疲劳寿命估算。
Let the fuzzy theory be applied into the prediction of fatigue life-span so as to establish a prediction theory of fuzzy fatigue life-span.
将模糊理论应用于疲劳寿命预测中去，建立了模糊疲劳寿命预测理论。
The prediction of fatigue life is important for steel towers and so on, because for this type of structure wind load is regarded as the main load.
由于风荷载是钢塔架等钢结构的主要荷载，风荷载作用下上述结构的疲劳寿命预估因而是至关重要的。
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