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1、第23卷第1期(總第133期)船舶V01.23No.12012年2月SHIP&B0ATFebruary,2012[研究與設(shè)計(jì)]水動(dòng)反沖擊力及其應(yīng)用陳振誠陳昕陳嚦(中國科學(xué)院國家天文臺(tái)流體力學(xué)小組北京100012)[摘要]船艇迎浪前進(jìn)時(shí),在風(fēng)浪沖擊下,艏部會(huì)高高翹起、而后又在波谷中跌落,形成縱搖、拍擊、顛簸、失速、航速下降、穩(wěn)定安全性降低等缺點(diǎn)。為了克服這樣的不良航態(tài),必須在水動(dòng)力流場(chǎng)中,造成克服這些弱點(diǎn)的水動(dòng)力和相應(yīng)的水動(dòng)力矩沿船體合理分布。為此。提出設(shè)置不同于常規(guī)船艇的船底浸濕面外形,使之產(chǎn)生足夠強(qiáng)大的水動(dòng)反沖擊力、水動(dòng)升力及相應(yīng)的水動(dòng)航
2、向穩(wěn)定扶正力矩,確保船艇不偏離目標(biāo);憑借足夠強(qiáng)大的的水動(dòng)升力和相應(yīng)的船艇縱向穩(wěn)定扶正力矩,消除船艇的縱搖拍擊;以相應(yīng)的船體橫向穩(wěn)定扶正力矩來克服船艇的橫搖擺動(dòng)。最終確保船艇平穩(wěn)高速地破浪前進(jìn)。而在風(fēng)浪中轉(zhuǎn)彎時(shí)所激起的強(qiáng)大水動(dòng)離心力、水動(dòng)反沖擊力、水動(dòng)升力和相應(yīng)的水動(dòng)助回轉(zhuǎn)力矩、水動(dòng)抗船體向心傾覆扶正力矩又能使船艇以很小的回轉(zhuǎn)半徑高速、穩(wěn)定、安全地在風(fēng)浪中轉(zhuǎn)彎。[關(guān)鍵詞]水動(dòng)反沖擊力;水動(dòng)升力;水動(dòng)助回轉(zhuǎn)力矩;水動(dòng)航向穩(wěn)定扶正力矩;水動(dòng)抗船艇顛簸失速扶正力矩;水動(dòng)抗船艇橫搖擺動(dòng)扶正力矩[中圖分類號(hào)]U661.1[文獻(xiàn)標(biāo)志碼]A[文章編號(hào)】10
3、01—9855(2012)01—002l_05Hydrodynamicanti.●._.-impactftorceanditsSaopplicaticonCHENZhen—chengCHENXinCHENYang(FluidMechanicalGroup,NationalAstronomicalObservatory,ChineseAcademyofSciences,Beijingl00012,China)Abstract:Thispaperresearchesintothehydrodynamicanti-impactforceprodu
4、cedbydiversiontrenchandtrimmingflapswhichfittedontheplanningbottomwettedareawhentheshipsuffersthewaveimpact.Itiswellknownthatthestemwouldbeliftedbythewaveimpactwhentheshipmovesinheadwaves,afterthattheshipwouldfalldowninthewavevalley,whichgoeswiththeshippitch,flap,toss,spee
5、dloss,stabilityandsafetyperformancedecrease.Forthepurposeofovercomingtheseshortcomings,aspecialshapeofbottomwettedareamustbesettoproducestrongenoughhydrodynamicanti-impactforce,hydrod~rnamiclift,correspondinghydrodynamiccoursestabilityrightingforcemoment,hydrodynamicanti-r
6、ollingandanti-pitchingrightingforcemomentwhichkeeptheshipcoursestability,eliminatethepitch,flapaswellasroll,enablethehighspeedandsafetyperformanceofshipinheadwaves.Keywords:hydrodynamicanti-impactforce;hydrodynamiclift;hydrodynamicquickeningturnforcemoment;hydrodyrnamiccou
7、rsestabilityrightingforcemoment;hydrodynamicanti-tossandanti-speedlossrightingforcemoment;hydrodynamicanti-rollingandanti-pitchingrightingforcemoment0引言下,船艇艏部會(huì)先高高翹起,繼而又在波谷中跌落,顛簸失速、橫搖擺動(dòng),安全性較差。為此,我們提出現(xiàn)有的常規(guī)船艇在風(fēng)浪中運(yùn)行時(shí),在迎浪沖擊了設(shè)置不同于常規(guī)船艇的船底浸濕面外形。即在船[收稿日期]2011一o6—02.[修回日期]2011-09—30
8、[作者簡(jiǎn)介]陳振誠(1929一),男,漢族,中國科學(xué)院研究員。主要從事艦船水動(dòng)力學(xué),跨學(xué)科從事電磁流體力學(xué)(太陽磁場(chǎng)、黑子、耀斑)等課題的研究工作。陳昕(1972=),女,漢族,