简介:一个鱼雷的特征“s有多重目标的声学的homing轨道被学习。鱼雷运动的微分方程基于水动力学被介绍。第四个顺序Runge-Kutta方法被用来解决这些方程。源于声纳方程并且敏捷“s法律,一简单虚拟在水下声学的环境为模仿鱼雷homing过程被建立。牛顿迭代法被用来推测homing变化,光线跟踪被片接近明智的线,它由温度,压力,和咸度收进一个给定的海区域进考虑失真原因。某声学的战争设备的影响在某些情形扰乱鱼雷homing过程包括圈套andjammers,也在模拟被考虑。相对目标鉴定逻辑和homing控制法律被介绍。相等的考虑在研究期间被给要求ofreal-timeactivity以及精确性。最后,一个实际鱼雷homing轨道模拟节目被开发并且适用于某些工程。
简介:Thepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasexperimentallyinvestigated.Atotalof177experimentaldatawereobtainedinlaboratorybyvaryingtheundrainedshearstrengthofthetwo-layeredsoilandthethicknessofthetopsoillayer.Thegeometricparametersoftheanchorandthesoilproperties(theliquidlimit,plasticlimit,specificgravity,undrainedshearstrength,density,andwatercontent)weremeasured.Basedontheenergyanalysisandpresenttestdata,anempiricalformulatopredictthepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasproposed.Theproposedformulawasextensivelyvalidatedbylaboratoryandfielddataofpreviousresearchers.Theresultswereingoodagreementwiththoseobtainedfortwo-layeredandsingle-layeredsoilbed.Finally,asensitivityanalysisontheparametersintheformulawasperformed.