KdV-Burgers 也称Burgers-KdV方程 是一个非线性偏微分方程:[ 1] [ 2]
u
t
+
u
∗
u
x
−
α
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u
x
x
−
β
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u
x
x
x
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{\displaystyle u_{t}+u*u_{x}-\alpha *u_{xx}-\beta *u_{xxx}=0}
解析解
u
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x
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t
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=
(
1
/
25
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∗
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−
3
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250
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β
2
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C
3
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/
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+
(
6
/
25
)
∗
c
o
t
h
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1
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1
/
10
)
∗
x
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β
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C
3
∗
t
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/
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3
/
25
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∗
c
o
t
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1
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10
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∗
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2
/
β
{\displaystyle u(x,t)=(1/25)*(-3+250*\beta ^{2}*_{C}3)/\beta +(6/25)*coth(_{C}1-(1/10)*x/\beta +_{C}3*t)/\beta +(3/25)*coth(_{C}1-(1/10)*x/\beta +_{C}3*t)^{2}/\beta }
u
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x
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=
(
1
/
25
)
∗
(
−
3
+
250
∗
β
2
∗
C
3
)
/
β
+
(
6
/
25
)
∗
t
a
n
h
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C
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(
1
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10
)
∗
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/
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3
∗
t
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/
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+
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3
/
25
)
∗
t
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n
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−
(
1
/
10
)
∗
x
/
β
+
C
3
∗
t
)
2
/
β
{\displaystyle u(x,t)=(1/25)*(-3+250*\beta ^{2}*_{C}3)/\beta +(6/25)*tanh(_{C}1-(1/10)*x/\beta +_{C}3*t)/\beta +(3/25)*tanh(_{C}1-(1/10)*x/\beta +_{C}3*t)^{2}/\beta }
u
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x
,
t
)
=
−
(
1
/
25
)
∗
(
3
+
250
∗
β
2
∗
C
3
)
/
β
−
(
6
/
25
)
∗
t
a
n
h
(
C
1
+
(
1
/
10
)
∗
x
/
β
+
C
3
∗
t
)
/
β
+
(
3
/
25
)
∗
t
a
n
h
(
C
1
+
(
1
/
10
)
∗
x
/
β
+
C
3
∗
t
)
2
/
β
{\displaystyle u(x,t)=-(1/25)*(3+250*\beta ^{2}*_{C}3)/\beta -(6/25)*tanh(_{C}1+(1/10)*x/\beta +_{C}3*t)/\beta +(3/25)*tanh(_{C}1+(1/10)*x/\beta +_{C}3*t)^{2}/\beta }
u
(
x
,
t
)
=
(
1
/
25
)
∗
(
−
(
250
∗
I
)
∗
β
2
∗
C
3
−
3
)
/
β
−
(
6
/
25
∗
I
)
∗
t
a
n
(
C
1
−
(
1
/
10
∗
I
)
∗
x
/
β
+
C
3
∗
t
)
/
β
−
(
3
/
25
)
∗
t
a
n
(
C
1
−
(
1
/
10
∗
I
)
∗
x
/
β
+
C
3
∗
t
)
2
/
β
{\displaystyle u(x,t)=(1/25)*(-(250*I)*\beta ^{2}*_{C}3-3)/\beta -(6/25*I)*tan(_{C}1-(1/10*I)*x/\beta +_{C}3*t)/\beta -(3/25)*tan(_{C}1-(1/10*I)*x/\beta +_{C}3*t)^{2}/\beta }
u
(
x
,
t
)
=
(
1
/
25
)
∗
(
−
(
250
∗
I
)
∗
β
2
∗
C
3
−
3
)
/
β
+
(
6
/
25
∗
I
)
∗
c
o
t
(
C
1
−
(
1
/
10
∗
I
)
∗
x
/
β
+
C
3
∗
t
)
/
β
−
(
3
/
25
)
∗
c
o
t
(
C
1
−
(
1
/
10
∗
I
)
∗
x
/
β
+
C
3
∗
t
)
2
/
β
{\displaystyle u(x,t)=(1/25)*(-(250*I)*\beta ^{2}*_{C}3-3)/\beta +(6/25*I)*cot(_{C}1-(1/10*I)*x/\beta +_{C}3*t)/\beta -(3/25)*cot(_{C}1-(1/10*I)*x/\beta +_{C}3*t)^{2}/\beta }
行波图
参考文献
^ Shu, Jian-Jun. The proper analytical solution of the Korteweg-de Vries-Burgers equation. Journal of Physics A-Mathematical and General. 1987, 20 (2): 49–56. doi:10.1088/0305-4470/20/2/002 .
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*阎振亚著 《复杂非线性波的构造性理论及其应用》 科学出版社 2007年
李志斌编著 《非线性数学物理方程的行波解》 科学出版社
王东明著 《消去法及其应用》 科学出版社 2002
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Eryk Infeld and George Rowlands,Nonlinear Waves,Solitons and Chaos,Cambridge 2000
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