SENSITIVITY STUDY OF BLADE VIBRATION CHARACTERISTICS  TO THE BOUNDARY CONDI-TIONS OF BLADE ROOT

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SENSITIVITY STUDY OF BLADE VIBRATION CHARACTERISTICS TO THE BOUNDARY CONDI-TIONS OF BLADE ROOT

Thermal Power Generation Issue 1, (1999)

更新时间：2025-09-28

- SENSITIVITY STUDY OF BLADE VIBRATION CHARACTERISTICS TO THE BOUNDARY CONDI-TIONS OF BLADE ROOT
- 作者机构：
  
  国家电力公司热工研究院!西安７１００３２
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK263.3
- Published：1999
- 稿件说明：
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SENSITIVITY STUDY OF BLADE VIBRATION CHARACTERISTICS TO THE BOUNDARY CONDI-TIONS OF BLADE ROOT[J]. Thermal Power Generation, 1999, (1).
DOI：

SENSITIVITY STUDY OF BLADE VIBRATION CHARACTERISTICS TO THE BOUNDARY CONDI-TIONS OF BLADE ROOT[J]. Thermal Power Generation, 1999, (1). DOI：

摘要

叶根约束条件是采用有限元方法准确计算叶片振动特性的基本条件之一。通过多种叶根约束条件，采用三维八节点非协调有限元模型，研究带有双倒Ｔ型叶根３２３ｍｍ叶片的振动特性对叶根约束条件的敏感性，发现叶片振动特性对叶根与径向垂直表面的约束不敏感，对与周向垂直表面的约束敏感，以及对叶根上部相对接近叶型部位的约束较为敏感。推荐了反映实际状况的叶根约束方案。

Abstract

Boundary conditions of steam tUrbine blade root is one of the fundament requirements for accurate calculation of blade vibration characteristicswhile Finite Element Method is used. In this Paper

under various root boundary conditions of a 323mm long blade with double T - shaped root

thesensitivity of blade vibration characteristics to the boundary conditions is studied by using a 3D -- 8 Node flute element model. some valuable conclu-sinns are drawn. One is that the blade vibration characteristics are sensitive to the boundary conditions of root tangential vertical surface

but notsensitive to the boundary conditions of root radial vertical surface. Some methods

which can be used to dcal with the boundary conditions and tosimulate the actUal contract conditions between blade root and rotor disk and between blade roots

are recommended.

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