00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software: you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by 00013 the Free Software Foundation, either version 3 of the License, or 00014 (at your option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. 00023 00024 Class 00025 Foam::sixDoFRigidBodyMotionRestraints::linearSpring 00026 00027 Description 00028 sixDoFRigidBodyMotionRestraints model. Linear spring. 00029 00030 SourceFiles 00031 linearSpring.C 00032 00033 \*---------------------------------------------------------------------------*/ 00034 00035 #ifndef linearSpring_H 00036 #define linearSpring_H 00037 00038 #include <forces/sixDoFRigidBodyMotionRestraint.H> 00039 #include <OpenFOAM/point.H> 00040 00041 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00042 00043 namespace Foam 00044 { 00045 00046 namespace sixDoFRigidBodyMotionRestraints 00047 { 00048 00049 /*---------------------------------------------------------------------------*\ 00050 Class linearSpring Declaration 00051 \*---------------------------------------------------------------------------*/ 00052 00053 class linearSpring 00054 : 00055 public sixDoFRigidBodyMotionRestraint 00056 { 00057 // Private data 00058 00059 //- Anchor point, where the spring is attached to an immovable 00060 // object 00061 point anchor_; 00062 00063 //- Reference point of attachment to the solid body 00064 point refAttachmentPt_; 00065 00066 //- Spring stiffness coefficient (N/m) 00067 scalar stiffness_; 00068 00069 //- Damping coefficient (Ns/m) 00070 scalar damping_; 00071 00072 //- Rest length - length of spring when no forces are applied to it 00073 scalar restLength_; 00074 00075 00076 public: 00077 00078 //- Runtime type information 00079 TypeName("linearSpring"); 00080 00081 00082 // Constructors 00083 00084 //- Construct from components 00085 linearSpring 00086 ( 00087 const dictionary& sDoFRBMRDict 00088 ); 00089 00090 //- Construct and return a clone 00091 virtual autoPtr<sixDoFRigidBodyMotionRestraint> clone() const 00092 { 00093 return autoPtr<sixDoFRigidBodyMotionRestraint> 00094 ( 00095 new linearSpring(*this) 00096 ); 00097 } 00098 00099 00100 // Destructor 00101 00102 virtual ~linearSpring(); 00103 00104 00105 // Member Functions 00106 00107 //- Calculate the restraint position, force and moment. 00108 // Global reference frame vectors. 00109 virtual void restrain 00110 ( 00111 const sixDoFRigidBodyMotion& motion, 00112 vector& restraintPosition, 00113 vector& restraintForce, 00114 vector& restraintMoment 00115 ) const; 00116 00117 //- Update properties from given dictionary 00118 virtual bool read(const dictionary& sDoFRBMRCoeff); 00119 00120 //- Write 00121 virtual void write(Ostream&) const; 00122 }; 00123 00124 00125 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00126 00127 } // End namespace solidBodyMotionFunctions 00128 } // End namespace Foam 00129 00130 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00131 00132 #endif 00133 00134 // ************************ vim: set sw=4 sts=4 et: ************************ //
