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Extrapolation of dynamic load behaviour on hydroelectric turbine blades with cyclostationary modelling

机译：利用循环平稳模型外推水电涡轮叶片动载荷行为

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摘要

In this paper, we present the application of cyclostationary modelling for the extrapolation of short stationary load strain samples measured in situ on hydraulic turbine blades. Long periods of measurements allow for a wide range of fluctuations representative of long-term reality to be considered. However, sampling over short periods limits the dynamic strain fluctuations available for analysis. The purpose of the technique presented here is therefore to generate a representative signal containing proper long term characteristics and expected spectrum starting with a much shorter signal period. The final objective is to obtain a strain history that can be used to estimate long-term fatigue behaviour of hydroelectric turbine runners.
机译：在本文中，我们介绍了循环平稳模型在水轮机叶片上现场测量的短期固定载荷应变样本外推的应用。长时间的测量允许考虑代表长期现实的各种波动。但是，短时间采样限制了可用于分析的动态应变波动。因此，这里提出的技术的目的是生成一个包含适当的长期特性和从非常短的信号周期开始的预期频谱的代表性信号。最终目标是获得可用于估算水力发电涡轮机转轮长期疲劳行为的应变历史。

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