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1、^△^產(chǎn)拖曳線列陣甲臺(tái)背景信口
2、仿真模塊設(shè)計(jì)摘要水聲對(duì)抗技術(shù)已成為海軍的重要研究課題,對(duì)艦船輻射噪聲的仿真是重要的水聲對(duì)抗技術(shù)之一,在拖曳線列陣平臺(tái)背景下,實(shí)時(shí)地模擬艦船輻射噪聲,是本課題的研究重點(diǎn)。實(shí)時(shí)模擬艦船輻射噪聲需要處理的數(shù)據(jù)量很大,對(duì)計(jì)算機(jī)的內(nèi)存資源及計(jì)算速度有較高要求,利用高性能計(jì)算機(jī)和并行計(jì)算能夠降低單個(gè)問(wèn)題的求解時(shí)間,是進(jìn)行大規(guī)模計(jì)算發(fā)展的必然趨勢(shì),因此對(duì)本文實(shí)時(shí)模擬艦船輻射噪聲并行計(jì)算的研究,具有一定的研究意義和應(yīng)用價(jià)值。本文首先討論了并行計(jì)算機(jī)的分類,lBMBladeCenterHS21刀片服務(wù)器的特點(diǎn)及操作過(guò)程,并
3、行程序設(shè)計(jì)時(shí)應(yīng)注意的問(wèn)題及并行調(diào)試技術(shù),分析了艦船輻射噪聲的特性,通過(guò)研究典型的集群系統(tǒng)結(jié)構(gòu),成功實(shí)現(xiàn)了在CcntOSLinux環(huán)境下,基于MPI和Linux的集群系統(tǒng)的構(gòu)建,并行實(shí)現(xiàn)了拖曳線列陣接收艦船輻射噪聲的仿真,包括利用查表法生成線譜,連續(xù)譜的生成,根據(jù)輻射噪聲包絡(luò)譜生成具有艦船輻射噪聲特性的噪聲,通過(guò)對(duì)噪聲功率譜的分析得知,在噪聲低頻端,噪聲主要表現(xiàn)為線譜,隨著頻率的增高,連續(xù)譜成為噪聲的主要成分,且連續(xù)譜具有規(guī)律地衰減。為了更具真實(shí)性,實(shí)現(xiàn)艦船運(yùn)行軌跡可以實(shí)時(shí)的、任意角度的變化。為驗(yàn)證輻射噪聲生成的正確性,進(jìn)行了正確性分析,
4、其中包括譜特征的驗(yàn)證、各陣元間時(shí)延關(guān)系、波束形成、相關(guān).性分析、實(shí)時(shí)性分析以及連續(xù)性分析。通過(guò)分析可知,在毋MBladeCenterHS21刀片服務(wù)器上,基于拖曳線列陣平臺(tái)背景艦船輻射噪聲仿真的并行實(shí)現(xiàn),符合理論要求,到達(dá)了預(yù)期目標(biāo)。關(guān)鍵詞:艦船輻射噪聲;刀片服務(wù)器;并行計(jì)算;MPI;實(shí)時(shí)性、八參≮產(chǎn)拖曳線列陣sF臺(tái)背景信號(hào)仿真模塊設(shè)計(jì)ABSTRACTAcousticWarfareTechnologyhasbeenaimportantresearchsubjectofthenavy,andthesimulationoftheship·r
5、adiatednoiseisanimportanttechnologyoftheAcousticWarfare.Underthebackgroundoftowedlinearrayplatform,simulatingtheship-radiatednoisereal—timelyistheimportantresearchemphasisofthesubject.However,simulatingtheship-radiatednoisereal—timelyhastoprocessmassivedata,whichhashi.gh
6、demandsofthecomputermemoryandthecomputingspeed.Usingthehighperformancecomputerandparallelcomputingcanreducethesolutiontimeofsingleproblem,whichistheinevitabletrendoflargescalecompute.Sotheparallelcomputeresearchofsimulatingtheship·radiatednoisereal·timelyhassomeresearchs
7、ignificanceandvalue.Firstly,thepaperdiscusstheclassificationoftheparallelcomputer,theoperatingprocessandfeaturesoftheIBMBladeCenterHS21BladeServer,someproblemsneedingattentionaboutparallelprogrammingandparalleldebuggingtechnology,analysisthefeaturesofship-radiatednoise.T
8、hepaperconstructedaclustersystemsuccessfullybasedonMPIandCentOSlinuxbyresearchingthetypicalclustersystemstructure,completedparallelimplementationaboutthesimulationoftheship·radiatednoisereceivedbythetowedlinearraysonar,includingthegenerationoflinespectrumbasedontablelook
9、up,thegenerationofthecontinuousspectrum,andthenoisewithfeaturesofship-radiated.Fromtheanalysisofthenois