ansys高性能计算

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1、AGuidetoEfficientlyObtainingSolutionsinANSYSHowtogofrommodeltoresultsinrecordtime!PhilErisman–SimuTechGroupSimuTechGroupProfile72+EmployeesFocus:Objectives:14LocalOfficesFEA&CFDTechnologyPartnerSimulationSoftware1,700CustomersFullServiceProviderandServicesS

2、trongCommitmentPhysicalTestingtoCustomerServicesSatisfactionSimuTechGroupProfileLargestResellerofExperiencedandIndustryExpertiseEducatedFEA&CFDEngineeringStaffApplications50%StaffAdvancedFEA&CFDPhysicalTestingEngineeringdegreeSimulationSoftwareinNorthAmeric

3、aBackground•TheendgoalofFEAistoprovideusefuldatafromwhichpracticalengineeringdecisionscanbemade•InbetweenaCADmodelandthisusefuldataarethreemainphases–Preprocessing–Solution–Postprocessing•Thispresentationaimstolookatwaystoreducethetimeneededtoobtainasolutio

4、nSolution•TheSolutionphasecanbefurtherbrokendownintotwoareas–Logistics(launchingthejob,datatransfer,etc…)–ElapsedTimeWhatAffectsElapsedTime?AmountofworktobedoneRateatwhichworkcanbedoneDOFIterationsSolverComputerOSLinearVersionCPU#nodeNonlinearTypeGPUDOF/nod

5、eStaticHPCRAMDynamicHDDElapsedTimeSolver•SoftwareversionSolver•Solvertype–DirectVersionType–IterativeHPC•ParallelProcessingSoftwareVersion•Ifatallpossible,usethelatestreleaseofANSYS–Bugsfrompriorreleasehaveoftenbeenfixed–Solverperformancecontinuallyimproves

6、witheachrelease•Periterationperformancevirtuallyalwaysimproves•Sometimestotalnumberofiterationsgoesdown–Memorymanagementsometimesimproves–Contactalgorithmswilloftenbefaster–Solveroutput/feedbackoftenimprovesSolverType•Twomainsolvertypesforstructuralsimulati

7、ons–Direct–Iterative•InMechanical–DetailsofAnalysisSettings•SoverType•InMechanicalAPDL…–EQSLV,sparse–EQSLV,pcgDirectSolver•Sparsesolver•MethodologyfKx–Invertthestiffnessmatrix11KfKKxx•Computationallydifficult•Onlyneedstobedoneonce•Advantages–Robust•Guarante

8、edtoobtainasolution•Goodfordealingwithnonlinearities,shellelements–Supportseverything•Allelements,anykeyoption,allmaterialproperties,etc…DirectSolver•Disadvantages–Invertingthestiffnessmatrixcanbeverym