随机振动参数Grms_PSD计算表

Randomvibrationvibrationwhoseinstantaneousmagnitudeisnotspecifiedforanygivenoftime.Itisonlyspecifiedbyprobabilitydistributionfunctions,givingtheprobablefractionofthetotaltimethatthemagnitudelieswithinacertainfrequencyrangePSDthelimitingmean-squareaccelerationperunitbandwidth,describerandomvibrationamplitudeGrms:rootsqureUsetoquantifyaPSDplot,represent1&ofpeakacceleration(68%)VibrationbasiccalculationGrms计算基于随机振动Sinewavevibrationx=displacement(0-Peak)S=0或者S=3rms=0.707Xaverage=0.637x(0-Peak)A1=A2=DA=2倍振幅A3=DA49.69776cmA4=加速度a1GA5=频率f1HzA6=X24.84888cmA7=A8=A9=SumAGrms=vibrationwhoseinstantaneousmagnitudeisnotspecifiedforanygivenoftime.Itisonlyspecifiedbyprobabilitydistributionfunctions,givingtheprobablefractionofthetotaltimethatthemagnitudelieswithinacertainfrequencyrangethelimitingmean-squareaccelerationperunitbandwidth,describerandomvibrationamplitudeGrms计算基于随机振动分别输入各频段对应的PSD值g^2/HzHzS=0或者S=3PSD10.002f11S17.3949210.025397PSD20.03f23S200.12PSD30.03f37S3-5.830070.063603PSD40.015f410S400.525PSD50.015f545S5-6.061650.122483PSD60.01f655S600.25PSD70.01f780S7-5.269410.528771PSD80.002f8200S8#NUM!#NUM!PSD9f9S9#DIV/0!#DIV/0!1.635254所有A项求和1.27877ab0.0253970.0040.120.120.0636030.090.5250.5250.1224830.150.250.250.5287711.2#NUM!-0.4#DIV/0!0ISTA测试标准