An Experiment Method for Measuring the Stress Distribution of the Turbine Blade Tenon
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摘要: 测量航空发动机燃气涡轮工作叶片榫头部位应力分布的难度很大,论文提出并实施了一种通过光弹性冻结试验来实现这一目的方法。完成了光弹性模型的设计并采用真空浇注系统浇注了毛坯,采用数控铣技术加工了光弹性模型,在模块化、组合化的模型加载装置上完成了光弹性冻结试验,通过切片及应力分析得到了燃气涡轮盘榫头部位的应力分布,有限元计算结果验证了光弹性冻结试验的有效性,为航空发动机燃气涡轮工作叶片榫头部位的强度和寿命分析提供了可靠的依据。Abstract: It is very difficult to measure the stress distribution of gas turbine operating blade of tenon,an experiment method is proposed and realized by photoelastic frozen experiment. A few photoelastic models were designed and blanks were casted by vacuum pouring system,then,the blanks were machined by computer numerical control milling technology. The photoelastic experiment was accomplished by using a modularized and assembled unit,stress distribution of gas turbine operating blade tenon was obtained through slicing and stress analyses. The effectiveness of the experiment is proved by finite element computation results. The photoelastic frozen experiment provides reliable basis for strength and life analysis of gas turbine operating blade tenon of aeroengine.
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Key words:
- blade /
- calculations /
- design /
- efficiency /
- errors /
- experiments
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