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ansys分析随机振动.doc

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DynamicStructures TITLE\*MERGEFORMATPSDVerification RandomVibrationAnalysiswithANSYSandVerification By YeZhou May2002 DynamicStructures TITLE\*MERGEFORMATPSDVerification FILENAME\*MERGEFORMATansys分析随机振动.docRev.DOCPROPERTY"Revision"\*MERGEFORMAT1SAVEDATE\*MERGEFORMAT5/29/20028:16:00AM p.PAGE\*MERGEFORMAT14/NUMPAGES\*MERGEFORMAT14 TableofContents TOC\o"2-3"1 IntroductiontoRandomVibration PAGEREF_Toc10368182\h3 1.1 FailureModesinRandomVibration PAGEREF_Toc10368183\h3 1.2 RandomVibrationInputCurveandUnits PAGEREF_Toc10368184\h3 1.3 NormalDistributionCurve PAGEREF_Toc10368185\h4 1.4 PSDforFatigueCalculation PAGEREF_Toc10368186\h5 2 Formulation PAGEREF_Toc10368187\h7 2.1 Steinbergformulation[1.9.16]: PAGEREF_Toc10368188\h7 2.2 Thomsonformulation[2.10.3]: PAGEREF_Toc10368189\h8 2.3 Newlandformulation[4.7]: PAGEREF_Toc10368190\h8 3 ANSYSProcedures PAGEREF_Toc10368191\h10 4 References PAGEREF_Toc10368192\h12 5 Appendix–ANSYSPSDInput/OutputFile PAGEREF_Toc10368193\h13 5.1 InputFile PAGEREF_Toc10368194\h13 5.2 OutputFile PAGEREF_Toc10368195\h15  ListofFigures TOC\z\c"Figure"Figure1Typicalwhitenoisecurvewithaconstantinputpowerspectraldensity(PSD) PAGEREF_Toc10368196\h4 Figure2Sample1-DOFmodel PAGEREF_Toc10368197\h7 Figure3ANSYScalculatedoutputPSD PAGEREF_Toc10368198\h10  ListofTables TOC\z\c"Table"Table1Typeofspectraldensities PAGEREF_Toc10368199\h4 Table2Safetyindex/sigmavaluesusedinbuildingcodes PAGEREF_Toc10368200\h5 Table3ANSYSresultsverification PAGEREF_Toc10368201\h10 Table4ANSYSPSDresultloadsteps PAGEREF_Toc10368202\h11  IntroductiontoRandomVibration Randomvibrationisbeingspecifiedforacceptanceandqualificationtestsbymanyinstitutions,becauseithasbeenshownthatrandomvibrationmorecloselyrepresentsthetrueenvironmentsinwhichthestructuresandequipmentmustoperate. FailureModesinRandomVibration Therearefourbasicfailuremodesthatmustbeconsideredunderrando