提供的公式可用来估定合乎实用的疲劳应力幅值，表明现行规程中提供的疲劳容许应力指标需要加以修正。
The proposed formula used to evaluate the allowed fatigue stress range shows that a new amendment for the criterion of allowable fatigue stress provided in the current code is necessary.
最后对渤海JZ 20 - 2 MS W平台进行时变疲劳可靠性分析。结果表明，本文提出的疲劳应力幅近似计算方法和时变可靠性分析方法是合理有效的。
Finally, the time-dependent fatigue reliability of MSW platforms of JZ20-2 in Bohai bay is evaluated, and the results demonstrate the method proposed in the present paper is rational and efficient.
用循环计数法求出载荷及应力幅频率分布，用概率密度函数拟合，为疲劳设计提供可靠性高的数据资。
The loads and the distribution of stress amplitude frequency are obtained by cycle count and reliable data for fatigue design are provided by probability density function fit.
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