一国外典型潜艇为例,计算了七种潜深,七种相浪向下艇体的近水面波频运动响应与波浪力响应,给出了几种运动与波浪力参数变化与浪向变化的计算实例,同时还给出采用线性叠加原理得出的波频运动与波浪力时域历程曲线实例。 相似文献
3.
4.
用Frank源分布-紧密拟合法对一带鳍潜艇的剖面流体动力进行数值计算,然后通过STF方法妥该潜艇波浪中近水面航行时的波频运动响应。计算结果与中国船舶科学研究国心(CSSRC)耐波性水池首次进行的潜艇自航模近水面耐波性试验的结果进行了比较,相符程度令人满意。证实了本文方法和程序对潜艇近水面运动的波频响应进行预报可获满意的结果,具有实用性。也表明了在耐波性水池中对水客性良好的潜艇自航模,采用自动操舵系统控制浸深和航向,进行近水面耐波性试验是成功的。 相似文献
5.
潜艇上二阶波浪力的考察 总被引:2,自引:0,他引:2
本文从公开发表的资料中选取了一典型潜艇,利用二阶波浪力的切片理论计算其在近水面航行时受到的二阶定常力和倍频力,考察了它们的随浪向、潜深及入射波频率变化的规律,特别考察了附体(首舵、尾舵及指挥台)的潜艇所受二阶波浪力的影响。对潜艇设计和航态控制有积极的指导意义。 相似文献
6.
7.
潜体近水面波浪力试验研究 总被引:9,自引:2,他引:7
本文介绍了潜体模型近不面波浪力测试试验的方法,给出了试验结果。从一阶波浪力(矩)及平均二阶波浪力的测量分析结果与理论计算结果相比较来看,试验结果令人满意,说明本试验及试验分析方法、程序正确、实用,今后水面及近水面物体波浪力测量试验打下了基础。 相似文献
8.
通过对潜体近水面航行波浪力作用下非线性运动响应进行建模和计算,揭示了由于二阶波浪力民低速时潜艇操纵面舵力之不足,潜体的定深控制可能难于实现,产生逐渐上浮与露出波面的非线性现象。计算结果与自由自航模的试验结果相当吻合。 相似文献
9.
在导弹潜艇性能研究史,波浪中近水面的运动稳定性是一个特别棘手的问题,尽管巴黎水池在建立其数值模拟程序方面已做了大量的工作,但试验仍然是评估潜艇稳定系统的性能计算程序和其结构尺寸设计所必需的方法。 相似文献
10.
本文使用解耦控制的思想探讨了潜艇在的水面运动时、在波浪干扰下的垂直面运动控制问题,并在此基础上给出了潜艇近水面运动特性的预报方法。 相似文献
11.
This paper presents parametric studies of nonlinear wave forces on large-scale submerged tunnel element. A transportation project of submerged tunnel element under irregular wave conditions is taken as the research background. Three-dimensional diffraction potential and radiation potential associating with the motion of the floating body are utilized, and an efficient three dimensional Green function is implemented to solve the radiation-diffraction problem. A computational method for calculating the nonlinear wave forces of the submerged tunnel element is developed. The present method is validated by the existed methods and experimental data, and good agreements are observed for all test models. The effects of wave parameters and structural parameters on the second-order nonlinear wave forces are studied. Results from the present study can provide valuable recommendations for the weather window and downtime frequencies, the configuration of tugboats, the arrangement of sea-route, and the size and type of the design and construction of the submerged tunnel element. 相似文献
12.
斜浪中二维潜体的二阶定常力 总被引:3,自引:0,他引:3
本文主要研究斜浪中作用于二维潜体(或看作为无限长的潜没柱体)上二阶定常波浪力的的力学机理和计算方法.研究表明.对圆柱而言,水平方向定常力在任意浪向中均可忽略.文中进而考察了潜没深度、浪向角和波浪频率对潜体垂向定常力的影响.同时,附带地证明了用于斜浪中二维绕射问题求解的格林函数在浪向角趋于横浪情况时可退化成横浪二维绕射问题中的格林函数. 相似文献
13.
14.
15.
16.
近水面潜体兴波阻力的数值预报和收敛性分析 总被引:1,自引:1,他引:0
基于Nobleses新细长船兴波阻力理论,以匀速直航的定深椭球体为对象,运用新的数值计算方法,考察了物面分块数目、单元节点数目、波向角积分范围和特殊函数的项数对0阶和1阶兴波阻力数值计算结果的影响,并将计算结果与有关权威资料综合互校,证实这种算法对近水面潜体兴波阻力预报是可行的. 相似文献
17.
To achieve rational design in waves for a submerged floating tunnel which has emerged as a new offshore transportation infrastructure, it's necessary to understand its hydrodynamic behavior. For simple but accurate estimation of hydrodynamic forces, a theoretical method is proposed and the tests with physical models in a wave flume were carried out for verification. Morison's equation was used to estimate wave loads composed of inertia force and drag force. Forces calculated by applying the linear wave theory to Morison's equation coincided well with those measured by the tests. The test results showed that mooring systems played a significant role in the movement of the submerged floating tunnel in waves. A pendulum model could be used to describe the motion of the submerged floating tunnel with a single vertical mooring. Based on the verified relations, a simple slack condition which causes the submerged floating tunnel to be unstable was also proposed. The simplified approach proposed by this study proved to be useful in designing the submerged floating tunnel in the initial stage. 相似文献