中文摘要：

针对在小振幅、高频受力工况下微小与硬脆材料构件的疲劳检测,提出利用压电振子（PZT、PLZT或PMN）作为高频疲劳试验机构的驱动力源,并利用系统共振方法设计高频疲劳试验机构。首先,介绍压电共振式疲劳试验机构的工作原理,建立了动力学模型,获得了系统的动态特性。然后,设计和制作了样机。最后,利用样机测量了作用在试件上的动载荷。实验结果表明：改变输入交流电压幅值（100～250V）和板弹簧厚度（1.1～0.6mm）,可施加在试件上的动载荷为24.7～99.2N。本文制成的样机适用于测试动载荷在为24.7～99.2N,且在小振幅、高频受力工况下试件的拉伸和弯曲疲劳性能。

英文摘要：

To get fatigue properties of the small and hard brittle components working at conditions of little amplitudes and high frequency forces, this paper presents a novel kind of resonance and high fre- quency fatigue testing machine driven by a piezoelectric vibrator （PZT.PLZT or PMN）. First, the working principle of the piezoelectric resonance and high frequency fatigue testing machine was intro- duced, and the dynamic model of the machine was established and its systemic dynamic characteristics were obtained. Then, a prototype was designed and produced. Finally, the dynamic load on the speci- men was measured by the prototype. The results indicate that the dynamic load on the specimen is 24.7-99.2 N by changing the AC voltage amplitude （100-250 V） and the thickness of the plate spring （1.1-0.6 mm）. The prototype designed in this paper is suitable for the tensile and bending fa- tigue testing under conditions of little amplitudes and high frequency forces with the dynamic load mentioned above.