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首页> 外文期刊>The international journal on hydropower & dams >A new Francis runner design procedure to predict static stresses at speed-no-load operation
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A new Francis runner design procedure to predict static stresses at speed-no-load operation

机译：一种新的弗朗西斯流道设计程序，可预测空载运行时的静态应力

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摘要

In this paper a new automated methodology used to compute the static stresses at speed-no-load (SNL) condition has been presented. The validation shows very good agreement with the results obtained with on-site strain gauge measurements. Different sensitivity analyses have been carried out to verify the quality of the results. With such a robust and flexible process, it is now possible to analyse all projects under the SNL operating condition during the design phase. The dynamic stresses are not considered with this methodology, and an accurate method for their prediction is still a topic of research. However, the static or mean stresses under SNL are a necessary element in the design life assessment of a Francis turbine runner. The methodology presented can already be used to control adequately the mean stress levels at SNL condition and thus increase the reliability of the runner.
机译：在本文中，提出了一种新的自动化方法，用于计算空载速度（SNL）条件下的静态应力。验证显示与现场应变仪测量获得的结果非常吻合。已经进行了不同的灵敏度分析，以验证结果的质量。通过这种强大而灵活的过程，现在可以在设计阶段分析SNL操作条件下的所有项目。这种方法没有考虑动态应力，准确的预测方法仍然是研究的主题。但是，SNL下的静应力或平均应力是弗朗西斯水轮机转轮设计寿命评估中的必要元素。所介绍的方法已经可以用来在SNL条件下适当地控制平均应力水平，从而提高跑步者的可靠性。

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