【摘要】 通过光学几何测量技术获取精确的叶片型面差异化信息（即几何失谐）建立整体叶盘的高保真动力学模型的方法，并进一步开展整体叶盘几何失谐辨识的研究。采用先进的三维结构蓝光扫描系统测量构建精确的叶片几何型面点云模型，然后采用网格变形技术，将谐调叶片有限元模型的表面节点自动投射至实测的点云表面，以回避传统逆向工程的实体模型重建环节，从而实现整体叶盘高保真动力学模型的快速构建。该模型可直接用于量化识别叶片几何失谐对其固有频率和振型的影响，其中各叶片“一弯”频率失谐量在2.1%以内，同时可以精确比对各叶片间的模态置信因子，因此可大幅提高整体叶盘建模和动力学仿真分析的准确性。更多还原

【Abstract】 Establishing a model for description of blade geometric mistuning is one of the fundamental problems for dynamic analysis of blisk. The blade profile difference(geometric mistuning)was captured accurately by using optical geometry measurement technology and then a high-fidelity blisk modeling method was established. According to the core idea of this method, an accurate point cloud representing blade geometries was built by means of advanced three-dimensional structured blue light scanning system. An adaptive mesh deformation technology was developed to automatically project the finite element model nodes of the blade to the measured point cloud. Without solid model reconstruction in the traditional reverse engineering, it enabled rapid generation of high-fidelity blisk model. The highfidelity blisk model can be directly used to quantitatively capture the influence of blade geometry variations on both its natural frequencies and mode shapes. Frequency mistuning of each blade was within2.1%, and the modal assurance criterion between each blade can be accurately compared. It is thus able to significantly improve the accuracy of modeling and dynamic analysis of blisk.更多还原