PAT312, Section 36, December 2006 S36-1 Copyright 2007 MSC.Software Corporation SECTION 36 ELEMENT PROPERTIES FORM AND ELEMENT TYPES. - презентация

1 PAT312, Section 36, December 2006 S36-1 Copyright 2007 MSC.Software Corporation SECTION 36 ELEMENT PROPERTIES FORM AND ELEMENT TYPES

2 PAT312, Section 36, December 2006 S36-2 Copyright 2007 MSC.Software Corporation

3 PAT312, Section 36, December 2006 S36-3 Copyright 2007 MSC.Software Corporation ELEMENT PROPERTIES FORM l Option menus on this form determine: l Element dimensionality l Element type and options l Element property form content l Select element dimensionality l 0D (point elements) l 1D (bar elements) l 2D (tri and quad elements) l 3D (tet, wedge and hex elements) l Select element type l Further defines the type of element: l Shell vs. Thermal 2D l Conduction bar vs. Advection bar l Available options depend on type

4 PAT312, Section 36, December 2006 S36-4 Copyright 2007 MSC.Software Corporation ELEMENT PROPERTIES l The following table summarizes the allowable selections for MSC.Thermal element properties

5 PAT312, Section 36, December 2006 S36-5 Copyright 2007 MSC.Software Corporation ELEMENT PROPERTIES (Cont.)

6 PAT312, Section 36, December 2006 S36-6 Copyright 2007 MSC.Software Corporation NODE TYPE ELEMENT This Element Properties input form appears when the following options have been selected: The 0D element property is used to define special node types. Select the string value type Thermal Node Fluid Node Information Node Default node type is Thermal Node. Define node type elements if the node type is Fluid Node or Information Node Note: This element Property can only be applied to points or nodes on which a 0D (point) element has been created

7 PAT312, Section 36, December 2006 S36-7 Copyright 2007 MSC.Software Corporation CONDUCTION BAR This Element Properties input form appears when the following options have been selected: The conduction bar element is used to define conduction heat transfer. Enter the material to be used. A list of all materials currently in the database is displayed. (required input) Enter the cross-sectional area for the bar element at node 1. Note: for 2D models, enter the thickness at nodes 1 and 2. Used with 2D Plane Geometry dimensionality (Analysis/Translation Parameters) Enter the cross-sectional area for the bar element at node 2. Node ID or vector to define xy plane for element orientation. Note: This data is required to differentiate between "top" and "bottom" when Viewfactor LBCs are applied to bar elements.

8 PAT312, Section 36, December 2006 S36-8 Copyright 2007 MSC.Software Corporation ADVECTION BAR This Element Properties input form appears when the following options have been selected: This bar element is used to define advective fluid flow when the mass flow rate is known. The Specific Heat MPID is REQUIRED. Define the Cp in Fields/Material Properties/General even if it is a constant value. Enter the MPID here. Enter the mass flow rate of the fluid flow. If no mass flow MPID is entered, the value entered is taken as constant mass flow rate for the advective bar. Enter an optional mass flow rate MPID for variable mass flow rates. If mass flow MPID is entered, the mass flow rate value entered is taken as scale factor and the effective mass flow rate is calculated from the product of MPIDs value and mass flow rate.

9 PAT312, Section 36, December 2006 S36-9 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-PIPE Enter a non-zero number as a dummy ID. Enter the flow network element option (e.g., IOPT = 1 for constant properties pipe element). Enter pipe length. If the pipe length is not specified, MSC.Thermal will compute the length as the distance between the element nodes. This Element Properties input form appears when the following options have been selected: This bar element is used to define the hydraulic network flow of a fluid when the mass flow rate is known.

10 PAT312, Section 36, December 2006 S36-10 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-PIPE This is a list of data inputs available for creating Flow network bar elements, which were not shown on the previous pages. Use the scroll bar in the property input form to input these properties.

11 PAT312, Section 36, December 2006 S36-11 Copyright 2007 MSC.Software Corporation Flow Network Bar-Turbine This Element Properties input form appears when the following options have been selected: This is a flow network bar used for hydraulics analysis. Enter a nonzero number as a TID. If the option chosen does not require a template ID, the number entered here will be taken as a dummy ID. Enter the flow network element option: IOPT = 6 for constant property turbine IOPT = 7 for variable property turbine pointing to a FLUID TID Enter constant fluid density, viscosity, specific heat, turbine head. If the fluid density, viscosity, specific heat, and turbine head are not constants, they have to be defined with MPIDs in the FLUID template and the data input on this form will be ignored. However, some dummy data has to be entered.

12 PAT312, Section 36, December 2006 S36-12 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-PUMP Enter a nonzero number as a TID. If the option chosen does not require a template ID, the number entered here will be taken as a dummy ID. Enter the flow network element option: IOPT = 4 for constant property pump IOPT = 5 for variable property pump pointing to a FLUID TID Enter constant fluid density, viscosity, specific heat, turbine head. If the fluid density, viscosity, specific heat, and pump head are not constants, they have to be defined with MPIDs in the template and the data input on this form will be ignored. However, some dummy data has to be entered. This Element Properties input form appears when the following options have been selected: This element is used to define a pump in a flow network.

13 PAT312, Section 36, December 2006 S36-13 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-CHECK VALVE This Element Properties input form appears when the following options have been selected: This element is defines a check valve in a flow network. A flow reversal would close the valve. Enter a nonzero number as a TID. If the option chosen does not require a template ID, the number entered here will be taken as a dummy ID. Enter the flow network element option: IOPT = 9 for constant property valve IOPT = 10 for variable property valve pointing to a FLUID TID Enter pipe diameter or pipe cross- sectional area or pipe cross-sectional area and pipe perimeter. Enter pipe length. If pipe length is not specified, MSC.Thermal will calculate the pipe length as the distance between the pipe element nodes.

14 PAT312, Section 36, December 2006 S36-14 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-CHECK VALVE This is a list of data inputs, available for creating Flow network check- valve elements, which were not shown on the previous pages. Use the scroll bar in the property input form to input these properties.

15 PAT312, Section 36, December 2006 S36-15 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR HEAD LOSS This Element Properties input form appears when the following options have been selected: This is a head loss element used to define losses in a flow network (e.g., losses in orifices, valves, bend, tees, etc.) Enter a nonzero number as a TID. If the option chosen does not require a template ID, the number entered here will be taken as a dummy ID. Enter the flow network element option: IOPT = 8 for variable geometry, variable head loss element pointing to a FLUID TID If pipe length is input, it is used; otherwise, pipe length is computed by MSC.Thermal. Enter scale factors on pipe diameter, head loss coefficient, pipe roughness. These scale factors will be used with the respective material property (MPID) evaluations.

16 PAT312, Section 36, December 2006 S36-16 Copyright 2007 MSC.Software Corporation FLOW NETWORK BAR-PLENUM This Element Properties input form appears when the following options have been selected: This is a plenum element used in a flow network to define a large reservoir. Enter a nonzero number as a TID. If the option chosen does not require a template ID, the number entered here will be taken as a dummy ID. Enter the flow network element option: IOPT = 11 for a plenum element with constant physical and material properties IOPT =12 for a variables property plenum pointing to a FLUID TID Enter constant fluid density, viscosity, specific heat. If the fluid density, viscosity, and specific heat are not constants, they have to be defined with MPIDs in the template and the data input on this form will be ignored. Input Properties Definitions below.

17 PAT312, Section 36, December 2006 S36-17 Copyright 2007 MSC.Software Corporation RADIATION SYMMETRY BAR This Element Properties input form appears when the following options have been selected: This bar element is used to define radiation rotation symmetry. Enter the number of rotations about the bars axis. This is a required property. Enter the angular increment in degrees. This is a required property.

18 PAT312, Section 36, December 2006 S36-18 Copyright 2007 MSC.Software Corporation AXISYMMETRIC BAR This bar element is used to define thin axisymmetric shells. Note: This element property is used with the axisymmetric modeling dimensionality Enter the material to be used. When entering data here, a list of all materials currently in the database is displayed. May either pick one from the list or type in the name. This property is required. Enter the thickness of the bar element at Node 1. Enter the thickness of the bar element at Node 2. Node ID line as weights vector which defines the orientations of the bar element. Global origin is the default. This Element Properties input form appears when the following options have been selected:

19 PAT312, Section 36, December 2006 S36-19 Copyright 2007 MSC.Software Corporation SHELL This form applies to quad and tri shell elements and requires thickness definitions. Enter the material to be used. When entering data here, a list of all materials currently in the database is displayed. May either pick one from the list or type in the name. This property is required. Material orientation can be entered as indicated. There is information on this at the end of this section. This is optional. Enter the material orientation angles about 1,2,3 axis. These are optional properties. Only a single thickness entry is required. Optionally, corner shell thicknesses may be entered separated by commas or blank spaces. For quad element (4) thickness values have to be entered, while for a tri element (3) thickness values are needed. If the shell thickness is constant a (4) (shell thickness) or (3) (shell thickness) can be entered for a quad or a tri element, respectively. This Element Properties input form appears when the following options have been selected:

20 PAT312, Section 36, December 2006 S36-20 Copyright 2007 MSC.Software Corporation THERMAL 2D This form applies to 2D elements. In MSC.Thermal they are assigned a unit thickness. Note: This element property is used with the 2D Plane model dimensionality. Enter the material to be used. When entering data here, a list of all materials currently in the database is displayed. May either pick one from the list or type in the name. This property is required. Enter the material orientation angles about X,Y,Z axis. These are optional properties. This Element Properties input form appears when the following options have been selected:

21 PAT312, Section 36, December 2006 S36-21 Copyright 2007 MSC.Software Corporation THERMAL AXISYMMETRIC This form applies to axisymmetric quad and tri elements. Note: This element property is used with the axisymmetric modeling dimensionality Enter the material to be used. When entering data here, a list of all materials currently in the database is displayed. May either pick one from the list or type in the name. This property is required. Enter the material orientation angles about X,Y,Z axis. These are optional properties. This Element Properties input form appears when the following options have been selected:

22 PAT312, Section 36, December 2006 S36-22 Copyright 2007 MSC.Software Corporation THERMAL AXISYMMETRIC This element property is used in a mixed axisymmetric and 3D model. It applies to axisymmetric quad and tri elements. Warning: This element property definition requires setting model dimensionality to axisymmetric geometry and selecting the radial and centerline axes under Analysis, Translation Parameters. The axisymmetric elements must lie on the plane and the 3D component must lie in the first quadrant. Enter the material to be used. (required) Enter the material orientation angles about X,Y,Z-axes. (optional) Enter the number of degrees for the axisymmetric rotation. Typically corresponds to the 3D detail sector repeat angle. Usage: The axisymmetric element is tied to the 3D detail by a Coupled Temperature or Convection/Between Regions LBC. Do not use Convection Elements. This element property is not applicable to Viewfactors. This Element Properties input form appears when the following options have been selected:

23 PAT312, Section 36, December 2006 S36-23 Copyright 2007 MSC.Software Corporation RADIATION SYMMETRY TRI NO input properties required.

24 PAT312, Section 36, December 2006 S36-24 Copyright 2007 MSC.Software Corporation CONVECTIVE QUAD This element property is used to define convective heat transfer between solid and fluid. No cross resistors are generated for convective quad elements. Enter the convection Template ID. The template will be used in calculating the convective heat transfer coefficient. The number of geometric properties required will vary with the convection configuration used. Geometry property 1 will be taken from MSC.Patran. This Element Properties input form appears when the following options have been selected:

25 PAT312, Section 36, December 2006 S36-25 Copyright 2007 MSC.Software Corporation THERMAL 3D SOLID Enter the material to be used. (required) Enter the material orientation angles. (optional) This form applies to 3D solid elements. This Element Properties input form appears when the following options have been selected:

26 PAT312, Section 36, December 2006 S36-26 Copyright 2007 MSC.Software Corporation THERMAL 3D SOLID/FINITE DIFF HEX This form applies to finite difference orthogonal hex elements. Specify a material number (e.g., 1 or m:1) that references a material definition in the MSC.Thermal template.dat file of the MSC.Thermal materials database. Alternately, specify a material name (e.g., aluminum). Previously assigned material property sets are listed which may be assigned to this element property input form. This Element Properties input form appears when the following options have been selected:

27 PAT312, Section 36, December 2006 S36-27 Copyright 2007 MSC.Software Corporation THERMAL 3D SOLID/SCALED FE HEX... This property is used for mixed axisymmetric and 3D models. The axisymmetric portion is treated as a 360 degree rotation. The scale factor is applied to the capacitance and surface area of the 3D elements. Specify a material number or a material name (e.g., aluminum). Note: If a name is entered, the next available MID number will be assigned for use by MSC.Thermal. Warning: Do not mix material names and MID references in the same model. The thermal capacitance and surface area of the elements will be scaled by this multiplying factor. Usage: These 3D elements are tied to the 360-degree Axisymmetric elements by a Coupled Temperature or Convection Between Regions LBC. Do not use Convection Elements. This element property is not applicable to Viewfactors. Previously assigned material property sets are listed which may be assigned to this element property input form. This Element Properties input form appears when the following options have been selected:

28 PAT312, Section 36, December 2006 S36-28 Copyright 2007 MSC.Software Corporation CONVECTIVE HEX/WEDGE This property defines hex/wedge elements for convective heat transfer between solid and fluid. No cross resistors are generated for convective hex/wedge elements. Enter the convection template ID. The template identified by this ID will be used in calculating the convective heat transfer coefficient. Enter geometric properties The number of geometric properties required will vary with the convection configuration used. Geometric property 1 is taken from MSC.Patran. Usage: Convection elements may be used to represent convection between a wall and a series of fluid nodes such as an advection stream. This provides more precise modeling, but is generally more difficult to set up than a 2-application region Convection LBC. This Element Properties input form appears when the following options have been selected:

29 PAT312, Section 36, December 2006 S36-29 Copyright 2007 MSC.Software Corporation ORTHOTROPIC ELEMENT PROPERTIES

30 PAT312, Section 36, December 2006 S36-30 Copyright 2007 MSC.Software Corporation ORTHOTROPIC MATERIAL PROPERTIES ENHANCEMENTS l Coordinate options l Global l Elemental l Alternate coordinate frame l Rectangular l Cylindrical l Rotations relative to Refer. Coord system l Spatial Fields functions l Applicable to 2D and 3D elements l Display Material axis Elemental Cylindrical CID

31 PAT312, Section 36, December 2006 S36-31 Copyright 2007 MSC.Software Corporation l Previous to 2004 only Eulerian angle orientation was available l Separate Property set required for each orientation l Introduced in MSC.Patran 2004 l CID l Uses user created alternate coordinate frame l Global l The global X,Y,Z coordinate system l Elemental l Element parametric coordinate systems l Additional orientation angles can be added to each type ORTHOTROPIC MATERIAL PROPERTIES ENHANCEMENTS (Cont.)

32 PAT312, Section 36, December 2006 S36-32 Copyright 2007 MSC.Software Corporation INPUT SHELL OR SOLID PROPERTIES l Orientation can reference an alternate coordinate system such as cylindrical l Kxx along axis 1 (radial), Kyy along axis 2 (theta) and Kzz along axis 3 (Z) l Elemental option applies to structured meshes with a consistent elemental orientation l Enter material name or MID l Orientation options l CID, String, Global & Elemental l Optional additional rotations l Angles about axes of selected coordinate system l Shell thickness l Required for shell property

33 PAT312, Section 36, December 2006 S36-33 Copyright 2007 MSC.Software Corporation CYLINDRICAL COORDINATE SYSTEM l Select CID type l Select Coord 1 l Cylindrical coordinate system l Apply additional 45 deg rotation about axis 1 (radial)

34 PAT312, Section 36, December 2006 S36-34 Copyright 2007 MSC.Software Corporation SHOW CALCULATED ORIENTATION l Verify orientations using Property, Show l Select Mat. Coord. Sys. (Calculated)

35 PAT312, Section 36, December 2006 S36-35 Copyright 2007 MSC.Software Corporation ELEMENTAL COORDINATE SYSTEM l Elemental coordinate shown with no additional rotations l Default element axis system can be shown: l Elements/Show/Element/Coord Sys l Definition = MSC.Nastran

36 PAT312, Section 36, December 2006 S36-36 Copyright 2007 MSC.Software Corporation