基于应力影响系数法的高边坡临界滑动面研究

为研究悬浮式中耳植入式助听装置中悬浮振子对中耳声传播特性的一些影响，建立了 包括绑定悬浮振子的中耳有限元模型. 该模型基于一无任何听力损伤病史的成年志愿者的 左耳，利用CT扫描和逆向成型技术建成. 模型的可靠性通过鼓膜及镫骨底板的位移计算结果 与国外文献实验测得数据进行对比加以验证. 研究结果表明:悬浮振子的绑定会显著恶化中耳 的高频传输特性；振子输出8.9\times10^5N的激振力才能激起100dB声压所 对应的激振效果；振子在砧骨长突上的绑定位置离砧镫关节越近，高频段激振效果越好.

DETERMINATION OF CRITICAL SLIP SURFACE OF HIGH STEEP SLOPE BASED ON THEORY OF THE STRESS EFFECT COEFFICIENT

The critical slip surface is controlled by two aspects,one is the combination relation with rock mass discontinuity and slope,another aspect is the size and the lie of the load. The failure mechanism of high steep slope intact rock is very complex,the search for critical slip surface is tedious. The shape and position of 3 D critical slip surface of high steep slope intact rock under load are analyzed based on the stress effect coefficient. The effects of influence factors on the shape and position of 3 D critical slip surface are analyzed. Results show that the shape of critical slip surface of high steep slope intact rock under load should be an irregular wedge body and mainly in front region of the foundation,and the side of wedge is related to the size of bridge foundation,slope and the distance of bridge foundation. The load strength has no effect on the shape of critical slip surface,and the distance of bridge foundation  has an important effect on it. The range of critical slip line of high steep slope intact rock under load increases with the size or distance of bridge foundation,and with the slope increased,the length of critical slip line decreases,the depth increases. The range of 3 D critical slip surface on high steep slope intact rock is determined as follow:  Pw=08444L-05098α+05759S+693716,Ph=01148L+0171B+11725α+00733S-5719．