通过振动三轴试验，研究干湿循环过程对水泥改良粉质粘土和水泥改良粉土疲劳强度的影响。
The effects of cyclic dry-wet process on the fatigue strength of the cement silt clay and the cement silt are researched by cyclic triaxial tests.
本文给出了构件振动时不发生共振及疲劳强度的可靠性计算方法。
A calculating method of a vibrating structural components' reliability, which includes the reliability of fatigue strength and that of resonance avoiding, are proposed.
认为短管失效为疲劳失效，疲劳强度低，振动载荷大是短管失效的主要原因。
The efficacy losing of short pipe is due to the fatigue of the short pipe, the main reasons are the low fatigue strength and heavy vibration load.
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