但是在钢铁合金的耐用度限制下，作为疲劳的结果，它们经受周期压力级别很少失灵。
But steel alloys subjected to cyclic stress levels below their endurance limit rarely fail as a result of fatigue.
飞机工程师面临的最大的一个难题就是飞机零部件承受的周期性疲劳是越来越强的。
The biggest problem aircraft engineers face is that the fatigue cycles a component faces are cumulative.
为更加合理地确定锥体平台结构的疲劳冰荷载，对冰力幅值和周期进行了联合概率分析。
The joint probability distribution of them is analyzed, which is great valuable to construct the fatigue ice-load for offshore platform with ice-broken cone.
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