內(nèi)容教程教案06-hypermorph mr april

1、1Altair HyperWorks 12.0Pre-Post Processing for Finite Element Analysis (HyperMesh + HyperView)HYPERMORPHTrainers NameMonth XX, 2012Chapter 6: HyperMorphHyperMorphIntroduction to Morphing TechnologyFree HandsDomains and HandlesMorph VolumesMap to GeometryQuestions & Answers2HyperMorph IntroductionMor

2、phing technologyallows a mesh based parameterization of finite element structuresgoes without geometryshape modification is applied directly to the meshWhat is HyperMorph?Mesh morphing module in HyperMesh that allows you to morph an FE model in useful, logical, and intuitive ways which result in min

3、imal element distortion.3HyperMorph ApplicationsRapidly change geometry of existing model interactively or parametricallyMap an existing mesh onto a new geometryGenerate and edit shape variables for optimizationHyperMorph Introduction4“HyperMorph” Module From the menu bar, go to Morphing, and select

4、 the appropriate function:On the Tool page click on HyperMorph, and click on the appropriate panelHyperMorph HighlightsFreehand morphing: Direct morphing of the mesh without any morphing entitiesMorph Volumes: Efficient setup of morphing for complex FEA modelsSection Morphing: Map to new design line

5、s using line differenceMorphing Constraints: Preserve model attributes while morphingMorphing Shapes: Transfer morphing between different meshesHyperMorph Methods HYPERMORPHMorph VolumeMorph Domains & HandlesMap to GeometryFreehand MorphingGlobal: ideal for space frames. Handles can be used to alter

6、 the shape of the model while stretching or compacting the mesh between the handles.Local: This method is ideal for parametric changes. It creates a domains and handles for the mesh, used to change lengths, angles, radii, and arc angles as well as more general shape changes.This method is ideal for

7、making simple changes to complex models. It encloses the mesh in one or more deformable 3-D blocks. Each block is a morph volume and governs the movement of the mesh within its boundaries. Thus, by changing the shapes of the blocks, you can change the shape of the mesh.This method is ideal for Morph

8、 parts of the model to fit selected lines, planes, surfaces, meshes, functions, interpolated surfaces, and section linesas well as applying line differences, surface differences, and normal offsets to the model.ideal for new users and for making arbitrary, rapid, and custom changes. This method appl

9、ies morphing directly to the mesh without needing any additional entities (such as domains or morph volumes) set up first.56Morphing EntitiesHandles controls model shape during morphingDomains divides a model into regions (for domain based morphing)Morph volume A cube shaped volume that morphs all e

10、ntities that are located inside the shape (for volume based morphing)Constraints Control the motion of nodes during morphingSymmetries forces regions to be morphed symmetricallyShapes model state during morphing saved for retrieval at a later pointSymmetriesHandlesDomainsMorph VolumeHyperMorph Entit

11、iesHyperMorph Free Hand7Morphing Free HandsUse this panel to morph your mesh without needing domains, handles, or morph volumes.Separate options exist for moving selected nodes directly, recording actions made in otherpanels, sculpting meshes with different virtual tools, and saving a morph as a sha

12、pe.The freehand panel consists of several subpanels: move nodes, record, sculpting, andsave shape.Changes made on one subpanel do not affect the others, and are persistent so that you can switch freely between subpanels without losing any settings already made.Exercise 6a (Manual Page 241): Free Han

13、ds MorphingFile Name and Location: Model FilesCHAPTER-6-HYPERMORPH06a-PROPELLER-FREE-HANDS.hmObjectives:Use Free Hands: Translating Nodes to Increase the Length of a Propeller BladeDo-it-yourself8HyperMorph Domains & Handles How does Morphing workMesh Model is divided into domainsHandles are placed

14、at domain boundariesDomain shape is controlled by attached handlesHandle movements change domain shapes, which in turn move nodes within domainsGlobal handles affect entire modelLocal handles only affect parent and neighboring domainsMap to geometry9HyperMorph Domains & HandlesDomains and handles ar

15、e divided into two basic groups, global and local. Global domain encloses the entire model in an imaginary box with eight global handles at the corners of the box and one handle at the center of the box. Every node in the model is part of the global domain and thus, movement of global handle influen

16、ce nodes of the entire model.NOTE: The intent of global domain and handles are to make large scale shape changes to the model. Local domain is further divided into four different types of domains:- 1D domain- 2D domain-3D domain- edge domainThese local handles can only influence the nodes contained

17、in the domains they are associated with. 10Morphing Create DomainsHandle : pany each domain and provide the mechanism to modify shape of a meshHandle influence : describe how a movement of a handle relate to nodal movements.Global handle : only exist in global domain. Movement of a global handle can

18、 affect every node within a model. It allows a large scale shape change.Local handle : only exist in local domains. Any local handle can only influence nodes contained in the local domains they are associated with. It is used for local shape changes.Global morphing : morphing using global domains an

19、d global handles.Local morphing : morphing using local domains and local handles.11HyperMorph Domains & HandlesMorphing Create HandlesDomain angle : the angle between the normal vectors between two elements. When the value is exceeded, a partition break is confirmed and a new domain will be created

20、with an edge running between the two elements.Curve tolerance : a parameter used to decide if a mesh geometric feature is straight or curve. Similar to domain angle, a partition is performed when the value is exceeded.Partition : a HyperMorph term to logically divides a 2D domian into smaller 2D dom

21、ains based on the values of domain angle and curve tolerance.12morphface : 2D elements on the faces of each 3D domain and placed into a morphface component. Any morphing operation on those face elements within morphface influences underneath solid elements. Essentially, to morph solid elements is to

22、 morph elements within morphface.Constraints : a HyperMorph feature to restrict the movement of nodes during morphing operations.HyperMorph Domains & HandlesDependency : a HyperMorph feature which can be used to build relationships among handles. Multiple layers of dependency is supported.Independen

23、t handle : the handle is only morphed by its own movement and independent from other handle movement.Dependent handle : the handle is affected by the movement of its associated independent handle.13Local handle dependencyGlobal handle dependencyHyperMorph Domains & Handles14HyperMorph Domains&Handle

24、s - TerminologyMorph interactively by dragging handles across graphics areaRotate a meshTranslate a handle to a coordinateTranslate a handle to a nodeMorphing Morph move handlesPerform morphing operation by move handles15HyperMorph Domains&Handles - Move Handlesalter dimension (angle)alter dimension

25、 (distance)alter dimension (radius)alter dimension (curvature)Morphing Morph alter dimensionsPerform morphing operation by alter dimension16HyperMorph Domains&Handles Alter DimensionsMorphing Morph set biasingChange the biasing factors associated with each handle17HyperMorph Domains&Handles Set Bias

26、ingMorphing Morph set constraintsfix certain nodes in placeso that they do not moveduring a morph. 18HyperMorph Domains&Handles Set ConstraintsMorphing Morph save shapeThe save shape sub-panel allows you to save the active morph as a shape entityHandle and Node Perturbations: You can save a shape as

27、 either handle or node perturbations. The difference es important when the model is reparameterized or when domains, handles, and symmetries are created or deleted. When a shape is saved as node perturbations, it always has the same shape no matter what changes occur with the morphing entities. If t

28、he shape is saved as handle perturbations, changes in the relationships between handles and nodes will alter the resultant node perturbations when the shape is reapplied. 19HyperMorph Domains&Handles ShapesThe Apply Shapes sub-panel allows you to saved shapes to the current mesh. This feature is a l

29、imited version of the apply shapes sub-panel located in the shapes panel.Apply Shape Morphing Morph apply shape Morphing Morph morph surfacesMorph the surfaces in the model to adhere to any morphing of mesh nodes that were previously associated with them. 20HyperMorph Domains&Handles Morph SurfacesT

30、he user sets up a 1 plane symmetry condition. When a handle is moved on one side, the corresponding handle on the other side is move to maintain the symmetry.Symmetry 1 PlaneThe user sets up a circular symmetry condition. When a handle is moved, it acts on the mesh as if it were circular.Symmetry Ci

31、rcularSymmetry Cyclical21HyperMorph Domains&Handles SymmetryPerform morphing operation by symmetry: Morphing Create Symmetries Exercise 6b (Manual Page 253): Morphing Domains and HandlesFile Name and Location: Model FilesCHAPTER-6-HYPERMORPH06b-DOMAINS-HANDLES.hmObjectives:Use Domains & Handles: Cre

32、ate domains and handles,Morph the modelDo-it-yourself22HyperMorph Morph VolumesHyperMorph Define Variables: Morphing Create Morph Volumes Morph volume is a new technique to easily morph a model while maintaining tangency. This morphing technique involves creation of a closed box(es) called morph vol

33、ume with control points known as handles created at the corners and on the edges of the morph volume.Morph volumes envelope the whole rear suspensionto move it backwards 23via Matrixvia hexa convert24HyperMorph Morph VolumesHyperMorph Define Variables: Morphing Create Morph Volumes Exercise 6c (Manual Page 263): Morph VolumesFile Name and Location: Model FilesCHAPTER-6-HYPERMORPH06c-MORPH-VOLUMES