genfm.h

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/aero/genfm.h,v 1.20 2017/01/12 14:45:58 masarati Exp $ */
/*
 * MBDyn (C) is a multibody analysis code.
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef GENFM_H
#define GENFM_H

/* Generic force/moment element based on table lookup */
/* originated from GARTEUR HC AG-16 activity to model generic aerodynamic
 * forces related to rigid body motion as a function of dynamic pressure
 * angle of attack and sideslip angle, with data provided by DLR for Bo105
 * fuselage and tail empennages */

#include "aerodyn.h"

struct GenericAerodynamicData {
        std::string name;

        bool bAlphaFirst;

        /* angle of attack and sideslip angle datapoints number */
        int nAlpha;
        int nBeta;

        std::vector<doublereal> Alpha;
        std::vector<doublereal> Beta;

        struct GenericAerodynamicCoef {
                doublereal      dCoef[6];

                GenericAerodynamicCoef(void);
                GenericAerodynamicCoef(const GenericAerodynamicCoef& c);
                GenericAerodynamicCoef operator + (const GenericAerodynamicCoef& c) const;
                GenericAerodynamicCoef operator - (const GenericAerodynamicCoef& c) const;
                GenericAerodynamicCoef operator * (const doublereal& d) const;
                GenericAerodynamicCoef operator / (const doublereal& d) const;
        };

        std::vector<std::vector<GenericAerodynamicCoef> > Data;
};

class GenericAerodynamicForce :
        virtual public Elem,
        public AerodynamicElem,
        public InitialAssemblyElem
{
protected:
        /* Node the forces are applied to */
        const StructNode* pNode;
        /* Reference surface and length used to dimensionalize
         * non-dimensional coefficients */
        const doublereal dRefSurface;
        const doublereal dRefLength;
        const bool bAlphaFirst;
        /* Offset of aerodynamic center with respect to node position */
        const Vec3 tilde_f;
        /* orientation of aerodynamic reference frame with respect to node */
        const Mat3x3 tilde_Ra;  /* Rotaz. del sistema aerodinamico al nodo */

        /* force and moment */
        Vec3 tilde_F;
        Vec3 tilde_M;
        Vec3 F;
        Vec3 M;

        // persistent
        doublereal dAlpha, dBeta;

        /* aerodynamic data */
        GenericAerodynamicData *pData;

        /* Assemblaggio residuo */
        void AssVec(SubVectorHandler& WorkVec);

public:
        GenericAerodynamicForce(unsigned int uLabel,
                const DofOwner *pDO,
                const StructNode* pN,
                const Vec3& fTmp, const Mat3x3& RaTmp,
                doublereal dS, doublereal dL, bool bAlphaFirst,
                GenericAerodynamicData *pData,
                flag fOut);
        virtual ~GenericAerodynamicForce(void);

        /* Scrive il contributo dell'elemento al file di restart */
        virtual std::ostream& Restart(std::ostream& out) const;

        /* Tipo dell'elemento (usato per debug ecc.) */
        virtual Elem::Type GetElemType(void) const;

        /* funzioni proprie */

        /* Dimensioni del workspace */
        virtual void
        WorkSpaceDim(integer* piNumRows, integer* piNumCols) const;

        /* assemblaggio jacobiano */
        virtual VariableSubMatrixHandler&
        AssJac(VariableSubMatrixHandler& WorkMat,
                doublereal dCoef,
                const VectorHandler& XCurr,
                const VectorHandler& XPrimeCurr);

        /* assemblaggio residuo */
        virtual SubVectorHandler&
        AssRes(SubVectorHandler& WorkVec,
               doublereal dCoef,
               const VectorHandler& XCurr,
               const VectorHandler& XPrimeCurr);

        /*
         * output; si assume che ogni tipo di elemento sappia, attraverso
         * l'OutputHandler, dove scrivere il proprio output
         */
        virtual void Output(OutputHandler& OH) const;

        /* Dati privati */
        virtual unsigned int iGetNumPrivData(void) const;
        virtual unsigned int iGetPrivDataIdx(const char *s) const;
        virtual doublereal dGetPrivData(unsigned int i) const;

        /* Numero di GDL iniziali */
        virtual unsigned int iGetInitialNumDof(void) const;

        /* Dimensioni del workspace */
        virtual void
        InitialWorkSpaceDim(integer* piNumRows, integer* piNumCols) const;

        /* assemblaggio jacobiano */
        virtual VariableSubMatrixHandler&
        InitialAssJac(VariableSubMatrixHandler& WorkMat,
                const VectorHandler& XCurr);

        /* assemblaggio residuo */
        virtual SubVectorHandler&
        InitialAssRes(SubVectorHandler& WorkVec,
                const VectorHandler& XCurr);

        /* Tipo di elemento aerodinamico */
        virtual AerodynamicElem::Type GetAerodynamicElemType(void) const;

        /*
         * Fornisce il tipo e la label dei nodi che sono connessi all'elemento
         * utile per l'assemblaggio della matrice di connessione fra i dofs
         */
        virtual void
        GetConnectedNodes(std::vector<const Node *>& connectedNodes) const;
};

extern Elem *
ReadGenericAerodynamicForce(DataManager* pDM, MBDynParser& HP,
        const DofOwner *pDO, unsigned int uLabel);

/* GenericAerodynamicForce - end */

#endif /* GENFM_H */