2种约束条件下的 TRT 叶片静态及模态分析

高炉煤气余压透平发电装置（简称 TRT）是一种能源发电装置，叶片在 TRT 工作过程中起着能量转换的作用。在对叶片结构进行分析时，边界条件的施加方式会因安装及工作条件的不同而有所改变。本文采用 ANSYS Workbench 建立了 TRT 叶片的有限元模型，并根据叶片的安装及结构等特点，对叶根周向面确定了2种相对合适的边界约束条件，然后对叶片分别进行结构静力学和模态分析对比。结果表明，在约束条件Ⅱ下计算所得的应力、位移以及动频、静频的数值相比于约束条件Ⅰ下的都有所减小，应力、位移的分布规律以及模态振型几乎不变，分析结果为进一步对 TRT 叶片的相关试验和动力学分析和计算提供了一定参考依据。

Analysis of Static and Modal Characteristics of TRT Blade under Two Different Restricted Conditions

The blast furnace top gas recovery turbine （TRT for short）belongs to a new type of energy power generation device.The blades play an important role in energy conversion while they are working.When analysing on the blade,the boundary condition applied on mode will change with different installation and working condition.TRT blade finite element model was established by ANSYS Workbench software.According to the blade installation and structure characteristics,the blade root’s boundary conditions of constraint were selected by two relative suitable methods.Then,statics and modal anal-ysis were given respectively and be contrasted.This is further to TRT blades of the related test and dynamic analysis and the related test and calculation provides certain reference and basis.The result showed that the value of stress,displacement and dynamic or static frequency obtained are reduced under the constraint condition Ⅱ compared with constraint conditionⅠ, but the stress and displacement distribution law and modal shapes are almost the same.These results provide reference and basis for futher dynamic analysis and related experiment or calculation of TRT blades.