def calcSeismics(meshIn, vP):
"""Do seismic computations."""
meshSeis = meshIn.createH2()
meshSeis = mt.appendTriangleBoundary(meshSeis,
xbound=25,
ybound=22.0,
marker=1,
quality=32.0,
area=0.3,
smooth=True,
markerBoundary=1,
isSubSurface=False,
verbose=False)
print(meshSeis)
meshSeis = meshSeis.createH2()
meshSeis = meshSeis.createH2()
# meshSeis = meshSeis.createP2()
meshSeis.smooth(1, 1, 1, 4)
vP = pg.interpolate(meshIn, vP, meshSeis.cellCenters())
mesh = meshSeis
vP = pg.solver.fillEmptyToCellArray(mesh, vP)
print(mesh)
# ax, cbar = pg.show(mesh, data=vP)
# pg.show(mesh, axes=ax)
geophPointsX = np.arange(-19, 19.1, 1)
geophPoints = np.vstack((geophPointsX, np.zeros(len(geophPointsX)))).T
sourcePos = geophPoints[4]
c = mesh.findCell(sourcePos)
h1 = pg.findBoundary(c.boundaryNodes(0)).size()
h2 = pg.findBoundary(c.boundaryNodes(1)).size()
h3 = pg.findBoundary(c.boundaryNodes(2)).size()
print([h1, h2, h3])
h = pg.math.median([h1, h2, h3])
# h = pg.math.median(mesh.boundarySizes())
f0scale = 0.25
cfl = 0.5
dt = cfl * h / max(vP)
print("Courant-Friedrich-Lewy number:", cfl)
tmax = 40. / min(vP)
times = np.arange(0.0, tmax, dt)
solutionName = createCacheName('seis', mesh, times) + "cfl-" + str(cfl)
try:
# u = pg.load(solutionName + '.bmat')
uI = pg.load(solutionName + 'I.bmat')
except Exception as e:
print(e)
f0 = f0scale * 1. / dt
print("h:", round(h, 2), "dt:", round(dt, 5), "1/dt:",
round(1 / dt, 1), "f0", round(f0, 2), "Wavelength: ",
round(max(vP) / f0, 2), " m")
uSource = ricker(times, f0, t0=1. / f0)
plt.figure()
plt.plot(times, uSource, '-*')
plt.show(block=0)
plt.pause(0.01)
u = solvePressureWave(mesh,
vP,
times,
sourcePos=sourcePos,
uSource=uSource,
verbose=10)
u.save(solutionName)
uI = pg.Matrix()
print("interpolate node to cell data ... ")
pg.interpolate(mesh, u, mesh.cellCenters(), uI)
print("... done")
uI.save(solutionName + 'I')
# nodes = [mesh.findNearestNode(p) for p in geophPoints]
# fig = plt.figure()
# axs = fig.add_subplot(1,1,1)
# drawSeismogramm(axs, mesh, u, nodes, dt, i=None)
# plt.show()
dpi = 92
scale = 1
fig = plt.figure(facecolor='white',
figsize=(scale * 800 / dpi, scale * 490 / dpi),
dpi=dpi)
ax = fig.add_subplot(1, 1, 1)
gci = pg.viewer.mpl.drawModel(ax,
mesh,
data=uI[0],
cMin=-1,
cMax=1,
cmap='bwr')
pg.viewer.mpl.drawMeshBoundaries(ax, meshIn, hideMesh=1)
ax.set_xlim((-20, 20))
ax.set_ylim((-15, 0))
ax.set_ylabel('Depth [m]')
ax.set_xlabel('$x$ [m]')
ticks = ax.yaxis.get_majorticklocs()
tickLabels = []
for t in ticks:
tickLabels.append(str(int(abs(t))))
ax.set_yticklabels(tickLabels)
plt.tight_layout()
# ax, cbar = pg.show(mesh, data=vP)
# pg.showNow()
# ax = fig.add_subplot(1,1,1)
def animate(i):
i = i * 5
if i > len(uI) - 1:
return
print("Frame:", i, "/", len(uI))
ui = uI[i]
ui = ui / max(pg.abs(ui))
ui = pg.logDropTol(ui, 1e-2)
cMax = max(pg.abs(ui))
pg.viewer.mpl.setMappableData(gci,
ui,
cMin=-cMax,
cMax=cMax,
logScale=False)
# plt.pause(0.001)
anim = animation.FuncAnimation(fig,
animate,
frames=int(len(uI) / 5),
interval=0.001,
repeat=0) # , blit=True)
out = 'seis' + str(f0scale) + "cfl-" + str(cfl)
anim.save(out + ".mp4",
writer=None,
fps=20,
dpi=dpi,
codec=None,
bitrate=24 * 1024,
extra_args=None,
metadata=None,
extra_anim=None,
savefig_kwargs=None)
try:
print("create frames ... ")
os.system('mkdir -p anim-' + out)
os.system('ffmpeg -i ' + out + '.mp4 anim-' + out + '/movie%d.jpg')
except:
pass
def calcSeismics(meshIn, vP):
meshSeis = meshIn.createH2()
#meshSeis = meshIn
meshSeis = appendTriangleBoundary(meshSeis,
xbound=25, ybound=22.0, marker=1,
quality=32.0, area=0.3, smooth=True,
markerBoundary=1,
isSubSurface=False, verbose=False)
print(meshSeis)
meshSeis = meshSeis.createH2()
meshSeis = meshSeis.createH2()
#meshSeis = meshSeis.createH2()
#meshSeis = meshSeis.createP2()
meshSeis.smooth(1, 1, 1, 4)
vP = pg.interpolate(meshIn, vP, meshSeis.cellCenters())
mesh = meshSeis
vP = pg.solver.fillEmptyToCellArray(mesh, vP)
print(mesh)
#ax, cbar = pg.show(mesh, data=vP)
#pg.show(mesh, axes=ax)
geophPointsX = np.arange(-19, 19.1, 1)
geophPoints = np.vstack((geophPointsX, np.zeros(len(geophPointsX)))).T
sourcePos=geophPoints[4]
c = mesh.findCell(sourcePos)
h1 = pg.findBoundary(c.boundaryNodes(0)).size()
h2 = pg.findBoundary(c.boundaryNodes(1)).size()
h3 = pg.findBoundary(c.boundaryNodes(2)).size()
print([h1, h2, h3])
h = pg.median([h1, h2, h3])
#h = pg.median(mesh.boundarySizes())
f0scale = 0.25
cfl = 0.5
dt = cfl * h /max(vP)
print("Courant-Friedrich-Lewy-Zahl:", cfl)
tmax = 40./min(vP)
times = np.arange(0.0, tmax, dt)
solutionName = createCacheName('seis', mesh, times) + "cfl-" + str(cfl)
try:
U = None
#u = pg.load(solutionName + '.bmat')
uI = pg.load(solutionName + 'I.bmat')
except Exception as e:
print(e)
f0 = f0scale * 1./dt
print("h:", round(h,2),
"dt:", round(dt,5),
"1/dt:", round(1/dt,1),
"f0", round(f0,2),
"Wavelength: ", round(max(vP)/f0, 2), " m")
uSource = ricker(times, f0, t0=1./f0)
plt.figure()
plt.plot(times, uSource, '-*')
plt.show(block=0)
plt.pause(0.01)
u = solvePressureWave(mesh, vP, times, sourcePos=sourcePos,
uSource=uSource, verbose=10)
u.save(solutionName)
uI = pg.RMatrix()
print("interpolate node to cell data ... ")
pg.interpolate(mesh, u, mesh.cellCenters(), uI)
print("... done")
uI.save(solutionName+'I')
#nodes = [mesh.findNearestNode(p) for p in geophPoints]
#fig = plt.figure()
#axs = fig.add_subplot(1,1,1)
#drawSeismogramm(axs, mesh, u, nodes, dt, i=None)
#plt.show()
dpi=92
scale=1
fig = plt.figure(facecolor='white',
figsize=(scale*800/dpi, scale*490/dpi), dpi=dpi)
ax = fig.add_subplot(1,1,1)
gci = pg.mplviewer.drawModel(ax, mesh, data=uI[0],
cMin=-1, cMax=1, cmap='bwr')
pg.mplviewer.drawMeshBoundaries(ax, meshIn, hideMesh=1)
ax.set_xlim((-20, 20))
ax.set_ylim((-15, 0))
ax.set_ylabel('Depth [m]')
ax.set_xlabel('$x$ [m]')
ticks = ax.yaxis.get_majorticklocs()
tickLabels = []
for t in ticks:
tickLabels.append(str(int(abs(t))))
ax.set_yticklabels(tickLabels)
plt.tight_layout()
#ax, cbar = pg.show(mesh, data=vP)
#pg.showNow()
#ax = fig.add_subplot(1,1,1)
def animate(i):
i=i*5
if i >len(uI)-1:
return
print("Frame:", i, "/", len(uI))
ui = uI[i]
ui = ui / max(pg.abs(ui))
ui = pg.logDropTol(ui, 1e-2)
cMax = max(pg.abs(ui))
pg.mplviewer.setMappableData(gci,
ui,
cMin=-cMax, cMax=cMax,
logScale=False
)
#plt.pause(0.001)
anim = animation.FuncAnimation(fig, animate,
frames=int(len(uI)/5),
interval=0.001, repeat=0)#, blit=True)
out = 'seis' + str(f0scale) + "cfl-" + str(cfl)
anim.save(out + ".mp4", writer=None, fps=20, dpi=dpi, codec=None,
bitrate=24*1024, extra_args=None, metadata=None,
extra_anim=None, savefig_kwargs=None)
try:
print("create frames ... ")
os.system('mkdir -p anim-' + out)
os.system('ffmpeg -i ' + out + '.mp4 anim-' + out + '/movie%d.jpg')
except:
pass
z = 2.
f0 = 1000.0 # A low wavelength of 50 Hz
velocities = pg.RVector(mesh.cellCount(), v1)
for c in mesh.cells():
velocities[c.id()] = v1
if c.center()[1] < -z:
velocities[c.id()] = v2
dt = h * 0.5/max(velocities)
times = np.arange(0.0, tmax, dt)
print(mesh, "h:", h, "dt:", dt, "n_t", len(times))
uSource = ricker(f0, times, t0=1./f0)
solutionName = 'uGridBig-'+ str(dt) + '-' + str(h)
nx = len(x)
ny = len(y)
dt = times[1] - times[0]
try:
print("load:", solutionName)
u = pg.load(solutionName + '.bmat')
except Exception as e:
print(e)
u = solvePressureWave(mesh, velocities, times, sourcePos=(0.0, 0.0),
uSource=uSource, verbose=10)
u.save(solutionName + '.bmat')
z = 2.
f0 = 1000.0 # A low wavelength of 50 Hz
velocities = pg.Vector(mesh.cellCount(), v1)
for c in mesh.cells():
velocities[c.id()] = v1
if c.center()[1] < -z:
velocities[c.id()] = v2
dt = h * 0.5 / max(velocities)
times = np.arange(0.0, tmax, dt)
print(mesh, "h:", h, "dt:", dt, "n_t", len(times))
uSource = ricker(f0, times, t0=1. / f0)
solutionName = 'uGridBig-' + str(dt) + '-' + str(h)
nx = len(x)
ny = len(y)
dt = times[1] - times[0]
try:
print("load:", solutionName)
u = pg.load(solutionName + '.bmat')
except Exception as e:
print(e)
u = solvePressureWave(mesh,
velocities,
times,
t1 = swatch.duration(True)
if verbose and (n % verbose == 0):
print(str(n) + "/" + str(len(times)), times[n], dt, t1, min(u[n]), max(u[n]))
plt.figure()
plt.plot(timeIter1, label="Ass:1")
plt.plot(timeIter2, label="Sol:1")
plt.plot(timeIter3, label="Ass:2")
plt.plot(timeIter4, label="Sol:2")
plt.legend()
plt.figure()
return u
if __name__ == "__main__":
from pygimli.physics.seismics import ricker, wiggle
import matplotlib.pyplot as plt
import numpy as np
t = np.arange(0, 0.02, 1.0 / 5000)
r = ricker(t, 100.0, 1.0 / 100)
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
wiggle(ax, r, t, xoffset=0, posColor="red", negColor="blue", alpha=0.2)
wiggle(ax, r, t, xoffset=1)
wiggle(ax, r, t, xoffset=2, posColor="black", negColor="white", alpha=1.0)
plt.show()