It is applied in analyzing and calculating static distortion of skylift in virtue of updated lagrange formulation and iterative method with moving coordinates . the solutions are worked out by increment principle and newton - raphson method 在分析和计算消防车伸缩臂的静态变形时，引入了几何非线性的思想，借助更新的lagrange格式，将增量原理与牛顿-拉弗逊法相结合，并且使用带有动坐标的迭代方法求解。
