摘要
根据Jonswap谱确定随机波浪功率谱,进而由同一功率谱使用Shinozuka方法计算生成10个随机波浪力谱,应用雨流计数法对波浪力谱进行循环计数处理,最后使用基于能量释放率的Paris公式方法对构件进行疲劳裂纹扩展计算.可为海洋结构物的疲劳设计及疲劳寿命评估提供一定的参考.
In this study, ten random wave force spectra are first generated via Shinozuka technique from a specific random wave power spectrum via Jonswap technique. Then, the wave force spectrum is circulatedly processed using rain-flow counting method. Finally, the structural fatigue cracking propagation is computed based on the Paris equation with regard to energy releasing rates. Therein, this approach paves a venue for fatigue design and life-cycle estimation of sea-based structures.
出处
《中国工程机械学报》
2009年第1期20-25,共6页
Chinese Journal of Construction Machinery
基金
国家科技支撑计划资助项目(2007BAF10B05)
关键词
功率谱
随机波浪力谱
雨流计数法
能量释放率
Paris公式
power spectrum
random wave loading spectrum
rain-flow counting method
energy releasing rate
Paris equation
