Nonlinear dynamic analysis of low pressure rotor of high parameter turbine by improved segment direct integration method

Based on time precise integration method, an improved precise integration method, which called, is studied in the paper to solve the dynamic equation of (v) over dot = Hv + f, where v is an unknown n dimensions vector, Hv and f are respectively the linear homogeneous part and nonlinear part on the right end of equation. Then the calculation expressions of the method are given. The numerical example of nonlinear dynamic analysis of low pressure rotor of high parameter turbine shows that the proposed method is no need to solve the H-1 and the computational accuracy and efficiency can be ensured.