撞击 1.(撞) impact; ram; dash against; strike; knock; hit against 激 流对海岸的撞击 the impact of the swift current against the shore; 波浪撞击着岩石。 the breakers dashed on the rocks.2.[工业] liquid knockout; percussion; shock; impingement; brunt; impaction; wipe
反复 1.(重复) repeatedly; again and again; time and again; over and over again 反复解释 explain over and over again; 反复思考 think and think; think a lot about sth.; turn sth. over in one's mind again and again; contemplate; 这个计划是经过反复讨论而产生的。 the plan was born out of repeated discussions.2.(翻悔) reversal; relapse; changeable; fickle 思想上有反复 have ideological relapses; 我讲话是算数的, 决不反复。 i mean what i say and shall never react from [go back on] my words.3.(回到原有状态) reversal; relapse 有很多反复和曲折 full of reversals and zigzags; 你的病虽然好了, 可要防止反复。 you are well now, but mind you don't have a relapse
The elephant foot bulging deformation develops with the increasing stress of the rigid wall , which is caused by the uplift of the tank bottom and the impaction between the tank bottom and the foundation 因罐底提离导致的罐底与基础反复撞击加大了作用在罐壁上的应力,使罐壁底部“象足”变形不断发展,最终导致罐壁撕裂。