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首页> 外文期刊>Journal of Materials Engineering and Performance >Dynamic Responses of Nickel-Based Single Crystal Superalloy DD6 Blade
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Dynamic Responses of Nickel-Based Single Crystal Superalloy DD6 Blade

机译：镍基单晶高温合金DD6叶片的动态响应

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摘要

The aim of this article is to address the dynamic responses properties of the second-generation nickel-based single crystal superalloy DD6 with different orientations, rotor speeds, and temperatures, and this work can lay good foundation for predicting damage behaviors of the DD6 blade and starting with the application of gas turbine in aerospace. The finite element method was applied to investigate the dynamic characteristics of the DD6 blade with [001] and [111] orientations under different rotor speeds at 760, 980, and 1070℃. On the basis of establishing the elastic-plastic constitutive model of single crystal alloy, the dynamic responses model of a DD6 blade was educed. As a result, the corresponding static and dynamic frequencies were analyzed for different temperatures, rotor speeds, and orientations. Comparison of the computational and experimental results shows the proposed model of the DD6 blade is effective. The analyses indicate that the natural frequencies of [111] orientation is higher than that of [001], and the effect of rotor speed on natural frequencies of [001] orientation is greater than that of [111]. In other words, the values of the natural frequency are increased with the elevated rotor speed, and the values of the natural frequency are decreased obviously with the elevated temperature.
机译：本文旨在解决具有不同方向，转子速度和温度的第二代镍基单晶高温合金DD6的动态响应特性，这项工作可为预测DD6叶片和首先从燃气轮机在航空航天中的应用开始。应用有限元方法研究了在760、980和1070℃不同转速下具有[001]和[111]取向的DD6叶片的动态特性。在建立单晶合金弹塑性本构模型的基础上，推导了DD6叶片的动力响应模型。结果，针对不同的温度，转子速度和方向分析了相应的静态和动态频率。计算结果和实验结果的比较表明，所提出的DD6叶片模型是有效的。分析表明，[111]方向的固有频率高于[001]的固有频率，转子转速对[001]方向的固有频率的影响大于[111]的固有频率。换句话说，固有频率的值随着转子速度的升高而增加，而固有频率的值随着温度的升高而明显降低。

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