震動試驗 - 單位介紹

(A) Sinusoid Vibration

 

       ◎ Frequency Range : Hz

       ◎ Sweep Type : Linear or Logarithmic

       ○ Acceleration : G

       ○ Velocity : mm/s or in/s

       ○ Displacement : mm or inch

       ※ Slope : dB/Oct

       ● Duration : hour : min : sec

       ● Sweep : cycle

       ◎ Velocity : Oct/min or min/sweep

 

 

(B) Random Vibration

 

       ◎ Frequency Range : Hz

       ○ Power Spectrum Density, PSD : G²/Hz

       ○ Acceleration effective value : Grms

       ※ Slope : dB/Oct

       ◎     Dwell : hour : min : sec

       ( ◎ Must ;  ○/● = Need choose 1;  ※ choose )

   

 

(C) Unit Transform

 

(C-1) 1 G = 9.8 m /s²

1 m/s²  = 0.102 G

 

(C-2) PDS Unit Transform

 

(1)     標準 PDS 單位：G²/Hz

(2)     G²/Hz = (9.8 (m/s² )) ² / Hz

(3)     G²/Hz = 96.04 m² /s³

(4)     G²/Hz = 9.8 G x m/s

 

G²/Hz = (9.8 (m/s² )) ² / Hz = 96.04 ( m²/s⁴  ) / ( 1/s )

= 96.04 m² /s³= 96.04 G x m/s