起重机变幅系统柔性构件的非线性对构件自身及相关构件的受力有较大影响 ,因此提出了求解柔性构件的非线性计算方法 ,使计算结果更符合实际情况。 The nonlinearity of the flexible member of the crane luffing system has a great influence on the force of the component itself and its related components. Therefore, the nonlinear calculation method for solving the flexible component is put forward to make the calculation result more in line with the actual situation.