public FlowSoundParameters GetFlowSoundParameters(double Thrust, FlowParameters flowParameters) // см. метод с аналогичной сигнатурой в IModel
{
double OverExpandedDiameter = 2 * 1 / flowParameters.NozzleMachNumber * Math.Sqrt(
flowParameters.MassFlow * flowParameters.NozzleFlowVelocity /
(Math.PI * 1.0125E5 * flowParameters.NozzleAdiabaticIndex));
double UndisturbedSupersonicFlowLength = 1.75 * OverExpandedDiameter *
Math.Pow(1 + 0.38 * flowParameters.NozzleMachNumber, 2);
double SupersonicFlowLength = OverExpandedDiameter *
(5 * Math.Pow(flowParameters.NozzleMachNumber, 1.8) + 0.8);
double DistanceToPointdOfMaximalSoundLevel = 1.5 * UndisturbedSupersonicFlowLength;
double _98ProzentSoundPowerRadiatingFlowLength = 5 * UndisturbedSupersonicFlowLength;
double DistanceToPointOfFlowDestruction = 8.38 * UndisturbedSupersonicFlowLength;
double MechanicalPower = 0.5 * Thrust * flowParameters.NozzleFlowVelocity;
double SoundPowerRatio = 0.22;
double SoundPower = MechanicalPower * SoundPowerRatio / 100;
double SoundMaximalPowerConeHalfAngle = 30;
return(new FlowSoundParameters(
MechanicalPower,
SoundPower,
SoundPowerRatio,
SoundMaximalPowerConeHalfAngle,
UndisturbedSupersonicFlowLength,
DistanceToPointdOfMaximalSoundLevel,
SupersonicFlowLength,
_98ProzentSoundPowerRadiatingFlowLength,
DistanceToPointOfFlowDestruction));
}
public ApplyEngineParametersEventArgs(
double Thrust,
FlowParameters FlowParameters)
{
this.Thrust = Thrust;
this.FlowParameters = FlowParameters;
}
public void OpenEngineNoiseInputData(
string FileName,
out double Thrust,
out FlowParameters FlowParameters,
out EngineSoundContourParameters ContourParameters)
{
engineNoiseModel.Open(FileName, out Thrust, out FlowParameters, out ContourParameters);
}
public EngineSoundLevel GetEngineSoundLevel(double Thrust, FlowParameters FlowParameters) // см. метод с аналогичной сигнатурой в IModel
{
var EngineSoundLevelAtFrequency = GetEngineSoundLevelAtFrequency(Thrust, FlowParameters);
return((Radius, Angle) => 10 * Math.Log10(EngineSoundLevelAtFrequency(Radius, Angle)
.Select(x => Math.Pow(10, 0.1 * x.Value))
.Sum()));
}
private void AddFlowParameters(Dictionary <string, string> flowParameters)
{
foreach (var parameter in flowParameters)
{
var flowParameter = new FlowParameter(Id, parameter.Key, parameter.Value);
FlowParameters.Add(flowParameter);
}
}
public void OpenEngineNoiseInputData(
XmlDocument xmlDoc,
out double Thrust,
out FlowParameters FlowParameters,
out EngineSoundContourParameters ContourParameters)
{
engineNoiseModel.Open(xmlDoc, out Thrust, out FlowParameters, out ContourParameters);
}
public void SaveEngineNoiseInputData(
string FileName,
double Thrust,
FlowParameters FlowParameters,
EngineSoundContourParameters ContourParameters)
{
engineNoiseModel.Save(FileName, Thrust, FlowParameters, ContourParameters);
}
public ApplyFlightNoisePartialInputDataEventArgs(
Part Part,
Ballistics Ballistics,
FlowParameters FlowParameters)
{
this.Part = Part;
this.Ballistics = Ballistics;
this.FlowParameters = FlowParameters;
}
public void Open(
string FileName,
out double Thrust,
out FlowParameters FlowParameters,
out EngineSoundContourParameters ContourParameters) // см. метод с аналогичной сигнатурой в IModel
{
var xmlDoc = new XmlDocument();
xmlDoc.Load(FileName);
Open(FileName, out Thrust, out FlowParameters, out ContourParameters);
}
} // Спектр частот
public FireTestNoiseCalculationInputData(
double Thrust,
FlowParameters FlowParameters,
List <WeatherParameters> WeatherParameters,
RadiusInterval RadiusInterval,
FrequencyBand FrequencyBand) : this()
{
this.Thrust = Thrust;
this.FlowParameters = FlowParameters;
this.WeatherParameters = WeatherParameters;
this.RadiusInterval = RadiusInterval;
this.FrequencyBand = FrequencyBand;
}
} // Погодные условия
public FlightSoundCalculationInputData(
RocketBallistics RocketBallistics,
VehicleBallistics VehicleBallistics,
FlowParameters RocketFlowParameters,
FlowParameters VehicleFlowParameters,
List <WeatherParameters> WeatherParameters) : this()
{
this.RocketBallistics = RocketBallistics;
this.VehicleBallistics = VehicleBallistics;
this.RocketFlowParameters = RocketFlowParameters;
this.VehicleFlowParameters = VehicleFlowParameters;
this.WeatherParameters = WeatherParameters;
}
public void Open(
XmlDocument xmlDoc,
out double Thrust,
out FlowParameters FlowParameters,
out EngineSoundContourParameters ContourParameters) // см. метод с аналогичной сигнатурой в IModel
{
Func <XmlNode, double> GetThrust = Node => Convert.ToDouble(Node.InnerText);
Func <XmlNode, FlowParameters> GetFlowParameters = Node => new FlowParameters(
Convert.ToDouble(Node.Attributes["MassFlow"].Value),
Convert.ToDouble(Node.Attributes["NozzleDiameter"].Value),
Convert.ToDouble(Node.Attributes["NozzleMachNumber"].Value),
Convert.ToDouble(Node.Attributes["NozzleFlowVelocity"].Value),
Convert.ToDouble(Node.Attributes["ChamberSoundVelocity"].Value),
Convert.ToDouble(Node.Attributes["NozzleAdiabaticIndex"].Value));
Func <XmlNode, List <WeatherParameters> > GetWeatherParameters = Node => Node.ChildNodes.Cast <XmlNode>().Select(x => new WeatherParameters(
x.Name,
Convert.ToDouble(x.Attributes["Humidity"].Value),
Convert.ToDouble(x.Attributes["Temperature"].Value))).ToList();
Func <XmlNode, Dictionary <double, Color> > GetSoundLevels = Node =>
{
if (Node == null)
{
return(null);
}
return(Node.ChildNodes.Cast <XmlNode>()
.Select(x => new
{
SoundLevel = Convert.ToDouble(x.InnerText),
Color = Color.FromArgb(
Convert.ToInt32(x.Attributes["A"].Value),
Convert.ToInt32(x.Attributes["R"].Value),
Convert.ToInt32(x.Attributes["G"].Value),
Convert.ToInt32(x.Attributes["B"].Value))
})
.ToDictionary(x => x.SoundLevel, x => x.Color));
};
var Root = xmlDoc.ChildNodes[0];
Func <XmlNode, string, XmlNode> FindNode = (Node, ChildNodeName) => Node.ChildNodes.Cast <XmlNode>().FirstOrDefault(x => x.Name == ChildNodeName);
Thrust = GetThrust(FindNode(Root, "Thrust"));
FlowParameters = GetFlowParameters(FindNode(Root, "FlowParameters"));
var contourParanetersNode = FindNode(Root, "ContourParaneters");
ContourParameters = new EngineSoundContourParameters(
Convert.ToInt32(contourParanetersNode.Attributes["Width"].Value),
Convert.ToInt32(contourParanetersNode.Attributes["Height"].Value),
Convert.ToInt32(contourParanetersNode.Attributes["NozzleCoordinate"].Value),
Convert.ToInt32(contourParanetersNode.Attributes["MinSoundLevel"].Value),
Convert.ToInt32(contourParanetersNode.Attributes["MaxSoundLevel"].Value));
}
public StaticSoundLevel GetStaticSoundLevel(double Thrust, FlowParameters flowParameters, FrequencyBand frequencyBand) // см. метод с аналогичной сигнатурой в IModel
{
double[] Frequencies, FrequencyBands; // массив среднегеометрических частот и ширин частотных полос
// определение массивов Frequencies, FrequencyBands по исходному спектру частот frequencyBand
if (frequencyBand == FrequencyBand.Infra)
{
FrequenciesAggregator.Infra(out Frequencies, out FrequencyBands);
}
else if (frequencyBand == FrequencyBand.Ultra)
{
FrequenciesAggregator.Ultra(out Frequencies, out FrequencyBands);
}
else
{
FrequenciesAggregator.Normal(out Frequencies, out FrequencyBands);
}
double[] spectralDecomposition = SpectralDecomposition.Get(1.01325E5, flowParameters, Frequencies, FrequencyBands); // Разложение шума на спектр по частотам
// Определение функции, возвращающей уровень шума от двиагтеля на расстоянии Radius от сопла под углом Angle к напрвлению оси газовой струи при погодных условиях weatherParameters
return((Radius, Angle, weatherParameters) =>
{
double[] atmospherePropagation = new double[Frequencies.Length]; // массив затуханий звука на частотах Frequencies на расстоянии Radius при погодных условиях weatherParameters
var atmosphereParameters = new AtmosphereParameters(weatherParameters.Temperature, 1.01325E5); // создание объекта, хранящего атмосферные параметры
for (int j = 0; j < Frequencies.Length; j++)
{
atmospherePropagation[j] = Atmosphere.AbsorptionRatio(weatherParameters.Humidity, atmosphereParameters, Frequencies[j]) * Radius; // заполнение массива atmospherePropagation
}
double L0 = 10 * Math.Log10(0.5 * 0.0022 * Thrust * flowParameters.NozzleFlowVelocity) + 120 - 11 - 20 * Math.Log10(Radius) + DI.Interpolate(Angle * 180 / Math.PI); // Уровень шума в искомой точке без учёта корреляции по шкале A и затухания звука
double L = 0; // Уровень шума в искомой точке с учётом корреляции по шкале A и затухания звука
for (int i = 0; i < Frequencies.Length; i++)
{
double correction = frequencyBand == FrequencyBand.Normal ? Correction.Get(i) : 0; // корреляции по шкале Aв случае расчёта в слышимом диапазоне частот
double CurrentL = L0 + spectralDecomposition[i] - atmospherePropagation[i] + correction; // Уровень шума в искомой точке на частоте Frequencies[i] с учётом корреляции по шкале A и затуханием звука
if (CurrentL > 0)
{
L += Math.Pow(10, 0.1 * CurrentL); // логарифмическое суммиррование уровней шума на частотах Frequencies[i]
}
}
if (L > 0)
{
return 10 * Math.Log10(L);
}
else
{
return 0;
}
});
}
public SaveFireTestNoiseInputDataEventArgs(
string FileName,
double Thrust,
FlowParameters FlowParameters,
List <WeatherParameters> WeatherParameters,
Dictionary <double, Color> SoundLevels,
RadiusInterval RadiusInterval,
FrequencyBand FrequencyBand)
{
this.FileName = FileName;
this.Thrust = Thrust;
this.FlowParameters = FlowParameters;
this.WeatherParameters = WeatherParameters;
this.SoundLevels = SoundLevels;
this.RadiusInterval = RadiusInterval;
this.FrequencyBand = FrequencyBand;
}
public SaveEngineNoiseInputDataEventArgs(
string FileName,
double Thrust,
FlowParameters FlowParameters,
double ContourAreaWidth,
double ContourAreaHeight,
double NozzleCoordinate,
double MinSoundLevel,
double MaxSoundLevel)
{
this.FileName = FileName;
this.Thrust = Thrust;
this.FlowParameters = FlowParameters;
this.ContourAreaWidth = ContourAreaWidth;
this.ContourAreaHeight = ContourAreaHeight;
this.NozzleCoordinate = NozzleCoordinate;
this.MinSoundLevel = MinSoundLevel;
this.MaxSoundLevel = MaxSoundLevel;
}
public SaveFlightNoiseInputDataEventArgs(
string FileName,
RocketBallistics RocketBallistics,
VehicleBallistics VehicleBallistics,
FlowParameters RocketFlowParameters,
FlowParameters VehicleFlowParameters,
List <WeatherParameters> WeatherParameters,
Dictionary <double, Color> SoundLevels,
RadiusInterval RadiusInterval,
FrequencyBand FrequencyBand)
{
this.FileName = FileName;
this.RocketBallistics = RocketBallistics;
this.VehicleBallistics = VehicleBallistics;
this.RocketFlowParameters = RocketFlowParameters;
this.VehicleFlowParameters = VehicleFlowParameters;
this.WeatherParameters = WeatherParameters;
this.SoundLevels = SoundLevels;
this.RadiusInterval = RadiusInterval;
this.FrequencyBand = FrequencyBand;
}
public void Save(
string FileName,
double Thrust,
FlowParameters FlowParameters,
EngineSoundContourParameters ContourParameters) // см. метод с аналогичной сигнатурой в IModel
{
var xmlDoc = new XmlDocument();
var Root = xmlDoc.CreateElement("EngineNoiseInputData");
Action <XmlNode, string, double> AddAttribute = (node, name, value) =>
{
var attribute = xmlDoc.CreateAttribute(name);
attribute.Value = value.ToString();
node.Attributes.Append(attribute);
};
var thrustNode = xmlDoc.CreateElement("Thrust");
thrustNode.InnerText = Thrust.ToString();
Root.AppendChild(thrustNode);
var flowParametersNode = xmlDoc.CreateElement("FlowParameters");
AddAttribute(flowParametersNode, "MassFlow", FlowParameters.MassFlow);
AddAttribute(flowParametersNode, "NozzleDiameter", FlowParameters.NozzleDiameter);
AddAttribute(flowParametersNode, "NozzleMachNumber", FlowParameters.NozzleMachNumber);
AddAttribute(flowParametersNode, "NozzleFlowVelocity", FlowParameters.NozzleFlowVelocity);
AddAttribute(flowParametersNode, "ChamberSoundVelocity", FlowParameters.ChamberSoundVelocity);
AddAttribute(flowParametersNode, "NozzleAdiabaticIndex", FlowParameters.NozzleAdiabaticIndex);
Root.AppendChild(flowParametersNode);
var contourParanetersNode = xmlDoc.CreateElement("ContourParaneters");
AddAttribute(contourParanetersNode, "Width", ContourParameters.ContourAreaWidth);
AddAttribute(contourParanetersNode, "Height", ContourParameters.ContourAreaHeight);
AddAttribute(contourParanetersNode, "NozzleCoordinate", ContourParameters.NozzleCoordinate);
AddAttribute(contourParanetersNode, "MinSoundLevel", ContourParameters.MinSoundLevel);
AddAttribute(contourParanetersNode, "MaxSoundLevel", ContourParameters.MaxSoundLevel);
Root.AppendChild(contourParanetersNode);
xmlDoc.AppendChild(Root);
xmlDoc.Save(FileName);
}
public void Calculate(
double Thrust,
FlowParameters FlowParameters,
out EngineAcousticsLoadSummary summary) // см. метод с аналогичной сигнатурой в IModel
{
var FlowSoundParameters = GetFlowSoundParameters(Thrust, FlowParameters);
var EngineSoundLevelAtFrequency = GetEngineSoundLevelAtFrequency(Thrust, FlowParameters);
var engineSoundLevel = GetEngineSoundLevel(Thrust, FlowParameters);
var FrequencyCharacteristik = EngineSoundLevelAtFrequency(1, Math.PI / 2);
var Angles = new List <double>();
for (int i = 0; i <= 180; i += 10)
{
Angles.Add(i);
}
var RadiationPattern = Angles
.Select(x => new { Angle = x, SoundLevel = engineSoundLevel(1, x * Math.PI / 180) })
.ToDictionary(x => x.Angle, x => x.SoundLevel);
var EngineAcousticsLoadAtFrequency = EngineSoundLevelAtFrequency(FlowSoundParameters.DistanceToPointOfMaximalSoundLevel, Math.PI);
var EngineAcousticsLoadSummary = engineSoundLevel(FlowSoundParameters.DistanceToPointOfMaximalSoundLevel, Math.PI);
summary = new EngineAcousticsLoadSummary(FlowSoundParameters, FrequencyCharacteristik, RadiationPattern, EngineAcousticsLoadAtFrequency, EngineAcousticsLoadSummary);
}
public static double[] Get // Функция, возвращающая разложение шума на спектр по частотам
(
double Pressure, // Давлению на какой-либо высоте
FlowParameters flowParameters, // Параметры газовой струи
double[] Frequencies, // Среднегеометрические частоты
double[] FrequencyBands // Ширины частотных полос
)
{
double CoreLength = 1.75 * 2 * 1 / flowParameters.NozzleMachNumber * Math.Sqrt(flowParameters.MassFlow * flowParameters.NozzleFlowVelocity /
(Math.PI * Pressure * flowParameters.NozzleAdiabaticIndex)) * Math.Pow(1 + 0.38 * flowParameters.NozzleMachNumber, 2); // Длина невозмущённого сверхзвукового потока
double JetLength = 5 * CoreLength; // Расстояние от выходного сечения сопла до конца участка газовой струи, излучаю-щего ~98% звуковой мощности
int StepCount = 15; // Количество участков разбиения газовой струи
double Step = JetLength / StepCount; // Шаг разбиения газовой струи
double[] Sh = new double[StepCount]; // Массив чисел Струхаля участков газовой струи
double[] x = new double[StepCount]; // Массив координат участков газовой струи
double[] NSP = new double[Frequencies.Length]; // Частотный спектр шума
double NozzleSoundVelocity = flowParameters.NozzleFlowVelocity / flowParameters.NozzleMachNumber; // Скорость звука на срезе сопла
for (int j = 1; j <= StepCount; j++) // Заполнение массивов координат и чисел Струхаля участков газовой струи
{
x[j - 1] = j * Step;
Sh[j - 1] = x[j - 1] * NozzleSoundVelocity / (flowParameters.NozzleFlowVelocity * flowParameters.ChamberSoundVelocity);
}
for (int i = 0; i < Frequencies.Length; i++) // Определение частотного спектра шума
{
double CurrentNSP = 0; // Переменная-заготовка для элемента частотного спектра, соответсвующего частоте Frequencies[i]
for (int j = 0; j < StepCount; j++) // Логарифмическое суммирование уровней шума от участков газовой струи на частоте Frequencies[i]
{
CurrentNSP += Math.Pow(10, 0.1 * (NRSP.Interpolate(Frequencies[i] * Sh[j]) + 10 * Math.Log10(FrequencyBands[i] * Sh[j]) +
NRSPL.Interpolate(x[j] / CoreLength) + 10 * Math.Log10(Step / CoreLength)));
}
NSP[i] = 10 * Math.Log10(CurrentNSP); // Определение элемента частотного спектра, соответсвующего частоте Frequencies[i]
}
return(NSP);
}
public void CalculateEngineAcousticsLoadSummary(double Thrust, FlowParameters FlowParameters, out EngineAcousticsLoadSummary summary)
{
engineNoiseModel.Calculate(Thrust, FlowParameters, out summary);
}
public FlightSoundLevel GetFlightSoundLevel(Ballistics ballistics, FlowParameters flowParameters, FrequencyBand frequencyBand)
{
return(flightNoiseModel.GetFlightSoundLevel(ballistics, flowParameters, frequencyBand));
}
public void Calculate(
double Thrust,
FlowParameters FlowParameters,
EngineSoundContourParameters ContourParameters,
out EngineSoundContour EngineSoundContour) // см. метод с аналогичной сигнатурой в IModel
{
var FlowSoundParameters = GetFlowSoundParameters(Thrust, FlowParameters);
var EngineSoundLevel = GetEngineSoundLevel(Thrust, FlowParameters);
int Nx, Ny, W, H;
if (ContourParameters.ContourAreaWidth >= ContourParameters.ContourAreaHeight)
{
Ny = 51;
H = 1000;
Nx = (int)(Ny * ContourParameters.ContourAreaWidth / ContourParameters.ContourAreaHeight);
W = (int)(H * ContourParameters.ContourAreaWidth / ContourParameters.ContourAreaHeight);
}
else
{
Nx = 51;
W = 1000;
Ny = (int)(Nx * ContourParameters.ContourAreaHeight / ContourParameters.ContourAreaWidth);
H = (int)(W * ContourParameters.ContourAreaHeight / ContourParameters.ContourAreaWidth);
}
var X = new double[Nx];
var Y = new double[Ny];
double dX = ContourParameters.ContourAreaWidth / (Nx - 1);
double dY = ContourParameters.ContourAreaHeight / (Ny - 1);
for (int i = 0; i < Nx; i++)
{
X[i] = i * dX;
}
for (int i = 0; i < Ny; i++)
{
Y[i] = i * dY;
}
var SoundLevels = new double[Nx, Ny];
for (int i = 0; i < Nx; i++)
{
double x = X[i] - FlowSoundParameters.DistanceToPointOfMaximalSoundLevel - ContourParameters.NozzleCoordinate;
x = Math.Abs(x) < 0.001 ? 0.001 : x;
for (int j = 0; j < Ny; j++)
{
double y = Math.Abs(Y[j] - ContourParameters.ContourAreaHeight / 2);
double Angle;
if (x == 0)
{
Angle = Math.Sign(y) * Math.PI / 2;
}
else
{
Angle = Math.Atan(y / Math.Abs(x));
if (x < 0)
{
Angle = Math.PI - Angle;
}
}
double Radius = Math.Sqrt(x * x + y * y);
SoundLevels[i, j] = EngineSoundLevel(Radius, Angle);
}
}
var Contour = new Bitmap(W, H);
EngineSoundContour = new EngineSoundContour(X, Y, SoundLevels, Contour);
ModifyEngineSoundContour(ContourParameters.MinSoundLevel, ContourParameters.MaxSoundLevel, ref EngineSoundContour);
}
public StaticSoundLevel GetStaticSoundLevel(double Thrust, FlowParameters flowParameters, FrequencyBand frequencyBand)
{
return(fireTestNoiseModel.GetStaticSoundLevel(Thrust, flowParameters, frequencyBand));
}
public EngineSoundLevel GetEngineSoundLevel(double Thrust, FlowParameters FlowParameters)
{
return(engineNoiseModel.GetEngineSoundLevel(Thrust, FlowParameters));
}
public void CalculateEngineSoundContour(double Thrust, FlowParameters FlowParameters, EngineSoundContourParameters ContourParameters, out EngineSoundContour EngineSoundContour)
{
engineNoiseModel.Calculate(Thrust, FlowParameters, ContourParameters, out EngineSoundContour);
}
public EngineSoundLevelAtFrequency GetEngineSoundLevelAtFrequency(double Thrust, FlowParameters FlowParameters) // см. метод с аналогичной сигнатурой в IModel
{
double[] ExpandedFrequencies, ExpandedFrequenciesBand;
FrequenciesAggregator.Expanded(out ExpandedFrequencies, out ExpandedFrequenciesBand);
double[] spectralDecomposition = SpectralDecomposition.Get(1.01325E5, FlowParameters, ExpandedFrequencies, ExpandedFrequenciesBand);
double L0 = 10 * Math.Log10(0.5 * 0.0022 * Thrust * FlowParameters.NozzleFlowVelocity) + 120 - 11;
return((Radius, Angle) =>
{
var L = L0 - 20 * Math.Log10(Radius) + DI.Interpolate(Angle * 180 / Math.PI);
var Result = new Dictionary <double, double>();
for (int i = 0; i < ExpandedFrequencies.Length; i++)
{
Result.Add(ExpandedFrequencies[i], L + spectralDecomposition[i]);
}
return Result;
});
}
public EngineSoundLevelAtFrequency GetEngineSoundLevelAtFrequency(double Thrust, FlowParameters FlowParameters)
{
return(engineNoiseModel.GetEngineSoundLevelAtFrequency(Thrust, FlowParameters));
}
public FlowSoundParameters GetFlowSoundParameters(double Thrust, FlowParameters flowParameters)
{
return(engineNoiseModel.GetFlowSoundParameters(Thrust, flowParameters));
}