shakedown period 中文意思是什麼
shakedown period
解釋
調整期-
Under varied loads such as cyclic and / or transient loading, soil structures or foundation will induce permanent and / or fluctuating plastic deformations. such plastic deformations are cumulative and / or alternating in nature with increase of time of loading during a sequence of cyclic loading. if the resulting accumulated deformations is limited within a given bound or the alternating deformations will be adapted to a given plastic state after a certain cycle numbers or a certain period of loading, the soils will be in shakedown state
在復雜變值荷載作用下，結構有可能出現兩種狀態：一種是在若干次載荷循環之後，塑性變形趨于穩定，在此後繼的載荷循環中結構表現為純彈性響應，這種狀態稱為安定狀態（ shakedown ） ；另一種則是塑性流動一直持續地發展或不斷反復，直至結構破壞，結構的破壞有兩種型式：一種是由塑性應變的累積引起的增量塑性破壞；一種是塑性變形多次反復引起的疲勞破壞，也稱為交變塑性破壞。
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