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Surface edit : Defeature (definition)

      • Defeature
         - Surface에 존재하는 hole, surface fillet, edge fillet 등을 손쉽게 수정할 수 있는 기능


      • 실행
         - Menu bar > Geometry > defeature 선택




      • Sub-panel list (summary)
         - Pinholes : surface에 포함된 hole을 찾아서 제거, 수정된 hole은 중심부에 fixed point가 생성됨
         - Surf fillet : surface fillet 부분을 찾아서 수정
         - Edge fillet : surface edge의 fillet을 찾아서 수정
         - Duplicate : Duplicate 된 surface를 찾아서 삭제
         - Symmetry : 단일 component내에서 symmetry된 surface를 찾고, reorganize 또는 delete




Altair Proprietary and Confidential Information               Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (pinholes)

      • Pinholes panel
         - Surface가 가지는 hole을 찾고, 삭제하는 기능
         - Diameter < field에 입력된 값 보다 작은 직경을 가지는 hole을 찾음
         - Pinholes이 제거된 위치에는 Fixed point가 자동으로 생성됨
              • Mesh 생성시에 영향을 주기 때문에 불 필요 시 삭제 (quick edit)




                      Surf




                                                                                            Hole 제거 후 fixed
                                                                                              point 자동생성




Altair Proprietary and Confidential Information          Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (surf fillets)

      • Detect Surface Fillets panel : 조건에 맞는 surface fillet을 찾음
                                                            을
         - Find fillets by profiles : Geometry의 surface line을 선택하여 surface fillet을 찾음
         - Find fillets in selected : 선택한 surface에서 최대 최소 반경내에 있는 surface fillet을 찾음




      • Remove surface fillets : 찾아진 surface fillet을 삭제하고 자동으로 수정
                                                   을
         - Detect surface fillets panel에서 find 버튼을 클릭하면 자동으로 해당 panel로 이동함
         - Fillets to remove : surface를 선택하고 remove 버튼을 클릭하여 수정
         - Ignore edge assoc : 선택된 line을 surface edge로 가지는 fillet은 제거되지 않게 하는 기능
         - Fillet ends : surface fillet을 제거할 범위를 지정




Altair Proprietary and Confidential Information                      Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (surf fillets-example)

      • Process
          1. Line 또는 Surface 선택
              • find fillets in selected에서 surface를 모두 선택하고, 최대 최소 반경 값을 입력 (Ex. min radius = 1, max radius
                = 15)하고 find를 클릭
              • 선택 해제 : surface를 마우스 3번으로 클릭




Altair Proprietary and Confidential Information                   Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (surf fillets-example)

          2. Remove 버튼을 클릭하면 선택된 surface fillet이 제거됨
                                               이




Altair Proprietary and Confidential Information   Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (Edge fillets)

      • Replace planar surface edge fillets




         - Min, Max radius : fillet을 찾기 위한 최소/최대 반경을 정의


         - Min angle : minimum angle allowed at the interior angle formed by the intersection of the tangents to the edges
           calculated at the start and end of the fillet


         - All(default), fillets, rounds : 찾고자 하는 edge의 type을 정의


         - Trim – intersect : 선택한 node 사이에 존재하는 fillet을 제거




Altair Proprietary and Confidential Information                            Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (Edge fillets : example)

      • General Process
          1. edge fillet을 가지는 surface를 선택 (전체 surface의 경우 by display로 선택)
          2. Min/max radius, min angle을 그림과 같이 입력하고, type을 all(default) 로 선택
          3. Find 버튼                    을 클릭하면 정의한 수의 조건에 맞는 fillet이 찾아짐 (F : fillet, R : round)
          4. Remove 버튼                       을 클릭하면 edge fillet이 삭제됨

                                                                                                              < Self-intersection >


              Surf


                                                           Find edge fillet

                                          Surf
                                                                                                             1                            2




                                                                Remove




Altair Proprietary and Confidential Information                               Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (duplicates)

      • Find and delete duplicate surfaces




         - 선택된 surface에서 서로 중복된 surface를 찾고 삭제하는 기능
         - Cleanup tol : surface간의 허용 오차를 정의
         - Process : surface 선택 (왼쪽 그림) > find 클릭 (오른쪽 그림) > delete 버튼 클릭하여 중복 surface 삭제




                                                                                                중복 surface를 삭제
                                                                                                          를




      찾고자 하는 Surface 선택




Altair Proprietary and Confidential Information             Copyright © 2008 Altair Engineering, Inc. All rights reserved.
Surface edit : Defeature (symmetry)

      • Find symmetrical surfaces




         - Symmetry 형상을 mesh하기 위해서 symmetry surface를 찾고, 새로운 component로 organize 하거나 삭제하는
           기능을 수행
         - Find symmetry : 단일 component내에서 user가 정의한 symmetry plane에 따라 symmetry surface를 찾음
         - Compare : 다른 component 사이에 있는 symmetry surface를 찾음
         - Reorganize : 찾아진 symmetry surface를 새로운 component로 reorganize
         - Delete positive : 선택한 축을 normal로 갖는 평면 (x축의 경우 y-z plane)의 positive 방향의 surface 삭제
         - Delete negative : Delete positive와는 반대로 negative 방향의 surface 삭제




Altair Proprietary and Confidential Information                  Copyright © 2008 Altair Engineering, Inc. All rights reserved.

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Defeature hm10

  • 1. Surface edit : Defeature (definition) • Defeature - Surface에 존재하는 hole, surface fillet, edge fillet 등을 손쉽게 수정할 수 있는 기능 • 실행 - Menu bar > Geometry > defeature 선택 • Sub-panel list (summary) - Pinholes : surface에 포함된 hole을 찾아서 제거, 수정된 hole은 중심부에 fixed point가 생성됨 - Surf fillet : surface fillet 부분을 찾아서 수정 - Edge fillet : surface edge의 fillet을 찾아서 수정 - Duplicate : Duplicate 된 surface를 찾아서 삭제 - Symmetry : 단일 component내에서 symmetry된 surface를 찾고, reorganize 또는 delete Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 2. Surface edit : Defeature (pinholes) • Pinholes panel - Surface가 가지는 hole을 찾고, 삭제하는 기능 - Diameter < field에 입력된 값 보다 작은 직경을 가지는 hole을 찾음 - Pinholes이 제거된 위치에는 Fixed point가 자동으로 생성됨 • Mesh 생성시에 영향을 주기 때문에 불 필요 시 삭제 (quick edit) Surf Hole 제거 후 fixed point 자동생성 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 3. Surface edit : Defeature (surf fillets) • Detect Surface Fillets panel : 조건에 맞는 surface fillet을 찾음 을 - Find fillets by profiles : Geometry의 surface line을 선택하여 surface fillet을 찾음 - Find fillets in selected : 선택한 surface에서 최대 최소 반경내에 있는 surface fillet을 찾음 • Remove surface fillets : 찾아진 surface fillet을 삭제하고 자동으로 수정 을 - Detect surface fillets panel에서 find 버튼을 클릭하면 자동으로 해당 panel로 이동함 - Fillets to remove : surface를 선택하고 remove 버튼을 클릭하여 수정 - Ignore edge assoc : 선택된 line을 surface edge로 가지는 fillet은 제거되지 않게 하는 기능 - Fillet ends : surface fillet을 제거할 범위를 지정 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 4. Surface edit : Defeature (surf fillets-example) • Process 1. Line 또는 Surface 선택 • find fillets in selected에서 surface를 모두 선택하고, 최대 최소 반경 값을 입력 (Ex. min radius = 1, max radius = 15)하고 find를 클릭 • 선택 해제 : surface를 마우스 3번으로 클릭 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 5. Surface edit : Defeature (surf fillets-example) 2. Remove 버튼을 클릭하면 선택된 surface fillet이 제거됨 이 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 6. Surface edit : Defeature (Edge fillets) • Replace planar surface edge fillets - Min, Max radius : fillet을 찾기 위한 최소/최대 반경을 정의 - Min angle : minimum angle allowed at the interior angle formed by the intersection of the tangents to the edges calculated at the start and end of the fillet - All(default), fillets, rounds : 찾고자 하는 edge의 type을 정의 - Trim – intersect : 선택한 node 사이에 존재하는 fillet을 제거 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 7. Surface edit : Defeature (Edge fillets : example) • General Process 1. edge fillet을 가지는 surface를 선택 (전체 surface의 경우 by display로 선택) 2. Min/max radius, min angle을 그림과 같이 입력하고, type을 all(default) 로 선택 3. Find 버튼 을 클릭하면 정의한 수의 조건에 맞는 fillet이 찾아짐 (F : fillet, R : round) 4. Remove 버튼 을 클릭하면 edge fillet이 삭제됨 < Self-intersection > Surf Find edge fillet Surf 1 2 Remove Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 8. Surface edit : Defeature (duplicates) • Find and delete duplicate surfaces - 선택된 surface에서 서로 중복된 surface를 찾고 삭제하는 기능 - Cleanup tol : surface간의 허용 오차를 정의 - Process : surface 선택 (왼쪽 그림) > find 클릭 (오른쪽 그림) > delete 버튼 클릭하여 중복 surface 삭제 중복 surface를 삭제 를 찾고자 하는 Surface 선택 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.
  • 9. Surface edit : Defeature (symmetry) • Find symmetrical surfaces - Symmetry 형상을 mesh하기 위해서 symmetry surface를 찾고, 새로운 component로 organize 하거나 삭제하는 기능을 수행 - Find symmetry : 단일 component내에서 user가 정의한 symmetry plane에 따라 symmetry surface를 찾음 - Compare : 다른 component 사이에 있는 symmetry surface를 찾음 - Reorganize : 찾아진 symmetry surface를 새로운 component로 reorganize - Delete positive : 선택한 축을 normal로 갖는 평면 (x축의 경우 y-z plane)의 positive 방향의 surface 삭제 - Delete negative : Delete positive와는 반대로 negative 방향의 surface 삭제 Altair Proprietary and Confidential Information Copyright © 2008 Altair Engineering, Inc. All rights reserved.