求助:在API 610 5.6.15中:The rotor of one and tow stage pumps shal be designed so its first dry-bending critical speed is at least 20% above the pumps's maximum continous operating . 7 j0 S( T8 w& P5 i; O" W- |* h% [! B/ ^9 r' M# L; a; h
; u" R: i' l. T+ `7 b N% s 其中 first dry-bending critical speed 是指啥意思。 # s! S7 [2 C8 @" H2 z L2 Y* S" K) p/ z& K* g' M8 k
谢谢