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canales.py
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canales.py
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# Cálculo de tirante crítico y tirante normal en canales
# trapezoidales y circulares
# ------------------------------------------------------
# Carlos Camacho Soto
# Fecha: noviembre 2023
#! /usr/bin/env python
import math
import sys
PI = math.pi
# Funciones de y para usar en método de Newton-Raphson
def funcion_ycT(b,z,y,q):
y1=((b*y+z*(y**2))**1.5)/((b+2*z*y)**0.5)-q/(9.81**0.5)
return y1
def funcion_ynT(b,z,y,q,n,S):
y1=((b*y+z*(y**2))**(5/3))/((b+2*y*(1+z**2)**0.5)**(2/3))-q*n/(S**0.5)
return y1
def funcion_ycC(d,O,q):
O1= ((1/8*(O-math.sin(O)) )**1.5) / ((math.sin(O/2) )**0.5) * (d**2.5) - (q /(9.81**0.5))
return O1
def funcion_ynC(d,O,q,n,S):
O1= (d**(8/3)) * ((1/8*(O-math.sin(O)))**(5/3)) / ((O/2)**(2/3)) - (q*n/(S**0.5))
return O1
# Método de Newton-Raphson para y crítica en canal trapezoidal
def ycriticaT(q,b,z):
h=0.000001
y0=b/2
y1=b/2
dif=1.0
it=0
error=0.000001
while dif>error and it<50:
fy=funcion_ycT(b,z,y0,q)
fyh=funcion_ycT(b,z,y0+h,q)
y1= y0 -(fy*h)/(fyh-fy)
dif=abs(y1-y0)
it=it+1
y0 = y1
return y1
# Método de Newton-Raphson para y normal en canal trapezoidal
def ynormalT(q,b,z,n,S):
h=0.000001
y0=b/2
y1=b/2
dif=1.0
it=0
error=0.000001
while dif>error and it<50:
fy=funcion_ynT(b,z,y0,q,n,S)
fyh=funcion_ynT(b,z,y0+h,q,n,S)
y1= y0 -(fy*h)/(fyh-fy)
dif=abs(y1-y0)
it=it+1
y0 = y1
return y1
# Método de Newton-Raphson para y crítica en canal circular
def ycriticaC(q,d):
h=0.000001
y0=PI
y1=PI
dif=1.0
it=0
error=0.000001
while dif>error and it<50:
fy=funcion_ycC(d,y0,q)
fyh=funcion_ycC(d,y0+h,q)
y1= y0 -(fy*h)/(fyh-fy)
dif=abs(y1-y0)
it=it+1
y0 = y1
y1= d/2*(1+math.cos(PI-y1/2))
return y1
# Método de Newton-Raphson para y normal en canal circular
def ynormalC(q,d,n,S):
h=0.000001
y0=PI
y1=PI
dif=1.0
it=0
error=0.000001
while dif>error and it<50:
fy=funcion_ynC(d,y0,q,n,S)
fyh=funcion_ynC(d,y0+h,q,n,S)
y1= y0 -(fy*h)/(fyh-fy)
dif=abs(y1-y0)
it=it+1
y0 = y1
y1= d/2*(1+math.cos(PI-y1/2))
return y1
# Cuerpo del programa
print("---------------------------------------")
print(" Cálculo de yCrítica y yNormal")
print("---------------------------------------")
print("Tipo de canal: ")
tipo=input("T/t= Trapezoidal C/c=Circular : ? ")
print("---------------------------------------")
if tipo.lower()=="c" :
print(">>>>>>>> Canal Circular <<<<<<<<")
q= float(input("Caudal [m3/s] : "))
d= float(input("Diámetro [m] : "))
n= float(input("n de Manning : "))
S= float(input("Pendiente [m/m]: "))
print("------------------------------------")
print(f"y Crítica [m] : {ycriticaC(q,d)}")
print(f"y Normal [m] : {ynormalC(q,d,n,S)}")
print("------------------------------------")
else :
print(">>>>>>> Canal Trapezoidal <<<<<<<")
q= float(input("Caudal [m3/s] : "))
b= float(input("Ancho (b) [m] : "))
z= float(input("Talud (Z) : "))
n= float(input("n de Manning : "))
S= float(input("Pendiente [m/m]: "))
print("---------------------------------------")
print(f"y Crítica [m] : {ycriticaT(q,b,z)}")
print(f"y Normal [m] : {ynormalT(q,b,z,n,S)}")
print("---------------------------------------")
#EOF crcs2023