Tibeuleu/KozaiLidov
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display sma and ecc for 2 bodies

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Thibault Barnouin
2021-11-19 16:28:41 +01:00
parent 400e140c35
commit 1c20570200
2 changed files with 7 additions and 7 deletions
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8
lib/plots.py
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@@ -116,7 +116,7 @@ def display_parameters(E,L,sma,ecc,parameters,savename=""):
ax1 = fig1.add_subplot(111)
for i in range(len(E)):
ax1.plot(np.arange(E[i].shape[0])*step[i]/yr, np.abs((E[i]-E[i][0])/E[i][0]), label="step of {0:.2e}yr".format(step[i]/yr))
ax1.set(xlabel=r"$t [yr]$", ylabel=r"$\left|\frac{\delta E_m}{E_m(t=0)}\right|$", yscale='log')
ax1.set(xlabel=r"$t \, [yr]$", ylabel=r"$\left|\frac{\delta E_m}{E_m(t=0)}\right|$", yscale='log')
ax1.legend()
fig1.suptitle(title1.format("mechanical energy")+title2)
fig1.savefig("plots/{0:s}dEm.png".format(savename),bbox_inches="tight")
@@ -127,16 +127,16 @@ def display_parameters(E,L,sma,ecc,parameters,savename=""):
dL = ((L[i]-L[i][0])/L[i][0])
dL[np.isnan(dL)] = 0.
ax2.plot(np.arange(L[i].shape[0])*step[i]/yr, np.abs(np.sum(dL,axis=1)), label="step of {0:.2e}yr".format(step[i]/yr))
ax2.set(xlabel=r"$t [yr]$", ylabel=r"$\left|\frac{\delta \vec{L}}{\vec{L}(t=0)}\right|$",yscale='log')
ax2.set(xlabel=r"$t \, [yr]$", ylabel=r"$\left|\frac{\delta \vec{L}}{\vec{L}(t=0)}\right|$",yscale='log')
ax2.legend()
fig2.suptitle(title1.format("kinetic moment")+title2)
fig2.savefig("plots/{0:s}dL2.png".format(savename),bbox_inches="tight")
fig3 = plt.figure(figsize=(15,7))
ax3 = fig3.add_subplot(111)
ax3.plot(np.arange(sma.shape[0])*step[i]/yr, sma, label="a (semi major axis)")
ax3.plot(np.arange(sma.shape[0])*step[i]/yr, sma/au, label="a (semi major axis)")
ax3.plot(np.arange(ecc.shape[0])*step[i]/yr, ecc, label="e (eccentricity)")
ax3.set(xlabel=r"$t [yr]$", ylabel=r"$a [au] or e$")
ax3.set(xlabel=r"$t \, [yr]$", ylabel=r"$a \, [au] \, or \, e$")
ax3.legend()
fig3.suptitle("Semi major axis and eccentricity "+title2)
fig3.savefig("plots/{0:s}a_e.png".format(savename),bbox_inches="tight")

6
main.py
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@@ -27,8 +27,8 @@ def main():
v = np.array([v1, v2, v3])
#integration parameters
duration, step = 100*yr, np.array([1./(365.25*2.), 1./(365.25*2.), 1./365.25])*yr #integration time and step in years
duration, step = 100*yr, np.array([1./(365.25*2.), 1./(365.25*1.), 5./(365.25*1.)])*yr #integration time and step in years
step = np.sort(step)[::-1]
integrator = "leapfrog"
n_bodies = 2
display = False
@@ -52,7 +52,7 @@ def main():
parameters = [duration, step, dyn_syst, integrator]
display_parameters(E, L, sma, ecc, parameters=parameters, savename=savename)
print(sma/au)
return 0
if __name__ == '__main__':