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>> a=5.0;L=10.0;B=10.0; rho=1000.0;gra=9.81;W=100000.0; ratio=L/a; theta=linspace(0.0,pi/2.0); VoverVw=cos(theta)+0.5*ratio*cos(theta).*(theta); options=optimset('display','off'); figure(1) subplot(1,2,1) plot(theta*180/pi,VoverVw,'k') axis([0.0,90.0,0.0,1.5]) ylabel('V/V_w') xlabel('/theta(degrees)') grid on hold on MaxTheta=inline('1-(cos(theta)+0.5*ratio*cos(theta).*sin(theta))','theta','ratio'); ThetaMaxDeg=fzero(MaxTheta,[0.01,pi/2.0],options,ratio)*180/pi; plot(ThetaMaxDeg,1.0,'sk') text(19,0.95,['\theta_{max}=',num2str(ThetaMaxDeg,4)'\'circ']) ThetaMax Vol=fiminbnd(MaxTheta,0.0,ThetaMaxDeg*pi/180,options,ratio); MaxVol=1-MaxTheta(ThetaMaxVol,ratio); plot(ThetaMaxVol*180.0/pi,MaxVol,'ks') text(10,MaxVol+0.1,['max vol='num2str(MaxVol,4)]) text(10,MaxVol+0.05,['at\theta='num2str(ThetaMaxVol*180/pi,4)'\circ']) subplot(1,2,2) theta=linspace(0.01,ThetamaxDeg*pi/180); h=zeros(1,length(theta)); for i=1:length(theta) r=roots([tan(theta(i))*0.5,a,-a*L]); h(i)=r(2); end plot(theta*180/pi,h) ylabel('h(meters)') xlabel('\theta(degrees)') grid on figure(2) Frod=((B*rho*grav*h.^3)./(6*cos(theta).^2)+0.5*W*L*sin(theta))./(L*sin(theta+acos(cos(theta)/sqrt(2)))); plot(theta*180.0/pi,Frod*le-6 ylabel('F_{rod}(MN)') xlabel('\theta(degrees)') grid on Matrix dimensions must agree.£¨ÔËÐкóËùÏÔʾµÄ£©ÔõôÀ´½â¾ö°¡£¿£¿£¿ |
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xiegangmai
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hpuwyb: ½ð±Ò+2 2013-05-10 10:41:04
ben_ladeng: ½ð±Ò+2, лл½»Á÷ 2013-05-11 17:21:11
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hpuwyb: ½ð±Ò+2 2013-05-10 10:41:04
ben_ladeng: ½ð±Ò+2, лл½»Á÷ 2013-05-11 17:21:11
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Â¥Ö÷ÊÇÔÚ³öÌ⿼´ó¼ÒÂ𣿠µÚ18ÐÐӦΪ£º text(19,0.95,['\theta_{max}=', num2str(ThetaMaxDeg,4),'\circ']) µÚ19ÐУº ThetaMax VolÊÇÉñÂí¶«¶«£¬Öмä¼Ó¸ö¿Õ¸ñ±íʾʲô£¿ fiminbndÊÇʲô£¬×Ô¶¨ÒåµÄº¯Êý£¿ÊÇfminbnd°É£¿ µÚ23ÐУº text(10,MaxVol+0.05,[num2str(ThetaMaxVol*180/pi,4),'\circ']) µÚ36ÐУº gravÊÇÉñÂí¶«¶«£¿ [ Last edited by xiegangmai on 2013-5-9 at 22:50 ] |

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