public MeshInitializer(KrakenModule krakenModule)
{
NSSPPts = Enumerable.Repeat(0, krakenModule.MaxMedium + 1).ToList();
z = Enumerable.Repeat(0d, maxSSP + 1).ToList();
if (krakenModule.BCTop[0] == 'S')
{
cpSpline = new List <List <Complex> >(4 + 1);
for (var i = 0; i < 5; i++)
{
cpSpline.Add(Enumerable.Repeat(new Complex(), maxSSP + 1).ToList());
}
csSpline = new List <List <Complex> >(4 + 1);
for (var i = 0; i < 5; i++)
{
csSpline.Add(Enumerable.Repeat(new Complex(), maxSSP + 1).ToList());
}
rhoSpline = new List <List <Complex> >(4 + 1);
for (var i = 0; i < 5; i++)
{
rhoSpline.Add(Enumerable.Repeat(new Complex(), maxSSP + 1).ToList());
}
}
else
{
alpha = Enumerable.Repeat(new Complex(), maxSSP + 1).ToList();
beta = Enumerable.Repeat(new Complex(), maxSSP + 1).ToList();
rho = Enumerable.Repeat(0d, maxSSP + 1).ToList();
}
}
public void EvaluateSSP(KrakenModule krakenModule, List <double> depth, List <Complex> cP, List <Complex> cS, List <double> RhoTop,
int medium, ref int n1, int offset, double Frequency, string SSPType, string attenUnit, string task, List <List <double> > ssp)
{
switch (SSPType)
{
case "N":
N2Linear(krakenModule, depth, cP, cS, RhoTop, medium, ref n1, offset, Frequency, attenUnit, task, ssp);
break;
case "C":
CLinear(krakenModule, depth, cP, cS, RhoTop, medium, ref n1, offset, Frequency, attenUnit, task, ssp);
break;
case "S":
CubicSpline(krakenModule, depth, cP, cS, RhoTop, medium, ref n1, offset, Frequency, attenUnit, task, ssp);
break;
default:
throw new KrakenException("Unknown profile option (SSPType)");
}
}
public void ComputeBoundaryConditionImpedance(KrakenModule krakenModule, double x, string BCType, string botTop, Complex cPHS, Complex cSHS,
double rhoHS, ref double f, ref double g, ref int iPow)
{
iPow = 0;
var yV = Enumerable.Repeat(0d, 5 + 1).ToList();
if (BCType[0] == 'V' || BCType[0] == 'S' ||
BCType[0] == 'H' || BCType[0] == 'T' ||
BCType[0] == 'I')
{
f = 1.0;
g = 0.0;
yV[1] = f;
yV[2] = g;
yV[3] = 0.0;
yV[4] = 0.0;
yV[5] = 0.0;
}
if (BCType[0] == 'R')
{
f = 0.0;
g = 1.0;
yV[1] = f;
yV[2] = g;
yV[3] = 0.0;
yV[4] = 0.0;
yV[5] = 0.0;
}
if (BCType[0] == 'A')
{
Complex gammaS2, gammaP2, gammaS, gammaP;
double mu;
if (cSHS.Real > 0)
{
gammaS2 = x - krakenModule.Omega2 / Math.Pow(cSHS.Real, 2);
gammaP2 = x - krakenModule.Omega2 / Math.Pow(cPHS.Real, 2);
gammaS = Complex.Sqrt(gammaS2);
gammaP = Complex.Sqrt(gammaP2);
mu = rhoHS * Math.Pow(cSHS.Real, 2);
yV[1] = ((gammaS * gammaP - x) / mu).Real;
yV[2] = ((Complex.Pow((gammaS2 + x), 2) - 4.0 * gammaS * gammaP * x) * mu).Real;
yV[3] = (2.0 * gammaS * gammaP - gammaS2 - x).Real;
yV[4] = (gammaP * (x - gammaS2)).Real;
yV[5] = (gammaS * (gammaS2 - x)).Real;
f = krakenModule.Omega2 * yV[4];
g = yV[2];
if (g > 0)
{
krakenModule.ModeCount++;
}
}
else
{
gammaP = Complex.Sqrt(x - krakenModule.Omega2 / Complex.Pow(cPHS, 2));
f = gammaP.Real;
g = rhoHS;
}
}
if (botTop == "TOP")
{
g = -g;
}
if (botTop == "TOP")
{
if (krakenModule.FirstAcoustic > 1)
{
for (var medium = 1; medium <= krakenModule.FirstAcoustic - 1; medium++)
{
ElasticDown(krakenModule, x, yV, ref iPow, medium);
}
f = krakenModule.Omega2 * yV[4];
g = yV[2];
}
}
else
{
if (krakenModule.LastAcoustic < krakenModule.NMedia)
{
for (var medium = krakenModule.NMedia; medium >= krakenModule.LastAcoustic + 1; medium--)
{
ElasticUp(krakenModule, x, yV, ref iPow, medium);
}
f = krakenModule.Omega2 * yV[4];
g = yV[2];
}
}
}
private void ElasticDown(KrakenModule krakenModule, double x, List <double> yV, ref int iPow, int medium)
{
var xV = Enumerable.Repeat(0d, 5 + 1).ToList();
var zV = Enumerable.Repeat(0d, 5 + 1).ToList();
double roof = Math.Pow(10, 50);
double floor = Math.Pow(10, -50);
int iPowR = 50;
int iPowF = -50;
double twoX, twoH, fourHX, xB3;
int j;
twoX = 2.0 * x;
twoH = 2.0 * krakenModule.H[medium];
fourHX = 4.0 * krakenModule.H[medium] * x;
j = krakenModule.Loc[medium] + 1;
xB3 = x * krakenModule.B3[j] - krakenModule.Rho[j];
zV[1] = yV[1] + 0.5 * (krakenModule.B1[j] * yV[4] - krakenModule.B2[j] * yV[5]);
zV[2] = yV[2] + 0.5 * (-krakenModule.Rho[j] * yV[4] - xB3 * yV[5]);
zV[3] = yV[3] + 0.5 * (twoH * yV[4] + krakenModule.B4[j] * yV[5]);
zV[4] = yV[4] + 0.5 * (xB3 * yV[1] + krakenModule.B2[j] * yV[2] - twoX * krakenModule.B4[j] * yV[3]);
zV[5] = yV[5] + 0.5 * (krakenModule.Rho[j] * yV[1] - krakenModule.B1[j] * yV[2] - fourHX * yV[3]);
for (var II = 1; II <= krakenModule.N[medium]; II++)
{
j += 1;
for (var i = 0; i < yV.Count; i++)
{
xV[i] = yV[i];
}
for (var i = 0; i < zV.Count; i++)
{
yV[i] = zV[i];
}
xB3 = x * krakenModule.B3[j] - krakenModule.Rho[j];
zV[1] = xV[1] + (krakenModule.B1[j] * yV[4] - krakenModule.B2[j] * yV[5]);
zV[2] = xV[2] + (-krakenModule.Rho[j] * yV[4] - xB3 * yV[5]);
zV[3] = xV[3] + (twoH * yV[4] + krakenModule.B4[j] * yV[5]);
zV[4] = xV[4] + (xB3 * yV[1] + krakenModule.B2[j] * yV[2] - twoX * krakenModule.B4[j] * yV[3]);
zV[5] = xV[5] + (krakenModule.Rho[j] * yV[1] - krakenModule.B1[j] * yV[2] - fourHX * yV[3]);
if (II != krakenModule.N[medium])
{
if (Math.Abs(zV[2]) < floor)
{
for (var i = 0; i < zV.Count; i++)
{
yV[i] *= roof;
zV[i] *= roof;
}
iPow -= iPowR;
}
if (Math.Abs(zV[2]) > roof)
{
for (var i = 0; i < zV.Count; i++)
{
yV[i] *= floor;
zV[i] *= floor;
}
iPow -= iPowF;
}
}
}
for (var i = 1; i < yV.Count; i++)
{
yV[i] = (xV[i] + 2 * yV[i] + zV[i]) / 4.0;
}
}
public void ProccedMesh(KrakenModule krakenModule, List <List <double> > ssp,
List <double> tahsp, List <double> tsp, List <double> bahsp)
{
string SSPType = krakenModule.BCTop[0].ToString();
string BCType = krakenModule.BCTop[1].ToString();
string attenUnit = krakenModule.BCTop[2].ToString();
if (krakenModule.BCTop.Length > 3)
{
attenUnit += krakenModule.BCTop[3].ToString();
}
alphaR = 1500.0;
betaR = 0.0;
rhoR = 0.0;
alphaI = 0.0;
betaI = 0.0;
var NElts = 0;
var rho = new List <double>()
{
0, 0
};
if (BCType == "A")
{
alphaR = tahsp[2];
betaR = tahsp[3];
rhoR = tahsp[4];
alphaI = tahsp[5];
betaI = tahsp[6];
if (alphaR == 0 || rhoR == 0)
{
throw new KrakenException("Sound speed or density vanishes in halfspace");
}
krakenModule.CPTop = ConvertToSingleComplexWaveSpeed(alphaR, alphaI, krakenModule.Frequency, attenUnit);
krakenModule.CSTop = ConvertToSingleComplexWaveSpeed(betaR, betaI, krakenModule.Frequency, attenUnit);
krakenModule.RhoTop = rhoR;
}
if (BCType == "S" || BCType == "H" || BCType == "T" || BCType == "I")
{
krakenModule.BumpDensity = tsp[1];
krakenModule.Eta = tsp[2];
krakenModule.Xi = tsp[3];
}
var cP = new List <Complex>(maxSSP + 1);
var cS = new List <Complex>(maxSSP + 1);
for (var medium = 1; medium <= krakenModule.NMedia; medium++)
{
if ((25 * krakenModule.Frequency / 1500) * Math.Pow(krakenModule.Sigma[medium], 2) > 1)
{
krakenModule.Warnings.Add("The Rayleigh roughness parameter might exceed the region of validity for the scatter approximation");
}
var task = "INIT";
EvaluateSSP(krakenModule, krakenModule.Depth, cP, cS, rho, medium, ref NElts, 0, krakenModule.Frequency, SSPType,
attenUnit, task, ssp);
var c = alphaR;
if (betaR > 0)
{
c = betaR;
}
var deltaZ = c / krakenModule.Frequency / 20;
var nNeeded = (int)(krakenModule.Depth[medium + 1] - krakenModule.Depth[medium]) / deltaZ;
nNeeded = Math.Max(nNeeded, 10);
if (krakenModule.NG[medium] == 0)
{
krakenModule.NG[medium] = (int)nNeeded;
}
else if (krakenModule.NG[medium] < nNeeded / 2)
{
throw new KrakenException("Mesh is too coarse");
}
}
BCType = krakenModule.BCBottom[0].ToString();
if (BCType == "A")
{
alphaR = bahsp[2];
betaR = bahsp[3];
rhoR = bahsp[4];
alphaI = bahsp[5];
betaI = bahsp[6];
if (alphaR == 0 || rhoR == 0)
{
throw new KrakenException("Sound speed or density vanishes in halfspace");
}
krakenModule.CPBottom = ConvertToSingleComplexWaveSpeed(alphaR, alphaI, krakenModule.Frequency, attenUnit);
krakenModule.CSBottom = ConvertToSingleComplexWaveSpeed(betaR, betaI, krakenModule.Frequency, attenUnit);
krakenModule.RhoBottom = rhoR;
}
}
private void CubicSpline(KrakenModule krakenModule, List <double> depth, List <Complex> cP, List <Complex> cS, List <double> RhoTop, int medium,
ref int n1, int offset, double Frequency, string attenUnit, string task, List <List <double> > ssp)
{
int ILoc;
if (task.Contains("INIT"))
{
NSSPPts[medium] = n1;
if (medium == 1)
{
krakenModule.Loc[medium] = 0;
}
else
{
krakenModule.Loc[medium] = krakenModule.Loc[medium - 1] + NSSPPts[medium - 1];
}
ILoc = krakenModule.Loc[medium];
n1 = 1;
for (var i = 1; i <= maxSSP; i++)
{
try
{
int ind = ILoc + i;
z[ind] = ssp[ind][1];
alphaR = ssp[ind][2];
betaR = ssp[ind][3];
rhoR = ssp[ind][4];
alphaI = ssp[ind][5];
betaI = ssp[ind][6];
cpSpline[1][ILoc + i] = ConvertToSingleComplexWaveSpeed(alphaR, alphaI, Frequency, attenUnit);
csSpline[1][ILoc + i] = ConvertToSingleComplexWaveSpeed(betaR, betaI, Frequency, attenUnit);
rhoSpline[1][ILoc + i] = rhoR;
}
catch (ArgumentOutOfRangeException)
{
throw new KrakenException("The SSP reading error. Check the medium info and the SSP values");
}
if (Math.Abs(z[ILoc + i] - depth[medium + 1]) < 0.0000001 * depth[medium + 1])
{
NSSPPts[medium] = n1;
if (medium == 1)
{
depth[1] = z[1];
}
if (NSSPPts[medium] == 1)
{
throw new KrakenException("The SSP must have at least 2 points in each layer");
}
var IBCBEG = 0;
var IBCEND = 0;
var splineC = new SplineCalculator();
splineC.CalculateCubicSpline(z, cpSpline, ILoc, NSSPPts[medium], IBCBEG, IBCEND);
splineC.CalculateCubicSpline(z, csSpline, ILoc, NSSPPts[medium], IBCBEG, IBCEND);
splineC.CalculateCubicSpline(z, rhoSpline, ILoc, NSSPPts[medium], IBCBEG, IBCEND);
return;
}
n1++;
}
throw new KrakenException("Number of SSP points exceeds limit");
}
else
{
ILoc = NSSPPts[medium - 1];
var N = n1 - 1;
var h = (z[ILoc + NSSPPts[medium]] - z[ILoc + 1]) / N;
var Lay = 1;
for (var i = offset; i <= n1 + offset - 1; i++)
{
double zT = z[ILoc + 1] + (i - offset) * h;
if (i == n1 + offset)
{
zT = z[ILoc + NSSPPts[medium]];
}
while (zT > z[ILoc + Lay + 1])
{
Lay += 1;
}
var splineCalculator = new SplineCalculator();
var hSpline = zT - z[ILoc + Lay];
cP[i] = splineCalculator.CalculateExponentialSpline(cpSpline, ILoc + Lay, hSpline);
cS[i] = splineCalculator.CalculateExponentialSpline(csSpline, ILoc + Lay, hSpline);
RhoTop[i] = splineCalculator.CalculateExponentialSpline(rhoSpline, ILoc + Lay, hSpline).Real;
}
}
}
private void CLinear(KrakenModule krakenModule, List <double> depth, List <Complex> cP, List <Complex> cS, List <double> RhoTop, int medium, ref int n1,
int offset, double Frequency, string attenUnit, string task, List <List <double> > ssp)
{
int ILoc;
if (task.Contains("INIT"))
{
NSSPPts[medium] = n1;
if (medium == 1)
{
krakenModule.Loc[medium] = 0;
}
else
{
krakenModule.Loc[medium] = krakenModule.Loc[medium - 1] + NSSPPts[medium - 1];
}
ILoc = krakenModule.Loc[medium];
n1 = 1;
for (var i = 1; i <= maxSSP; i++)
{
try
{
int ind = ILoc + i;
z[ind] = ssp[ind][1];
alphaR = ssp[ind][2];
betaR = ssp[ind][3];
rhoR = ssp[ind][4];
alphaI = ssp[ind][5];
betaI = ssp[ind][6];
}
catch (ArgumentOutOfRangeException)
{
throw new KrakenException("SSP reading error. Check medium info and SSP values");
}
alpha[ILoc + i] = ConvertToSingleComplexWaveSpeed(alphaR, alphaI, Frequency, attenUnit);
beta[ILoc + i] = ConvertToSingleComplexWaveSpeed(betaR, betaI, Frequency, attenUnit);
rho[ILoc + i] = rhoR;
if (Math.Abs(z[ILoc + i] - depth[medium + 1]) < 0.0000001 * depth[medium + 1])
{
NSSPPts[medium] = n1;
if (medium == 1)
{
depth[1] = z[1];
}
if (NSSPPts[medium] == 1)
{
throw new KrakenException("The SSP must have at least 2 points in each layer");
}
return;
}
n1++;
}
throw new KrakenException("Number of SSP points exceeds limit");
}
else
{
ILoc = NSSPPts[medium - 1];
var N = n1 - 1;
var h = (z[ILoc + NSSPPts[medium]] - z[ILoc + 1]) / N;
var Lay = 1;
for (var i = offset; i <= n1 + offset - 1; i++)
{
double zT = z[ILoc + 1] + (i - offset) * h;
if (i == n1 + offset)
{
zT = z[ILoc + NSSPPts[medium]];
}
while (zT > z[ILoc + Lay + 1])
{
Lay += 1;
}
var r = (zT - z[ILoc + Lay]) / (z[ILoc + Lay + 1] - z[ILoc + Lay]);
cP[i] = (1.0 - r) * alpha[ILoc + Lay] + r * alpha[ILoc + Lay + 1];
cS[i] = (1.0 - r) * beta[ILoc + Lay] + r * beta[ILoc + Lay + 1];
RhoTop[i] = (1.0 - r) * rho[ILoc + Lay] + r * rho[ILoc + Lay + 1];
}
}
}