$$$$ CHAN NOTICE GOUNAND 14/01/31 21:15:01 7925 DATE 14/01/31 Operateur CHANGER Voir aussi : RELA ACCR ----------------- CMCT Depending on the data, the functions of this operator are different. The general syntax and the options are the following : OBJET1 = CHAN (MOT1) OBJET2 (OBJET3)(OBJET4) (OBJET..) (MOT2) (MOT3); ------------------------------------------------------------------ | OBJET1 | MOT1 | OBJET2 | OBJET3 | MOT2 | MOT3 ------------------------------------------------------------------ | MAILLAGE | (TYPE) | MAILLAGE ; | CHPOINT | 'CHPO' | MMODEL | MCHAML | ('MOYE') ; | ('SOMM') | MCHAML | 'NOEUD' | MMODEL | MCHAML ; | 'GRAVITE' | | 'RIGIDITE' | | 'MASSE' | | 'STRESSES' | | MCHAML | 'CHAM' | CHPOINT | MAILLAGE ; | CHPOINT | MMODEL | ('NOEUD') | (TYP1) ; | ('GRAVITE') | | ('RIGIDITE')| | ('MASSE' )| | ('STRESSES')| | MCHAML | 'TYPE' | MCHAML | | TYP1 ; | MCHAML | 'CONS' | MCHAML | | MOT1 ; | MMODEL | 'CONS' | MMODEL | | MOT1 ; | CHPOINT | 'ATTRIBUT' | CHPOINT | |'NATURE' | 'INDETER'; | 'DIFFUS' | 'DISCRET' | MATRIK | 'INCO' | MATRIK | LMOT1 LMOT2 LMOT3 LMOT4 ; | RIGIDITE | 'DEPE' | RIGIDITE ; | RIGIDITE | 'INCO' | RIGIDITE | LMOT1 LMOT2 LMOT3 LMOT4 | 'COMPL' | ('SYME') | | ('ANTI') | ('MULT') ; | ('QUEL') | | RIG1 RIG2 | 'COND' | RIGIDITE ; | CHPOINT | 'COMP' | MOT1 | CHPOINT | LISTMOT1 LISTMOT2 | |('NATU' |'INDETER' |'DIFFUS' |'DISCRET'); | MCHAML | 'COMP' | MOT1 | CHE1 ; | LISTMOT1 LISTMOT2 | | CHARGEME | 'TABL' | CHARG1 MOT1 | ; | MOT | 'MAJU' | MOT | ; | 'MINU' | ----------------- | 1st function | ----------------- GEO2 = CHAN (TYPE) GEO1 ; The CHAN operator constructs a MESH GEO2 which is identical to the MESH GEO1, but composed of elements of the requested type TYPE (MOT type). By default, the current type is taken into account (see OPTION). If GEO1 is made of full quadratic elements, TYPE can take one of the following values : 'TRI3', 'QUA4', 'TET4', 'PYR5', 'CUB8'. If the word 'LIGNE' is provided as TYPE, the generated mesh will consists solely of lines. If the word 'LINEAIRE' is provided as TYPE, each quadratic element of the mesh will be replaced by a linear one. If the word 'QUADRATIQUE' is provided as TYPE, each linear element of the mesh will be replaced by a quadratic one. If the word 'QUAF' is provided as TYPE, each 'QUADRATIQUE' element of the mesh will be replaced by a full quadratic one needed for fluid : TRI6 -> TRI7, QUA8 -> QUA9 CU20 -> CU27 etc. ----------------- | 2nd function | ----------------- CHP2 = CHAN 'CHPO' MODL1 CHAM1 ( 'MOT1' ); The key word 'CHPO' will bring about the CHAN operator to construct the CHPOINT CHPO2 from a new field by element CHAM1 (MCHAML type) lying on the mesh nodes and underlying the MODL1 model (MMODEL type), by averaging the values at the adjacent element nodes if the word MOT1 is forbidden or if it is equal to 'MOYE'. If the value of MOT1 is 'SOMM' the nodal values will be the sum of the contributions of each element. These values at nodes are defined either by extrapolation from known values inside the element for a field of SCALAIRE subtype, by using a least squares method and the shape functions of the element, or by averaging directly those values for the fields of any other type. The nature of the CHPOINT CHP2 is 'diffus'. ----------------- | 3rd function | ----------------- CHAM2 = CHAN | 'NOEUD' | MODL1 CHAM1 ; | 'GRAVITE' | | 'RIGIDITE' | | 'MASSE' | | 'STRESSES' | One of the following key words 'NOEUD', 'GRAVITE', 'RIGIDITE', 'MASSE', or 'STRESSES' will bring about the CHAN operator to construct from a new field by element CHAM1 (MCHAML type) and from a model object MODL1 (MCHAML type), a field by element CHAM2 of the same type as that given on input, lying respectively on the nodes, centres of gravity, stiffness integration points, mass integration points, and element stress calculation points. For this purpose, a least squares method is used together with the shape functions of the element. ----------------- | 4th function | ----------------- CHAM1 = CHAN 'CHAM' CHPO1 | GEO1 ; | MODL1 | ('NOEUD') | (TYP1) ; | 'GRAVITE' | | 'RIGIDITE' | | 'MASSE' | | 'STRESSES' | The keyword 'CHAM' will bring about the CHAN operator to create a new field by element CHAM1 (MCHAML type) from a field by point CHPO1 (CHPOINT type) lying on a MESH GEO1 or on a MMODEL MODL1. For this last case, the user may indicate the place where he wishes the MCHAML to lie: at the nodes (option by default), on the centre of gravity, on the stiffness integration points, on the mass integration points, on the stress calculation points in the elements. The user may also indicate a TYP1 subtype (MOT type) for the generated MCHAML (a blank by default). In the case of temperature field with shell elements integrated in thickness, T is calculated from T,TINF and TSUP with a parabolic variation of temperature in thickness. ----------------- | 5th function | ----------------- CHAM2 = CHAN 'TYPE' CHAM1 TYP1 ; The key word 'TYPE' will bring about the CHAN operator to create a new field by element CHAM2 (MCHAML type) with the subtype described by the string TYP1 from a new field by element CHAM1 (MCHAML type). ----------------- | 6th function | ----------------- No more used fonction. ----------------- | 7th function | ----------------- CHP2 = CHANGER 'ATTRIBUT' CHP1 'NATURE' | 'INDETER' | | 'DIFFUS' | | 'DISCRET' | ; With the key word 'ATTRIBUT', the operator will create a new field by point (CHPOINT type) identical to the field by elment chp1 (CHPOINT type) except for its attribut ,which can be modified by the other key word of the command (For instance 'NATURE' and 'DIFFUS'). It is advised to keep the same order of the terms in the command, as specified in the above. ----------------- | 8th function | ----------------- CHAM2 = CHAN 'CONS' CHAM1 MOT1 ; The key word 'TYPE' will bring about the CHAN operator to create a new field by element CHAM2 (MCHAML type) whose subzones constituant name is MOT1. The field CHAM1 must have only one name of constituant. ----------------- | 9th function | ----------------- rig2 = CHAN 'DEPE' RIG1 ; rig1 relations matrix (rela accro) rig2 dependence matrix A relation matrix is changed in dependence matrix .Allows to condense by elimination of slaves d.o.f. ( see use of CMCT) If this matrix is passed in RESOU whith others matrix and border conditions matrix instead of the matrix relation from which it is derived , the result is identical but solving has been performed on a matrix ol smaller size ----------------- | 10th function | ----------------- rig2 = CHAN 'INCO' RIG1 | LISTMOT1 LISTMOT2 LISTMOT3 LISTMOT4 | 'COMPL' | ('SYME') | | ('ANTI') | ('MULT') ; | ('QUEL') | rig1 object of type rigidite LISTMOT1 LISTMOT2 LISTMOT3 LISTMOT4 objetcs of type listmots To change names of primal or dual unknowns of a matrix. LISTMOT1 and LISTMOT2, with same length, are actual names of primal unknows and new names. LISTMOT3 and LISTMOT4 act on dual names of unknows. If the word COMPLEX is used, each names of unknowns is prefixed with the letter I. If necessary, the type of the stiffness matrix can be modified with 'SYME' (symetrical matrix), 'ANTI'(antisymetrical matrix) or 'QUEL' (full matrix). By default, rig2 has the same type than rig1. Attention, in order to compute the Lagrange multipliers, names of unknowns must be in a pre-defined list. This is the case of the unknowns generated by COMPLEX. Keyword 'MULT' allows one to change the name of the Lagrange multiplier unknowns. ----------------- | 11th function | ----------------- ----------------- rig2 rig3 = CHAN 'COND' RIG1 ; rig1 relations matrix ( rela accro ) rig2 condensation matrix rig3 duale matrix of rig2 If a condensation outside RESOU is needed by CMCT operator folowed by a resolution the rigth hand side must be also condensed by : chpo3 = chpo2 * rig3 back substitution on eliminated d.o.f. chpo4 = solution * rig2 ; ----------------- | 12th function | ----------------- MOD2 = CHAN 'CONS' MOD1 MOT1 ; The key word 'TYPE' will bring about the CHAN operator to create a new object MOD2 (MCHAML type) whose subzones constituant name is MOT1. MOD1 (MMODEL type) must have only one name of constituant. ----------------- | 13th function | ----------------- CHPO2 = CHAN 'COMP' | MOT1 | CHPO1 ( 'NATU' |'INDETER' | LISTMOT1 LISTMOT2 | |'DIFFUS' |'DISCRET' ) ; CHE2 = CHAN 'COMP' | MOT1 | CHE1 ; | LISTMOT1 LISTMOT2 | Description : ____________ With the keyword 'COMP', the operator creates a new field by points, or field by elements, and renames some components. The field by elements must be one constituant. When the field by points, or the field by elements, is one component, the syntax specifiing an object MOT is used. In the other cases, the names included in the first sublist of components are replaced by those of the second one. Contents : __________ CHPO1 : field by points (CHPOINT type) CHE1 : field by elements (MCHAML type) MOT1 : new name allocated to the component (MOT type) LISMOT1 : list of components to replace (type LISTMOTS) LISMOT2 : list of new components (type LISTMOTS) CHPO2 : generated object (CHPOINT type) CHE2 : generated object (MCHAML type) Notes : _______ 1. The components names are 4 characters. 2. The list LISMOT1 of components to replace can be only a sublist of the list of all components. The i-th component of LISMOT1 will be replaces with the i-th component of LISMOT2 (these lists are supposed to have the same length, which is inferior or equal to the number of components). ----------------- | 14th function | ----------------- CHARG1= 'CHAN' 'TABL' CHARG2 MOTYP; Description : ____________ The purpose of this option is to describe the object "CHARGEME" with the description Table-Table ( and not Chpoint-Evolution) in order to reduce the access time by TIRE operator. This is usefull in case of very high number of elementary "chargement" by example for seismic analysis.. Contents : __________ CHARG2 : object of type "CHARGEME" ( loads) MOTYP : oject of type "MOT" (word) defining the type of loads CHARG1 : result object of type "CHARGEME" which is the duplication of charg1 but presented differently. ------------------- | 15th Function | ------------------- MOT2 = 'CHAN' | 'MAJU' | MOT1 ; | 'MINU' | Description : _____________ Change a character string's case. Using 'MAJU' keyword, lowercase letters are upcased. Using 'MINU' keyword, upcase letters are downcased. Comments : __________ MOT2 : MOT type object (output) MOT1 : MOT type object (input)
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