Periodic oscillation translational constraint
This commit is contained in:
Vuko Vukcevic
parent
65b54e96d0
commit
9caa3ceb3b
7 changed files with 323 additions and 4 deletions
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@ -21,6 +21,7 @@ $(sixDOF)/constraints/rotationalConstraints/constantAngularAcceleration/constant
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$(sixDOF)/constraints/translationalConstraints/translationalConstraint/translationalConstraint.C
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$(sixDOF)/constraints/translationalConstraints/constantTranslationalAcceleration/constantTranslationalAcceleration.C
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$(sixDOF)/constraints/translationalConstraints/periodicOscillation/periodicOscillation.C
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$(sixDOF)/sixDOFODE/sixDOFODE.C
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$(sixDOF)/sixDOFODE/newSixDOFODE.C
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@ -51,7 +51,26 @@ Foam::constantAngularAcceleration::constantAngularAcceleration
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dir_(dict.lookup("constraintDirection")),
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alpha_(readScalar(dict.lookup("angularAcceleration"))),
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inGlobal_(dict.lookup("inGlobalCoordinateSystem"))
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{}
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{
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// Rescale direction
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if (mag(dir_) < SMALL)
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{
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FatalErrorIn
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(
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"Foam::constantTranslationalAcceleration::"
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"constantTranslationalAcceleration"
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"\n("
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"\n const word& name,"
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"\n const dictionary& dict"
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"\n)"
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) << "Zero direction specified. This is not allowed."
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<< exit(FatalError);
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}
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else
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{
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dir_ /= mag(dir_);
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}
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}
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Foam::autoPtr<Foam::rotationalConstraint>
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@ -59,7 +59,7 @@ class constantAngularAcceleration
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// Private data
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//- Direction of the constraint (unit vector)
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const vector dir_;
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vector dir_;
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//- Constant value of angular acceleration
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const scalar alpha_;
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@ -50,7 +50,26 @@ Foam::constantTranslationalAcceleration::constantTranslationalAcceleration
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translationalConstraint(name, dict),
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dir_(dict.lookup("constraintDirection")),
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a_(readScalar(dict.lookup("translationalAcceleration")))
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{}
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{
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// Rescale direction
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if (mag(dir_) < SMALL)
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{
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FatalErrorIn
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(
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"Foam::constantTranslationalAcceleration::"
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"constantTranslationalAcceleration"
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"\n("
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"\n const word& name,"
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"\n const dictionary& dict"
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"\n)"
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) << "Zero direction specified. This is not allowed."
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<< exit(FatalError);
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}
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else
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{
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dir_ /= mag(dir_);
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}
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}
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Foam::autoPtr<Foam::translationalConstraint>
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@ -59,7 +59,7 @@ class constantTranslationalAcceleration
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// Private data
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//- Direction of the constraint (unit vector)
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const vector dir_;
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vector dir_;
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//- Constant value of the translational acceleration
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const scalar a_;
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@ -0,0 +1,136 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "periodicOscillation.H"
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#include "addToRunTimeSelectionTable.H"
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#include "mathematicalConstants.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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defineTypeNameAndDebug(periodicOscillation, 0);
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addToRunTimeSelectionTable
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(
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translationalConstraint,
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periodicOscillation,
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word
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);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::periodicOscillation::periodicOscillation
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(
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const word& name,
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const dictionary& dict
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)
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:
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translationalConstraint(name, dict),
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dir_(dict.lookup("direction")),
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a_(readScalar(dict.lookup("motionAmplitude"))),
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period_(readScalar(dict.lookup("period"))),
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omega_(mathematicalConstant::twoPi/period_),
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phi_(readScalar(dict.lookup("phaseShift"))*mathematicalConstant::pi/180.0)
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{
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// Rescale direction
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if (mag(dir_) < SMALL)
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{
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FatalErrorIn
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(
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"Foam::periodicOscillation::periodicOscillation"
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"\n("
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"\n const word& name,"
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"\n const dictionary& dict"
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"\n)"
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) << "Zero direction specified. This is not allowed."
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<< exit(FatalError);
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}
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else
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{
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dir_ /= mag(dir_);
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}
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}
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Foam::autoPtr<Foam::translationalConstraint>
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Foam::periodicOscillation::clone() const
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{
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return autoPtr<translationalConstraint>
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(
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new periodicOscillation(*this)
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);
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::periodicOscillation::~periodicOscillation()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::vector Foam::periodicOscillation::matrixContribution
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(
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const scalar,
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const tensor&,
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const vector&,
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const vector&
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) const
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{
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return dir_;
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}
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Foam::scalar Foam::periodicOscillation::sourceContribution
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(
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const scalar t,
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const tensor&,
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const vector&,
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const vector&
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) const
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{
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return -a_*sqr(omega_)*(sin(omega_*t + phi_));
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}
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void Foam::periodicOscillation::write(Ostream& os) const
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{
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os.writeKeyword("type") << tab << type()
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<< token::END_STATEMENT << nl << nl;
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os.writeKeyword("direction") << tab << dir_
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<< token::END_STATEMENT << nl;
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os.writeKeyword("motionAmplitude") << tab << a_
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<< token::END_STATEMENT << nl;
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os.writeKeyword("period") << tab << period_
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<< token::END_STATEMENT << nl;
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os.writeKeyword("phaseShift") << tab
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<< phi_*180.0/mathematicalConstant::pi << token::END_STATEMENT << endl;
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}
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// ************************************************************************* //
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@ -0,0 +1,144 @@
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::periodicOscillation
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Description
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Periodic translational motion given by:
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g(vDot, t) = vDot + a*omega^2*sin(omega*t + phi) = 0,
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where a is the amplitude of oscillation, omega radial frequency and phi is
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the phase shift.
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Author
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Viktor Pandza, FSB Zagreb. All rights reserved.
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Vuko Vukcevic, FSB Zagreb. All rights reserved.
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SourceFiles
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periodicOscillation.C
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\*---------------------------------------------------------------------------*/
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#ifndef periodicOscillation_H
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#define periodicOscillation_H
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#include "translationalConstraint.H"
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#include "OFstream.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Class periodicOscillation Declaration
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\*---------------------------------------------------------------------------*/
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class periodicOscillation
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:
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public translationalConstraint
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{
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// Private data
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//- Direction
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vector dir_;
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//- Amplitude of the motion
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const scalar a_;
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//- Period of the motion
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const scalar period_;
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//- Radian frequency of the motion
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const scalar omega_;
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//- Phase shift (in degrees)
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const scalar phi_;
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public:
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//- Runtime type information
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TypeName("periodicOscillation");
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// Constructors
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//- Construct from dictionary
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periodicOscillation
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(
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const word& name,
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const dictionary& dict
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);
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//- Construct and return a clone
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virtual autoPtr<translationalConstraint> clone() const;
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// Destructor
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virtual ~periodicOscillation();
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// Member Functions
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// Constraint specific functions
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//- Return matrix contribution defined by constraint, f(t)
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virtual vector matrixContribution
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(
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const scalar,
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const tensor&,
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const vector&,
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const vector&
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) const;
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//- Return source contribution defined by constraint, a(t)
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virtual scalar sourceContribution
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(
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const scalar t,
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const tensor&,
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const vector&,
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const vector&
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) const;
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// I-O Functions
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//- Virtual write function
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virtual void write(Ostream& os) const;
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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