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笫四讲其它计算方法一、摩擦圆法本法又称为Φ圆法,文献作了较详细的叙述。所谓摩擦圆是在圆弧滑面的转动中心(即圆心)处,用滑动圆弧半径R与sinΦ(Φ为滑面内摩擦角)的乘积为半径所作的圆。该圆具有这样的特性:过滑动面上任意点与R半径成Φ角的直线必与Φ圆相切。如图36,已知某一滑体AFE及其c、Φ值,用Φ圆法求安全系数Fs的过程如下:
笫 Four other methods of calculation First, the friction circle method This method is also known as Φ circle method, the literature made a more detailed description. The so-called friction circle is the circle at the rotation center of the circular sliding surface (ie, the center of the circle), and the radius of the sliding arc radius R and sinΦ (Φ is the friction angle of the sliding surface). The circle has such a characteristic that a straight line at any point on the sliding surface that forms an angle φ with the radius R must be tangent to the circle φ. As shown in Fig. 36, a sliding body AFE and its c and Φ values are known. The procedure for obtaining the safety factor Fs using the Φ circle method is as follows: