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PrePoMaxの使い方 モーダル解析

JunTatsuno
January 26, 2020

PrePoMaxの使い方 モーダル解析

JunTatsuno

January 26, 2020
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  1. 1 PrePoMax ͷ࢖͍ํ Ϟʔμϧղੳ OpenCAE ݚڀձʢJapan OpenCAE Working Groupʣ 2020

    ೥ 1 ݄ 26 ೔ ໨࣍ 1 ͸͡Ίʹ 1 2 ղੳํ๏ 2 3 ୯७Ϟσϧͷղੳ 2 3.1 ܗঢ়ͷΠϯϙʔτ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.2 ϝογϡͷ࡞੒ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.3 ৚݅ઃఆ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.4 ࡐྉͷઃఆ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.4.1 ࡐྉ෺ੑ஋Λఆٛ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.4.2 ࡐྉΛׂΓ౰ͯ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.5 ղੳ৚݅ͷઃఆ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.6 ղੳͷ࣮ߦ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.7 ݁Ռͷ֬ೝ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.8 ݁Ռͷݕূ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1 ͸͡Ίʹ ߏ଄෺Λઃܭ͢Δ৔߹ɺߏ଄෺ͷݻ༗ৼಈ਺͕ɺͲ͜ʹ͋Δͷ͔ɺ·ͨɺͦͷप೾਺Ͱڧৼͨ͠৔ ߹ɺͲͷΑ͏ͳܗঢ়Ͱڧৼ͍ͯ͠Δͷ͔͕໰୊ʹͳΔ͜ͱ͕͋Γ·͢ɻڧৼͯ͠ߏ଄෺͕ഁյͨ͠৔ ߹ɺ͜ΕΒͷ͜ͱ͕൑Ε͹ରࡦ͕ͱΕ·͢ɻ͜ͷͨΊɺ͜͜Ͱݻ༗ৼಈ਺ͱมܗͷܗঢ়Λղੳ͢Δํ ๏ʢϞʔμϧղੳʣΛࣔ͠·͢ɻ ͜ͷࢿྉ͸Φʔϓϯ CAE ษڧձˏذෞͰެ։͞Ε͍ͯΔ FS ࢯ͝ఏڙͷʮSALOME-Meca ͷ࢖ ༻๏ղઆɿ10.0 ϞʔμϧղੳʯΛ PrePoMaxʢCalculixʣ༻ʹ࡞Γ௚ͨ͠΋ͷͰ͢ɻ
  2. 3 ୯७Ϟσϧͷղੳ 2 ղੳํ๏ ୯७ͳย࣋ͪྊͷϞσϧΛಡΈࠐΈɺยଆ୺໘Λݻఆͨ͠৔߹ͷݻ༗ৼಈ਺Λ֬ೝ͠·͢ɻߴ࣍ͷ ݻ༗ৼಈ਺·ͰؚΊΔͱࡍݶ͕ແ͍ͷͰɺ5kHz ·Ͱͷݻ༗ৼಈ਺ΛٻΊΔ͜ͱʹ͠·͢ɻݻ༗ৼಈ ਺ΛٻΊͨޙɺ݁Ռ͕ཧ࿦ղͱ͍͋ͬͯΔ͔ɺͲ͏͔ͷݕূΛߦ͍·͢ɻ 3 ୯७Ϟσϧͷղੳ

    ย࣋ͪྊͷ୯७ϞσϧͰղੳΛߦ͍·͢ɻ PrePoMax Λىಈ͠·͢ɻ 3.1 ܗঢ়ͷΠϯϙʔτ ϝχϡʔόʔΑΓɺ ʮFileʯ ʼ ʮImportʯ Ͱɺ ʮbar-100x20x10.stpʯ ΛΠϯϙʔτ͠·͢ɻ ʮGeometryʯ λϒͷ Parts ͷԼʹʮSolid Part-1ʯ͕௥Ճ͞Ε·͢ɻ ਤ 1 ܗঢ়ͷΠϯϙʔτ 3.2 ϝογϡͷ࡞੒ ʮGeometryʯ λϒͷ ʮSolid Part-1ʯ Λબ୒͠ɺ ӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷத͔Βɺ ʮMeshing ParametersʯΛબ୒͠·͢ɻProperties Ͱϝογϡ෼ׂઃఆΛߦ͍·͢ɻ ʮOKʯΛΫϦοΫͯ͠΢Ο ϯυ΢Λด͡·͢ɻ 2
  3. 3 ୯७Ϟσϧͷղੳ 3.2 ϝογϡͷ࡞੒ ਤ 2 Edit Meshing Parameters ʮGeometryʯ

    λϒͷ ʮSolid Part-1ʯ Λબ୒͠ɺ ӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷத͔Βɺ ʮCreate meshʯΛબ୒͠·͢ɻ ϝογϡ͕࡞੒͞Εɺ ʮFE ModelʯλϒʹҠΓ·͢ɻ࡞੒͞Εͨϝογϡʹ ໰୊͕͋Ε͹ɺ ʮGeometryʯλϒʹ໭Γɺϝογϡ෼ׂઃఆ͔Βɺ΍Γ௚͍ͯͩ͘͠͞ɻ ਤ 3 ϝογϡͷ࡞੒ 3
  4. 3.3 ৚݅ઃఆ 3 ୯७Ϟσϧͷղੳ 3.3 ৚݅ઃఆ ࡞੒͞Εͨϝογϡʹɺݻఆ৚݅༻ͷ໘άϧʔϓΛ࡞੒͠·͢ɻ ʮFE ModelʯλϒͷʮModelʯπ Ϧʔ͔Βɺ

    ʮSurfacesʯΛબ୒͠ɺӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷத͔Βɺ ʮCreateʯΛબ୒͠· ͢ɻProperties ಺ͷʮNameʯΛʮfixʯʹ͠·͢*1ɻ ʮSelect itemsʯͷʮEmptyʯΛબ୒͠ɺͦͷӈ ԣʹݱΕΔʮ. . . ʯΛબ୒͠·͢ɻ ਤ 4 Create Surface ʮSet selectionʯ΢Οϯυ΢Ͱɺ ʮDaraʯʼʮGeometry based selectionʯͷத͔Βɺ ʮSurface, edges and verticesʯʹνΣοΫΛೖΕ͍ͯͩ͘͞ɻ *1 σϑΥϧτ͸ Surface-1 Ͱ͢ɻ 4
  5. 3 ୯७Ϟσϧͷղੳ 3.3 ৚݅ઃఆ ਤ 5 Set selection ϝΠϯ΢Οϯυ΢ͷϝογϡ͔Β໨తͷ໘Λબ୒͠·͢ɻ੺͘ڧௐදࣔ͞Εͨ໘ʹ໰୊ͳ͚Ε͹ ʮOKʯΛΫϦοΫͯ͠ʮSet

    selectionʯ΢Οϯυ΢Λด͡ɺ͞ΒʹʮOKʯΛΫϦοΫͯ͠ʮCreate Surfaceʯ΢Οϯυ΢Λด͡·͢ɻ ਤ 6 ϝογϡͷ֬ೝ 5
  6. 3.4 ࡐྉͷઃఆ 3 ୯७Ϟσϧͷղੳ 3.4 ࡐྉͷઃఆ 3.4.1 ࡐྉ෺ੑ஋Λఆٛ ࡐྉ෺ੑ஋Λఆٛ͠·͢ɻ ʮFE

    Modelʯ λϒͷ ʮModelʯ πϦʔ͔Βɺ ʮMaterialʯ Λબ୒͠ɺ ӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔ ͷத͔Βɺ ʮCreateʯ Λબ୒͠·͢ɻ ʮMaterial nameʯ Λ ʮCuʯ ʹ͠·͢ɻʮAvailable modelsʯ ͷத ͔Βɺ ʮDessityʯ Λબ୒͠ɺ ӈ໼ҹϘλϯΛԡ͠·͢ɻ ʮDessityʯ ͷ஋ʹ ʮ8.96E-09 ʢTonne/mm3ʣ *2ʯ Λೖྗ͠·͢ɻ ਤ 7 ີ౓ͷઃఆ ಉ༷ʹɺ ʮAvailable modelsʯͷத͔Βɺ ʮElasticʯΛબ୒͠ɺӈ໼ҹϘλϯΛԡ͠·͢ɻ ʮYoung’s modulusʯͷ஋ʹʮ132000ʢMPaʣ ʯΛɺ ʮPoisson’s ratioʯͷ஋ʹʮ0.343ʯΛೖྗ͠·͢ɻ ʮOKʯ ΛΫϦοΫͯ͠ʮCreate Surfaceʯ΢Οϯυ΢Λด͡·͢ɻ *2 ີ౓ͷ୯Ґ͕ Tonne/mm3 ʹͳ͍ͬͯΔ͜ͱʹ஫ҙ͍ͯͩ͘͠͞ 6
  7. 3 ୯७Ϟσϧͷղੳ 3.4 ࡐྉͷઃఆ ਤ 8 ஄ੑࡐྉఆ਺ͷઃఆ 3.4.2 ࡐྉΛׂΓ౰ͯ ղੳର৅ʹࡐྉ෺ੑ஋Λఆٛͨ͠ࡐྉΛׂΓ౰ͯ·͢ɻ

    ʮFE Modelʯ λϒͷ ʮModelʯ πϦʔ͔Βɺ ʮSectionsʯ Λબ୒͠ɺ ӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔ ͷத͔Βɺ ʮCreateʯΛબ୒͠·͢ɻ ʮMaterialʯʹʮCuʯ ɺ ʮPartʯʹʮSolid Part-̍*3ʯׂ͕Γ౰ͯ ΒΕ͍ͯΔ͜ͱΛ֬ೝ͍ͯͩ͘͠͞ɻࡐྉͷׂΓ౰ͯʹ໰୊ͳ͚Ε͹ʮOKʯΛΫϦοΫͯ͠ʮCreate Sectionʯ΢Οϯυ΢Λด͡·͢ɻ *3 σϑΥϧτͷ৔߹ 7
  8. 3.5 ղੳ৚݅ͷઃఆ 3 ୯७Ϟσϧͷղੳ ਤ 9 Create Section 3.5 ղੳ৚݅ͷઃఆ

    ʮFE ModelʯλϒͷʮModelʯπϦʔ͔ΒʮstepʯΛબ୒͠ɺӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷ த͔Βɺ ʮCreateʯΛબ୒͠·͢ɻ ʮCreate Stepʯ΢Οϯυ΢ͷ Type ͔Βɺ ʮFrequency stepʯΛબ ୒͠·͢ɻProperties ಺ͰʮNumber of frequenciesʯͷ஋ʹʮ5ʯΛೖྗ͠·͢*4ɻ ʮOKʯΛΫϦο Ϋͯ͠ʮCreate Stepʯ΢Οϯυ΢Λด͡·͢ɻ *4 σϑΥϧτͰ͸ʮ10ʯͰ͢ɻ 8
  9. 3 ୯७Ϟσϧͷղੳ 3.5 ղੳ৚݅ͷઃఆ ਤ 10 Create Step ʮFE ModelʯλϒͷʮModelʯπϦʔ͔Βɺ

    ʮBCsʯΛબ୒͠ɺӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷ த͔Βɺ ʮCreateʯΛબ୒͠·͢ɻProperties ಺ͰʮSurfaceʯ͕ʮfixʯͰ͋Δ͜ͱ֬ೝ͠·͢ɻDOF ʢࣗ༝౓ʣͷ U1ʢX ํ޲มҐʣ ɺU2ʢY ํ޲มҐʣ ɺU3ʢZ ํ޲มҐʣͷ஋Λʮ0ʯʹ͠·͢ɻOK Λ ΫϦοΫͯ͠ʮCreate Boundary Conditionʯ΢Οϯυ΢Λด͡·͢ɻ 9
  10. 3.5 ղੳ৚݅ͷઃఆ 3 ୯७Ϟσϧͷղੳ ਤ 11 Create Boundary Condition ʮFE

    ModelʯλϒͷʮAnalysesʯΛબ୒͠ɺӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷத͔Βɺ ʮCreateʯ Λબ୒͠·͢ɻData ಺ͰʮNameʯΛʮModalʯʹมߋ͠·͢*5ɻ ʮOKʯΛΫϦοΫͯ͠ʮCreate Analysesʯ΢Οϯυ΢Λด͡·͢ɻ *5 σϑΥϧτͰ͸ Analysis-1 Ͱ͢ɻ 10
  11. 3 ୯७Ϟσϧͷղੳ 3.6 ղੳͷ࣮ߦ ਤ 12 Edit Analysis Modal 3.6

    ղੳͷ࣮ߦ ʮFE ModelʯλϒͷʮModalʯΛબ୒͠ɺӈΫϦοΫͰදࣔ͞ΕΔϝχϡʔͷத͔Βɺ ʮRunʯΛ બ୒͠·͢ɻ ʮMonitorʯ΢Οϯυ΢͕දࣔ͞Εɺ ʮOutputʯλϒͷதͰɺJob finished ͱදࣔ͞Ε ͨΒղੳ͕ऴྃͰ͢ɻ ਤ 13 Monitor 11
  12. 3.7 ݁Ռͷ֬ೝ 3 ୯७Ϟσϧͷղੳ 3.7 ݁Ռͷ֬ೝ ʮMonitorʯ΢Οϯυ΢ͷʮResultsʯΛΫϦοΫ͢Δͱղੳ݁Ռ͕ಡΈࠐ·Εɺ ʮResultsʯλϒʹҠ Γ·͢ɻ݁Ռ͸ɺ࣍ਤͷΑ͏ʹಘΒΕ·͢ɻมҐͷਤͰ͕͢ɺมҐͷઈର஋͸ҙຯΛ͍࣋ͬͯͳ͍ͷ Ͱ஫ҙ͍ͯͩ͘͠͞ɻ·ͨɺ݁ՌతʹʮStep,Increment=1,5ʯͰ࠷େ

    7685.6kHz ·Ͱͷݻ༗ৼಈ͕ ٻ·͍ͬͯ·͢ɻ5kHz ·Ͱͷݻ༗ৼಈ਺ΛٻΊΑ͏ͱ͍ͯͨ͠ͷͰɺ ʮStep,Increment=1,3ʯͰ໨ త͸ୡ͍ͯ͠·ͨ͠ɻ ਤ 14 5 ࣍ʣ7685.6Hz มܗͷܗঢ় ਤ 15 1 ࣍ʣ1102.9Hz ਤ 16 2 ࣍ʣ1339.4Hz 12
  13. 3 ୯७Ϟσϧͷղੳ 3.8 ݁Ռͷݕূ ਤ 17 3 ࣍ʣ6352.5Hz ਤ 18

    4 ࣍ʣ7163.6Hz 3.8 ݁Ռͷݕূ લ߲ͷ݁ՌΛཧ࿦ղͱൺֱͯ͠Έ·͢ɻ͸Γͷੇ๏͸ɺ100x20x10mmɻཧ࿦ܭࢉͱ CAE ղੳ݁ ՌΛൺֱ͢Δͱɺ࣍දͷΑ͏ʹͳΓ·͢ɻ ද 1 CAE ղੳ݁Ռͱཧ࿦ղ ۠෼ 1 ࣍ 2 ࣍ 3 ࣍ CAE ղੳ݁Ռ 1,103 1,339 6,352 ཧ࿦ղ 622 1,242 3,885 ݁Ռ͸ɺগ͠ҟͳ͍ͬͯ·͢ɻ͜ͷͨΊɺ࠶౓ϝογϡΛࡉ͔ͯ֬͘͠ೝ͠·͢ɻϝογϡ͸ɺఆ ྔతʹݕ౼ΛՃ͑ΔͨΊɺ ʮMax element sizeʯΛઃఆͯ͠ɺಉ࢛͡໘ମͷϝογϡΛ੾Δ͜ͱʹ͠· ͢ɻ࠶౓ܭࢉͨ݁͠Ռ͕࣍දͰ͢ɻཧ࿦ղͱ͸ɺ΍͸Γগͣ͠Ε͍ͯ·͢ɻཧ࿦ղ͸ɺݫີʹ YZ ํ ޲ͷมܗϞʔυ͔͠ߟ͍͑ͯ·ͤΜ͕ɺ͜ͷϞʔμϧղੳ͸ɺશํҐܭࢉ͍ͯ͠·͢ɻ2 ࣍ϝογϡ Ͱ͸ɺϝογϡͷେ͖͞Λม͑ͯ΋ɺ΄ͱΜͲޡ͕ࠩൃੜ͍ͯ͠·ͤΜʢղ͕ऩଋ͍ͯ͠·͢ʣ ɻҎ ্Λߟ͑ΔͱɺCAE ݁Ռͷํ͕ਖ਼͍͠ͱ΋ࢥ͑·͢ɻ ·ͨɺ2 ࣍ཁૉͷํ͸ɺઢܗཁૉʹൺ΂ͯޡࠩ΋গͳ͘ɺૈ͍ϝογϡͰ΋ɺͦͦ͜͜ܭࢉͰ͖ͯ ͍Δ͜ͱ͕ɺΘ͔Γ·͢ɻ͜ͷҝɺϞʔμϧղੳͰ͸ɺ2 ࣍ϝογϡΛ࢖͏ͱϝογϡ͕ૈͯ͘΋ਫ਼ ౓ྑ͘ɺղΛٻΊΔ͜ͱ͕Ͱ͖ͨ͜ͱ͕ɺΘ͔Γ·͢ɻ ද 2 ղੳ݁Ռ Max element size ཁૉ਺ ઢܗཁૉ 2 ࣍ཁૉ 1 ࣍ 2 ࣍ 3 ࣍ 1 ࣍ 2 ࣍ 3 ࣍ 5(mm) 631 1,057 1,327 5,953 625 1,215 3,753 4(mm) 1,325 859 1,302 4,927 624 1,214 3,740 3(mm) 4,505 687 1,252 4,067 623 1,212 3,751 2(mm) 9,852 664 1,237 3,972 622 1,212 3,727 13