Dynamics of Variable Stator Vane Adjustment Mechanism Considering the Flexibility of Linkage

The variable stator vane adjustment mechanism plays a vital role in preventing the occurrence of surge due to its complex multistage linkage mechanism. Initially, the flexible body is modeled using the absolute nodal coordinate formulation method, followed by the formulation of rigid–flexible coupled dynamics equations using the Lagrange equations of the first kind for the single‐stage variable stator vane adjustment mechanism. The constraint equations are defined, and the dynamics equations are solved using the coordinate chunking method. Numerical simulation is employed to evaluate the crank’s angular displacement and angular velocity, with validation conducted by comparing results with Simscape to ensure model accuracy. The study explores the motion behavior of the variable stator vane adjustment mechanism under various joint stiffnesses, loads, and driving modes. Results show minor errors between numerical and Simscape simulations, with discrepancies of around 1.01% for crank displacement and 1.65% for angular velocity. Comparing angular displacement curves between rigid–flexible and purely rigid models indicates similar trends. Lower joint stiffness complicates stabilizing the connecting link’s speed, while increased loads lead to more significant deformation and speed fluctuations. The study recommends avoiding uniform‐speed drive modes in favor of simpler harmonic or variable‐speed modes for the mechanism’s cylinder. Additionally, joint clearance significantly influences dynamics performance, potentially resulting in abrupt changes in collision force values and increased risks of joint wear and pitting.