Perform noise analysis on point-based pressure data. More...

Inheritance diagram for pointNoise:

Collaboration diagram for pointNoise:

Public Member Functions
	TypeName ("pointNoise")
	Runtime type information. More...

	pointNoise (const dictionary &dict, const bool readFields=true)
	Constructor. More...

virtual	~pointNoise ()=default
	Destructor. More...

virtual bool	read (const dictionary &dict)
	Read from dictionary. More...

virtual void	calculate ()
	Calculate. More...

Public Member Functions inherited from noiseModel
	TypeName ("noiseModel")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, noiseModel, dictionary,(const dictionary &dict),(dict))
	Run time selection table. More...

	noiseModel (const dictionary &dict, const bool readFields=true)
	Constructor. More...

virtual	~noiseModel ()=default
	Destructor. More...

virtual bool	read (const dictionary &dict)
	Read from dictionary. More...

virtual void	calculate ()=0
	Abstract call to calculate. More...

tmp< Foam::scalarField >	PSD (const scalarField &PSDf) const
	PSD [dB/Hz]. More...

tmp< scalarField >	SPL (const scalarField &Prms2, const scalar f) const
	SPL [dB]. More...

tmp< scalarField >	SPL (const scalarField &Prms2, const scalarField &f) const
	SPL [dB]. More...

void	cleanFFTW ()
	Clean up the FFTW. More...

void	writeWeightings () const
	Helper function to check weightings. More...

Protected Member Functions
void	filterTimeData (const scalarField &t0, const scalarField &p0, scalarField &t, scalarField &p) const

void	processData (const label dataseti, const Function1Types::CSV< scalar > &data)
	Process the CSV data. More...

Protected Member Functions inherited from noiseModel
void	readWriteOption (const dictionary &dict, const word &lookup, bool &option) const
	Helper function to read write options and provide info feedback. More...

scalar	checkUniformTimeStep (const scalarList &times) const
	Check and return uniform time step. More...

bool	validateBounds (const scalarList &p) const
	Return true if all pressure data is within min/max bounds. More...

label	findStartTimeIndex (const instantList &allTimes, const scalar startTime) const
	Find and return start time index. More...

fileName	baseFileDir (const label dataseti) const
	Return the base output directory. More...

tmp< scalarField >	uniformFrequencies (const scalar deltaT, const bool check) const

tmp< scalarField >	octaves (const scalarField &data, const scalarField &f, const labelUList &freqBandIDs) const
	Generate octave data. More...

tmp< scalarField >	Pf (const scalarField &p) const
	Return the fft of the given pressure data. More...

tmp< scalarField >	meanPf (const scalarField &p) const
	Return the multi-window mean fft of the complete pressure data [Pa]. More...

tmp< scalarField >	RMSmeanPf (const scalarField &p) const

tmp< scalarField >	PSDf (const scalarField &p, const scalar deltaT) const

scalar	RAf (const scalar f) const
	A weighting function. More...

scalar	gainA (const scalar f) const
	A weighting as gain in dB. More...

scalar	RBf (const scalar f) const
	B weighting function. More...

scalar	gainB (const scalar f) const
	B weighting as gain in dB. More...

scalar	RCf (const scalar f) const
	C weighting function. More...

scalar	gainC (const scalar f) const
	C weighting as gain in dB. More...

scalar	RDf (const scalar f) const
	D weighting function. More...

scalar	gainD (const scalar f) const
	D weighting as gain in dB. More...

Protected Attributes
List< fileName >	inputFileNames_
	Input file names - optional. More...

Protected Attributes inherited from noiseModel
const dictionary	dict_
	Copy of dictionary used for construction. More...

scalar	rhoRef_
	Reference density (to convert from kinematic to static pressure) More...

label	nSamples_
	Number of samples in sampling window, default = 2^16. More...

scalar	fLower_
	Lower frequency limit, default = 25Hz. More...

scalar	fUpper_
	Upper frequency limit, default = 10kHz. More...

scalar	startTime_
	Start time, default = 0s. More...

autoPtr< windowModel >	windowModelPtr_
	Window model. More...

word	graphFormat_
	Graph format. More...

weightingType	SPLweighting_
	Weighting. More...

scalar	dBRef_
	Reference for dB calculation, default = 2e-5. More...

scalar	minPressure_
	Min pressure value. More...

scalar	maxPressure_
	Min pressure value. More...

fileName	outputPrefix_
	Output file prefix, default = ''. More...

bool	writePrmsf_
	Write Prmsf; default = yes. More...

bool	writeSPL_
	Write SPL; default = yes. More...

bool	writePSD_
	Write PSD; default = yes. More...

bool	writePSDf_
	Write PSDf; default = yes. More...

bool	writeOctaves_
	Write writeOctaves; default = yes. More...

planInfo	planInfo_
	Plan information for FFTW. More...

Additional Inherited Members
Public Types inherited from noiseModel
enum class	weightingType { none , dBA , dBB , dBC , dBD }

Static Public Member Functions inherited from noiseModel
static autoPtr< noiseModel >	New (const dictionary &dict)
	Selector. More...

Static Public Attributes inherited from noiseModel
static const Enum< weightingType >	weightingTypeNames_

Static Protected Member Functions inherited from noiseModel
static void	setOctaveBands (const scalarField &f, const scalar fLower, const scalar fUpper, const scalar octave, labelList &fBandIDs, scalarField &fCentre)

Detailed Description

Perform noise analysis on point-based pressure data.

Input data is read from a dictionary, e.g.

// Pressure reference
pRef            0;

// Number of samples in sampling window, default = 2^16 (=65536)
N               4096;

// Lower frequency bounds
fl              25;

// Upper frequency bounds
fu              25;

// Start time
startTime       0;

windowModel     <modelType>
<modelType>Coeffs
{
    ...
}

// Pressure data supplied in CSV file format
file            "pressureData";
//files           ("pressureData1" "pressureData2");
nHeaderLine     1;
refColumn       0;
componentColumns (1);
separator       " ";
mergeSeparators yes;

graphFormat     raw;

Source files

See also: noiseModel.H windowModel.H

Definition at line 94 of file pointNoise.H.

Constructor & Destructor Documentation

◆ pointNoise()

pointNoise	(	const dictionary &	dict,
		const bool	readFields = `true`
	)

Constructor.

Definition at line 225 of file pointNoise.C.

References dict, pointNoise::read(), and Foam::readFields().

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◆ ~pointNoise()

virtual ~pointNoise ( )

virtualdefault

Destructor.

Member Function Documentation

◆ filterTimeData()

void filterTimeData	(	const scalarField &	t0,
		const scalarField &	p0,
		scalarField &	t,
		scalarField &	p
	)		const

protected

Definition at line 46 of file pointNoise.C.

References DynamicList< T, SizeMin >::append(), forAll, p, p0, UList< T >::size(), noiseModel::startTime_, and List< T >::transfer().

Referenced by pointNoise::processData().

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◆ processData()

void processData	(	const label	dataseti,
		const Function1Types::CSV< scalar > &	data
	)

protected

Process the CSV data.

Definition at line 71 of file pointNoise.C.

References Foam::average(), noiseModel::baseFileDir(), noiseModel::checkUniformTimeStep(), Foam::endl(), f(), pointNoise::filterTimeData(), noiseModel::fLower_, noiseModel::fUpper_, g, noiseModel::graphFormat_, Foam::Info, Foam::nl, windowModel::nSamples(), noiseModel::octaves(), p, noiseModel::PSD(), noiseModel::PSDf(), noiseModel::rhoRef_, noiseModel::RMSmeanPf(), noiseModel::setOctaveBands(), UList< T >::size(), noiseModel::SPL(), noiseModel::SPLweighting_, noiseModel::uniformFrequencies(), noiseModel::validateBounds(), noiseModel::weightingTypeNames_, noiseModel::windowModelPtr_, graph::wordify(), regIOobject::write(), noiseModel::writeOctaves_, noiseModel::writePrmsf_, noiseModel::writePSD_, noiseModel::writePSDf_, and noiseModel::writeSPL_.

Referenced by pointNoise::calculate().

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◆ TypeName()

TypeName ( "pointNoise" )

Runtime type information.

◆ read()

bool read ( const dictionary & dict )

virtual

Read from dictionary.

Reimplemented from noiseModel.

Definition at line 262 of file pointNoise.C.

References dict, UList< T >::first(), pointNoise::inputFileNames_, kEpsilonLopesdaCosta< BasicTurbulenceModel >::read(), dictionary::readEntry(), dictionary::readIfPresent(), and List< T >::resize().

Referenced by pointNoise::pointNoise().

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◆ calculate()

void calculate ( )

virtual

Calculate.

Implements noiseModel.

Definition at line 238 of file pointNoise.C.

References noiseModel::dict_, argList::envGlobalPath(), string::expand(), forAll, pointNoise::inputFileNames_, fileName::isAbsolute(), splitCell::master(), and pointNoise::processData().

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Member Data Documentation

◆ inputFileNames_

List<fileName> inputFileNames_

protected

Input file names - optional.

Definition at line 104 of file pointNoise.H.

Referenced by pointNoise::calculate(), and pointNoise::read().

The documentation for this class was generated from the following files:

src/randomProcesses/noise/noiseModels/pointNoise/pointNoise.H
src/randomProcesses/noise/noiseModels/pointNoise/pointNoise.C

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ pointNoise()

◆ ~pointNoise()

Member Function Documentation

◆ filterTimeData()

◆ processData()

◆ TypeName()

◆ read()

◆ calculate()

Member Data Documentation

◆ inputFileNames_