一种适用于高温涡轮叶片的变形重构方法

A Deformation Reconstruction Method for High Temperature Turbine Blades

针对高温涡轮叶片变形监测的需求,提出了一种检测叶片变形的方案。该方案以Ko位移理论的变形重构算法为基础,以此来实现应变-变形的转换。首先对叶片进行仿真,将获得的应变结果进行重构得到变形结果。接着选取FBG传感器作为测量的应变传感器,搭建了基于FBG传感器的高温涡轮叶片变形测量实验平台,采用波分复用方式实现高温涡轮叶片应变的分布式测量,叶片变形由相应工况下的变形重构算法确定。通过实验结果与仿真结果的对比,两者吻合程度较好,验证了该实验方法和相应算法的可行性。

Aiming at the demand of high temperature turbine blade deformation monitoring,a scheme for detecting blade deformation is proposed.The scheme is based on the deformation reconstruction algorithm of Ko displacement theory to realize the strain deformation transformation.Firstly,the blade is simulated,and the obtained strain results are reconstructed to obtain the deformation results.Then the FBG sensor is selected as the measured strain sensor,and the experimental platform for high temperature turbine blade deformation measurement based on FBG sensor is built.The distributed measurement of high temperature turbine blade strain is realized by wavelength division multiplexing.The blade deformation is determined by the deformation reconstruction algorithm under corresponding working conditions.By comparing the experimental results with the simulation results,the agreement between them is good,which verifies the feasibility of the experimental method and the corresponding algorithm.