功率谱密度法的随机疲劳试验研究  

STUDY ON RANDOM FATIGUE TEST BY POWER SPECTRAL DENSITY APPROACH

作　　者：钱家玉[1] 

机构地区：[1]中国船舶科学研究中心

出　　处：《中国造船》1999年第4期59-63,共5页Shipbuilding of China

摘　　要：本文讨论了随机疲劳载荷谱的设计和修正，随机疲劳试验的过程，实测随机数据的采集、计数和统计分析。介绍了功率谱密度法随机疲劳试验的实施。该方法包含的载荷成分比较全面，载荷的分布规律更接近于实际，其分析结果对预估疲劳寿命有更高的精度。In present paper, the design and modification of the random fatigue load spectrum, the procedure of the fatigue test, and the sampling , counting and statistical analyzing of random data based on measured records are discussed. The power spectral density approach (P. S. D) is employed. By using this approach, the more comprehensive components of loading can be included and the distribution of these components would more closely coincide with the realistic loading, therefore the higher accuracy of the fatigue life estimation can be achieved.

关 键 词：疲劳载荷 随机载荷 船舶 密度法 功率谱 

分 类 号：U661.43[交通运输工程—船舶及航道工程]