Firstly, simulated . experiments of FOD on the leading edge of the blade were performed. Then, the damaged blades were fatigue tested.
首先对叶片进气边分区进行了模拟外来物损伤试验，并对外伤叶片和损伤后的修理叶片分别进行了疲劳试验。
The results show that the extent of FOD depends on both impact energy E and geometric scale S. There exists a critical damage for a given blades.
结果表明，叶片的外物损伤程度取决于撞击能量E和几何标度S，对于一定的叶片，存在不影响疲劳寿命的极限损伤。
Repairing of the damaged parts and lowering of the vibration stress in the blade are effective measures to improve the resistance of the blade to FOD.
对叶片损伤处进行修复和适当减小叶片振动应力水平是提高叶片抗外物损伤能力的的有效途径。
They appear to be significant fod medium-term prediction of larg earthquakes and also give precursory information before moderate and small earthquakes...
订正海平面还能检出与中小地震有关的形变前的信息，文中并举出预测前兆形变成功的实例。
The residual vibration fatigue life of TC4 plate blade subjected to Foreign Object Damaged (FOD) is investigated by means of eddy current excited vibration fatigue tests.
采用电磁涡流激振的振动疲劳试验，对TC4材料制成的平板叶片受外物损伤后的剩余振动疲劳寿命进行了研究。
The residual vibration fatigue life of TC4 plate blade subjected to Foreign Object Damaged (FOD) is investigated by means of eddy current excited vibration fatigue tests.
采用电磁涡流激振的振动疲劳试验，对TC4材料制成的平板叶片受外物损伤后的剩余振动疲劳寿命进行了研究。
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