中文摘要：

在太空工程使用的面板类型结构能在服务受到严重高周波的声学的装载。这份报纸在声学的装载下面评估用陶器的矩阵 composites (CMC ) 做的面板类型结构的频率依赖者随机疲劳。第一，从宽带随机刺激的高周波的随机的回答将在时间的一个明确的时期导致更多的压力周期。压力振幅的概率密度分布将在不同频率带宽是不同的，尽管山峰压力评价是相同的。第二， CMC 的疲劳性质能是高度频率依赖者。为随机的颤动盒子的疲劳评估方法被采用评估代表性的使硬的面板结构的疲劳损坏。通过随机的疲劳损坏上的 S-N 曲线的频率效果数字地被验证。最后，一个参数被表明描绘随机的进程，和因此这个参数的吝啬的颤动频率能进一步在 CMC 的疲劳测试被看作合理装载频率获得更可靠的 S-N 曲线。因此，颤动频率的影响能从二个观点在随机的疲劳模型被合并。

英文摘要：

The panel-type structures used in aerospace engineering can be subjected to severe highfrequency acoustic loadings in service. This paper evaluates the frequency-dependent random fatigue of panel-type structures made of ceramic matrix composites（CMCs） under acoustic loadings. Firstly, the high-frequency random responses from the broadband random excitation will result in more stress cycles in a deinite period of time. The probability density distributions of stress amplitudes will be different in different frequency bandwidths, though the peak stress estimations are identical. Secondly, the fatigue properties of CMCs can be highly frequency-dependent. The fatigue evaluation method for the random vibration case is adopted to evaluate the fatigue damage of a representative stiffened panel structure. The frequency effect through S-N curves on random fatigue damage is numerically veriied. Finally, a parameter is demonstrated to characterize the mean vibration frequency of a random process, and hence this parameter can further be considered as a reasonable loading frequency in the fatigue tests of CMCs to obtain more reliable S-N curves.Therefore, the inluence of vibration frequency can be incorporated in the random fatigue model from the two perspectives.