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ѾͷѾͷ2014

Òø³æ (СÓÐÃûÆø)

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Èçͼ£¬x2,y2Ϊת×Ó·½³Ì£¬ÎÒÏëÇóx2,y2ÇúÏßΧ³ÉµÄÃæ»ý£¬ÓÃmatlab±àд³ÌÐòÈçÏ£º
z1=6;
z2=z1-1;
R=48.78;
r=8.13;
Q=R-r;
e=7.05;
syms theta
k=12.6;
f=r/e;
a=sin(z1*theta);
b=f+cos(z1*theta);
m=atan(a./b);
p=m-theta;       %theta
c=sin(theta+p);
n=asin(f*c);
o=n-p;          %phi
g=(z1/z2)*o;    %psi

x2t=Q*sin(theta)+e*sin(z2*theta)-k*sin(p);       %ԭʼ³ÝÐÎ
y2t=Q*cos(theta)-e*cos(z2*theta)+k*cos(p);
x3t=x2t.*cos(o-g)-y2t.*sin(o-g)-e*sin(g);        %¹²éî³ÝÐÎ
y3t=x2t.*sin(o-g)+y2t.*cos(o-g)-e*cos(g);


d2=diff(x3t);
ds2=inline(y3t.*d2);
s2=5*quadl(ds2,0,2*pi/5)
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wurongjun

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

feixiaolin: ÊýѧEPI+1, 2015-07½±Àø 2015-08-01 18:06:03
feixiaolin: Ó¦ÖúÖ¸Êý+1 2015-08-01 18:06:24
¶¨×ÓÃæ»ý³ÌÐò:
function dingz
y=4*rombg(@fdz,0,pi/2,1e-2);
disp(num2str(y,6))
function ds1=fdz(t)
z1=6;
z2=z1-1;
R=48.78;
r=8.13;
Q=R-r;
e=7.05;
syms tau;
k=12.6;    %re
f=r/e;
a=sin(z1*tau);
b=f+cos(z1*tau);
m=atan(a./b);
p=m-tau;       %theta
c=sin(tau+p);
n=asin(f*c);
o=n-p;          %phi
g=(z1/z2)*o;    %psi
x2t=Q*sin(tau)+e*sin(z2*tau)-k*sin(p);       %ԭʼ³ÝÐÎ
y2t=Q*cos(tau)-e*cos(z2*tau)+k*cos(p);
d1=diff(x2t);
ds1=subs(y2t.*d1,tau,t);
function y=rombg(f,a,b,er)
h=(b-a);
T(1,1)=h*(feval(f,a)+feval(f,b))/2;
i=2;h=h/2;
T(i,1)=T(1,1)/2+h*feval(f,(a+b)/2);
T(i,2)=(4*T(2,1)-T(1,1))/3;
while abs(T(i,i)-T(i-1,i-1))>er
    i=i+1;h=h/2;
    T(i,1)=T(i-1,1)/2+h*sum(feval(f,a+h:2*h:b));
    for k=2:1:i
        T(i,k)=(4^(k-1)*T(i,k-1)-T(i-1,k-1))/(4^(k-1)-1);
    end
end
y=T(i,i);
ÔËÐнá¹û:
8768.86
ת×ÓÃæ»ý³ÌÐò:
function zhuanz
y=rombg(@fzz,0,16.65*pi/10,1e-2);
disp(num2str(y,6));
function ds2=fzz(t)
z1=6;
z2=z1-1;
R=48.78;
r=8.13;
Q=R-r;
e=7.05;
syms tau
k=12.6;
f=r/e;
a=sin(z1*tau);
b=f+cos(z1*tau);
m=atan(a./b);
p=m-tau;       %theta
c=sin(tau+p);
n=asin(f*c);
o=n-p;          %phi
g=(z1/z2)*o;    %psi
x2t=Q*sin(tau)+e*sin(z2*tau)-k*sin(p);       %ԭʼ³ÝÐÎ
y2t=Q*cos(tau)-e*cos(z2*tau)+k*cos(p);
x3t=x2t.*cos(o-g)-y2t.*sin(o-g)-e*sin(g);        %¹²éî³ÝÐÎ
y3t=x2t.*sin(o-g)+y2t.*cos(o-g)-e*cos(g);
d2=diff(x3t);
ds2=subs(y3t.*d2,tau,t);
function y=rombg(f,a,b,er)
h=(b-a);
T(1,1)=h*(feval(f,a)+feval(f,b))/2;
i=2;h=h/2;
T(i,1)=T(1,1)/2+h*feval(f,(a+b)/2);
T(i,2)=(4*T(2,1)-T(1,1))/3;
while abs(T(i,i)-T(i-1,i-1))>er
    i=i+1;h=h/2;
    T(i,1)=T(i-1,1)/2+h*sum(feval(f,a+h:2*h:b));
    for k=2:1:i
        T(i,k)=(4^(k-1)*T(i,k-1)-T(i-1,k-1))/(4^(k-1)-1);
    end
end
y=T(i,i);
½á¹û:
6546.81
˵Ã÷:×¢Òâ»ý·ÖÇø¼ä²»ÊÇ[0£¬2*pi],ÎÒÈ¡ÁËÒ»¸ö½üËÆÖµ[0,16.65*pi/10]

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ÉÆ¶ñµ½Í·ÖÕÓб¨,È˼äÕýµÀÊDz×É£.
18Â¥2015-07-22 20:34:19
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ѾͷѾͷ2014

Òø³æ (СÓÐÃûÆø)

Ëͺ컨һ¶ä
ÒýÓûØÌû:
18Â¥: Originally posted by wurongjun at 2015-07-22 20:34:19
¶¨×ÓÃæ»ý³ÌÐò:
function dingz
y=4*rombg(@fdz,0,pi/2,1e-2);
disp(num2str(y,6))
function ds1=fdz(t)
z1=6;
z2=z1-1;
R=48.78;
r=8.13;
Q=R-r;
e=7.05;
syms tau;
k=12.6;    %re
f=r/e;
a=sin(z1* ...

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19Â¥2015-08-04 17:52:35
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ѾͷѾͷ2014

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by cooooldog at 2015-07-18 08:32:42
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ѾͷѾͷ2014

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by wurongjun at 2015-07-17 11:09:33
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6Â¥2015-07-20 10:52:02
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wurongjun

ר¼Ò¹ËÎÊ (Ö°Òµ×÷¼Ò)

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ÒÔǰ»Ø´ð¹ýÕâ¸öÀàËÆÎÊÌâ!
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Õâ¸öаæµÄMatlabÀïÃæÒѾ­¿ÉÒÔ½â¾öÀ²!
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cooooldog

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ส็็็

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1. ÎÊÎÊÌâ×Ô¼ºÏȰÑÎÊÌ⾡¿ÉÄÜÃèÊöÇåÇå³þ³þºÜÖØÒª;

2. ¶¨×ÓÇúÏß·½³ÌÊÇÒ»Ìõ±ÕºÏµÄÇúÏß
ÇóÖú¡ª¡ª»ý·ÖÇóÃæ»ýÓöµ½ÎÊÌâ-1

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3. Äã×Ô¼ºµÄ´úÂë³ýÁËÓÐһЩÒÑÖªÁ¿µÄ¸³Öµ¿É²Î¿¼Ö®Íâ,ÆäËü¼¸ºõºÁÎÞÒâÒå,¶øÇÒtheta¸útau»ìÓÃ,ÃèÊö²»Ò»Ö¶øÈÃÈË˼ά»ìÂÒ;

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3Â¥2015-07-17 11:18:14
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cooooldog

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ส็็็

ÒýÓûØÌû:
3Â¥: Originally posted by cooooldog at 2015-07-17 11:18:14
1. ÎÊÎÊÌâ×Ô¼ºÏȰÑÎÊÌ⾡¿ÉÄÜÃèÊöÇåÇå³þ³þºÜÖØÒª;

2. ¶¨×ÓÇúÏß·½³ÌÊÇÒ»Ìõ±ÕºÏµÄÇúÏß


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cooooldog

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ส็็็

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ÒýÓûØÌû:
5¥: Originally posted by ѾͷѾͷ2014 at 2015-07-20 10:50:01
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ѾͷѾͷ2014

Òø³æ (СÓÐÃûÆø)

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Mr__Right

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8¥: Originally posted by ѾͷѾͷ2014 at 2015-07-20 14:35:49
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8768.85621710424,
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0~5.235987807991032

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6557.98006735277
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9Â¥2015-07-20 18:49:32
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ѾͷѾͷ2014: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ÕæµÄºÜ°ô À§ÈÅÎÒÒѾõÄÎÊÌâ½â¾öÁË Ð»Ð» 2015-07-21 08:51:32
ÒýÓûØÌû:
8¥: Originally posted by ѾͷѾͷ2014 at 2015-07-20 14:35:49
Äú֮ǰ¸ø³öµÄÁ½¸öͼÐÎÊDz»ÕýÈ·µÄ ÎÒÔÚÎı¾Öи½ÉÏÁËÕýÈ·µÄͼƬ£¬Á½¸öͼÐζ¼ÊÇÒª0-2piÄÚ±ÕºÏÇúÏßΧ³ÉµÄÃæ»ý£¬¶¨×Ó·½³ÌÔÚ0-2piÊDzîÒ»µãµã±ÕºÏµÄ£¬Õâ¸öÊÇΪʲô£¬ÎÒÒ²²»ÊÇÌØ±ðÇå³þ£¬×ª×ӵķ½³Ì£¬ÊÇÒÀÀµ¶¨×Ó·½³Ì²úÉúµÄ£¬ ...

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ÎÒûÓÐÓÃMatlab, ÒòΪ²»Ï²»¶, ÓÃMathematica¼ÆËã, Ò²ÊÇGreen¶¨ÀíÇóÃæ»ý,

´úÂëÈçÏÂ:
CODE:
ClearAll["Global`*"];
R = 4878/100;
r = 813/100;
z1 = R/r;
z2 = z1 - 1;
e = 705/100;
f = r/e;
re = 126/10;
\[Theta] = ArcTan[Sin[z1 \[Tau]]/(f + Cos[z1 \[Tau]])] - \[Tau];
\[CurlyPhi] = ArcSin[f Sin[\[Theta] + \[Tau]]] - \[Theta];
\[Psi] = z1/(z1 - 1) \[CurlyPhi];
curve01 = {(R - r) Sin[\[Tau]] + e Sin[z2 \[Tau]] -
     re Sin[\[Theta]], (R - r) Cos[\[Tau]] - e Cos[z2 \[Tau]] +
     re Cos[\[Theta]]} // FullSimplify;
curve02 = {curve01[[1]] Cos[\[CurlyPhi] - \[Psi]] -
     curve01[[2]] Sin[\[CurlyPhi] - \[Psi]] - e Sin[\[Psi]],
    curve01[[1]] Sin[\[CurlyPhi] - \[Psi]] +
     curve01[[2]] Cos[\[CurlyPhi] - \[Psi]] - e Cos[\[Psi]]} //
   Simplify;

base = ParametricPlot[Evaluate[curve01], {\[Tau], 0, 2 \[Pi]},
   Exclusions -> None, MaxRecursion -> 15, PlotPoints -> 1500,
   AxesStyle -> Arrowheads[.035],
   AxesLabel -> {Style[#, Black, Bold, 21 ,
        FontFamily -> "Times New Roman", Italic] &@"x",
     Style[#, Black, Thick, 21 , FontFamily -> "Times New Roman",
        Italic] &@"y"},
   TicksStyle -> Directive[Black, 14, FontFamily -> "Arial"],
   PlotRangePadding -> Scaled[.1], ImageSize -> 450] /.
  Line[x_] :> {Blue, Thickness[.001], Line[x]}


ParametricPlot[Evaluate[curve02], {\[Tau], 0, 2 \[Pi]},
  Exclusions -> None, MaxRecursion -> 15, PlotPoints -> 1500,
  AxesStyle -> Arrowheads[.035],
  AxesLabel -> {Style[#, Black, Bold, 21 ,
       FontFamily -> "Times New Roman", Italic] &@"x",
    Style[#, Black, Thick, 21 , FontFamily -> "Times New Roman",
       Italic] &@"y"},
  TicksStyle -> Directive[Black, 14, FontFamily -> "Arial"],
  PlotRangePadding -> Scaled[.1], ImageSize -> 450] /.
Line[x_] :> {Red, Thickness[.001], Line[x]}

NIntegrate[
   curve01[[2]] D[curve01[[1]], \[Tau]] -
    curve01[[1]] D[curve01[[2]], \[Tau]], {\[Tau], 0, 2 Pi}]/2 //
NumberForm[#, 10] &

NIntegrate[
   curve02[[2]] D[curve02[[1]], \[Tau]] -
    curve02[[1]] D[curve02[[2]], \[Tau]], {\[Tau],
    0, \[Tau] /. FindRoot[curve02[[2]] == 783/20, {\[Tau], 1.6 Pi}]},
   PrecisionGoal -> 6, Method -> "LocalAdaptive"]/2 //
NumberForm[#, 10] &

ÄãÕÒ¸öMathematicaÔËÐÐϾͿÉÒÔÁË:

Ãæ»ý·Ö±ðÊÇ
8768.856217
ºÍ
6557.980067

±ä³ÉMatlab´úÂëËÆºõûÓÐÌØ±ðµÄ±ØÒª,½âÕâÖÖÎÊÌâ, MatlabËÆºõ²¢Ã»ÓÐÌØÊâµÄÓÅÊÆ,Ö»²»¹ýÓõÄÈË¶à¶øÒÑ.

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

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