Via this model , automatic identification of circuit and circuit defect of s - sbc are realized . the procedures to check for the existence of a crank in all types of s - sbm are found . the method of stationary configuration loop to solve the order of motion of s - sbm is presented 基于此模型，实现了s - sbc回路及回路缺陷的自动识别，给出并证明了所有类型的s - sbm的曲柄存在条件及判断方法；提出了解决s - sbm运动顺序问题的静止位形点环路法。
The purpose is to determine the small deformation under additional loading under the given initial static stress field in the reference configuration , and the corresponding reverse question , to determine the initial stress distribution in a structure subjected to additional deformation under the external load 已知参考位形中的初始静态应力场，求在附加外力作用下相对于此位形的小变形运动；以及相应的反问题，即已知附加作用下的变形运动，求初应力。
