VSV调节机构的仿真提速和精度补偿措施

doi:10.7527/S1000-6893.2021.26034

Abstract

Abstract: The adjusting mechanism of variable stator vane plays an important role in improving the surge margin of the gas turbine engine. Based on the multibody dynamics theory and self-developed parametric modeling platform, a five-stage rigid-flexible coupling dynamic model with complex factors such as temperature effect, dimensional error, moving pair clearance, and nonlinear friction contact, is constructed. The expression of the shaft-bushing normal nonlinear contact force is analytically deduced, and it is verified that the influence of different normal contact force models on the simulation results is less than 2.198%. By simplifying the configuration of the dynamic model, and providing the solver with the partial derivative of the force element with respect to the state variable, the calculation efficiency is increased by 24.56% at the maximum on the premise of ensuring the calculation accuracy of the rigid-flexible coupling dynamics model. Based on the finite difference method, the blocking force and angle adjustment accuracy of the adjustable stator blade adjustment mechanism are solved for some parameters. And based on the local sensitivity, the compensation measures to improve the performance of the mechanism are proposed, and the rationality of the compensation measures is verified through dynamic simulation.

Key words: adjusting mechanism, rigid-flexible coupling dynamics, computational efficiency, local sensitivity, retarding force, angle adjustment accuracy

CLC Number:

V233.95

ZHANG Baozhen, WANG Hanping, XU Feng, WU Zhiqing. Simulation speed-up and accuracy compensation measures for adjusting mechanism of variable stator vane[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 226034-226034.

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Simulation speed-up and accuracy compensation measures for adjusting mechanism of variable stator vane

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