2024年4月6日发(作者：iphone11价格表今日价格)

Random vibration

vibration whose instantaneous magnitude is not specified for any given of time. It is only

giving the probable fraction of the total time that the magnitude lies within a certain f

PSD

the limiting mean-square acceleration per unit bandwidth, describe random vibration amplit

Grms: root squre

Use to quantify a PSD plot, represent 1& of peak acceleration(68%)

Vibration basic calculation

Sine wave vibration

x=displacement(0-Peak)

rms=0.707 X average=0.637x(0-Peak)

DA = 2 倍振幅

DA49.69776cm

加速度a1G

频率f1Hz

X24.84888cm

Grms 计算 基于随机振动

S=0或者S=3

A1=

A2=

A3=

A4=

A5=

A6=

A7=

A8=

A9=

SumA

Grms=

ny given of time. It is only specified by probability distribution functions,

tude lies within a certain frequency range

ribe random vibration amplitude

0.025397

0.12

0.063603

0.525

0.122483

0.25

0.528771

#NUM!

#DIV/0!

1.635254所有A项求和

1.27877

分别输入各频段对应的PSD值

g^2/HzHz

PSD10.002f11

PSD20.03f23

PSD30.03f37

PSD40.015f410

PSD50.015f545

PSD60.01f655

PSD70.01f780

PSD80.002f8200

PSD9f9

S17.394921

S20

S3-5.83007

S40

S5-6.06165

S60

S7-5.26941

S8#NUM!

S9#DIV/0!

Grms 计算 基于随机振动

S=0或者S=3

a

0.025397

0.12

0.063603

0.525

0.122483

0.25

0.528771

#NUM!

#DIV/0!

b

0.004

0.12

0.09

0.525

0.15

0.25

1.2

-0.4

0