susanhl

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2 years, 83 days

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These are questions asked by susanhl

Hello,

I don't understand why Maple gives me the following error:

Error, (in fsolve/Iterators) unrecognized form

The full maple file:


 

restart

mbal := 0.28e-2:

rbal := 0.2e-1:

Cw := .47:

g := 9.81:

A := Pi*rbal^2:

beta := 3.33*Pi*(1/180):

s0x := .2:

s0y := .25:

rho := 1.293:

l := 2:

vx := diff(sx(t), t);

diff(sx(t), t)

(1)

vy := diff(sy(t), t);

diff(sy(t), t)

(2)

ax := diff(sx(t), `$`(t, 2));

diff(diff(sx(t), t), t)

(3)

ay := diff(sy(t), `$`(t, 2));

diff(diff(sy(t), t), t)

(4)

v0x := cos(beta)*v0;

cos(0.1850000000e-1*Pi)*v0

(5)

v0y := sin(beta)*v0;

sin(0.1850000000e-1*Pi)*v0

(6)

`ΣFx` := -Fdx = mbal*ax;

-Fdx = 0.28e-2*(diff(diff(sx(t), t), t))

(7)

`ΣFy` := -Fz-Fdy = mbal*ay;

-Fz-Fdy = 0.28e-2*(diff(diff(sy(t), t), t))

(8)

Fz := mbal*g;

0.27468e-1

(9)

Fdx := .5*rho*vx^2*A*Cw;

0.1215420e-3*(diff(sx(t), t))^2*Pi

(10)

Fdy := .5*rho*vy^2*A*Cw;

0.1215420e-3*(diff(sy(t), t))^2*Pi

(11)

ics1 := sx(0) = s0x, (D(sx))(0) = v0x;

sx(0) = .2, (D(sx))(0) = cos(0.1850000000e-1*Pi)*v0

(12)

ics2 := sy(0) = s0y, (D(sy))(0) = v0y;

sy(0) = .25, (D(sy))(0) = sin(0.1850000000e-1*Pi)*v0

(13)

verplaatsingx := dsolve({ics1, `ΣFx`}, sx(t));

sx(t) = (1400000/60771)*ln((60771/1400000)*cos((37/2000)*Pi)*v0*exp((60771/7000000)*Pi)*t*Pi+exp((60771/7000000)*Pi))/Pi

(14)

verplaatsingy := dsolve({ics2, `ΣFy`});

sy(t) = (1/243084)*(60771*Pi+2800000*ln((1/92736546000)*(20257*Pi^(1/2)*sin((37/2000)*Pi)*v0*sin((3/70000)*231841365^(1/2)*Pi^(1/2)*t)+20*231841365^(1/2)*cos((3/70000)*231841365^(1/2)*Pi^(1/2)*t))^2))/Pi

(15)

eindy := rhs(verplaatsingy) = rbal;

(1/243084)*(60771*Pi+2800000*ln((1/92736546000)*(20257*Pi^(1/2)*sin((37/2000)*Pi)*v0*sin((3/70000)*231841365^(1/2)*Pi^(1/2)*t)+20*231841365^(1/2)*cos((3/70000)*231841365^(1/2)*Pi^(1/2)*t))^2))/Pi = 0.2e-1

(16)

eindx := rhs(verplaatsingx) = l;

(1400000/60771)*ln((60771/1400000)*cos((37/2000)*Pi)*v0*exp((60771/7000000)*Pi)*t*Pi+exp((60771/7000000)*Pi))/Pi = 2

(17)

t := solve(eindy, t);

RootOf(1397733*Pi+70000000*ln((1/92736546000)*(20257*Pi^(1/2)*sin((37/2000)*Pi)*v0*sin((3/70000)*231841365^(1/2)*Pi^(1/2)*_Z)+20*231841365^(1/2)*cos((3/70000)*231841365^(1/2)*Pi^(1/2)*_Z))^2))

(18)

t := evalf(t[1]);

RootOf(1397733*Pi+70000000*ln((1/92736546000)*(20257*Pi^(1/2)*sin((37/2000)*Pi)*v0*sin((3/70000)*231841365^(1/2)*Pi^(1/2)*_Z)+20*231841365^(1/2)*cos((3/70000)*231841365^(1/2)*Pi^(1/2)*_Z))^2))[1]

(19)

v0 := fsolve(eindx, v0)

Error, (in fsolve/Iterators) unrecognized form

 

``

``


 

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