产品厂商新闻方案技术培训下载招聘品牌展会视频媒体国防军民融合

  •  
     

    小子样测定叶片S-N曲线试验方法研究

    2016-03-03 中国测试张 冰1,2, 陈立伟1, 陈永祥1, 闫旭东2, 赵帅帅2
    摘  要:根据试验要求,对叶片在样本较少情况下测定其疲劳极限σ-1和S-N曲线。通过振动疲劳试验的方法进行研究,试验采用升降法选择所施加振动应力的水平,采用异方差回归分析方法进行疲劳试验数据的分析。最后获得叶片材料的均值S-N曲线和置信度为95%、可靠度为99.9%的P-S-N曲线,并得到各自曲线上的疲劳极限σ-1。此方法保证试验的顺利进行并且具有较高的可靠性,对于小样本测定材料的S-N曲线具有较好的实用价值。
    关键词:疲劳极限;小子样测试;S-N曲线;升降法;异方差回归分析方法
    文献标志码:A       文章编号:1674-5124(2015)12-0124-04
    Studies on small sample test method for blade S-N curve
    ZHANG Bing1,2, CHEN Liwei1, CHEN Yongxiang1, YAN Xudong2, ZHAO Shuaishuai2
    (1. Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;
    2. Tianjin Aero-space Relia Technology Co.,Ltd.,Tianjin 300462,China)
    Abstract: To determine the fatigue limit σ-1 and S-N curve of blades with few small samples as the test requirements. Vibration fatigue test, that is, the level of vibration stress was fixed via up-down method and the test data was analyzed through variance regression. The S-N curve of mean value and P-S-N curve with 95%-confidence coefficient and 99.9%-reliability of blade materials have been obtained, so as the fatigue limit σ-1 of each curve. The method ensures the smoothness and reliability of the test and has a guiding significance in determining the S-N curve of materials through small sample test.
    Keywords: fatigue limit; small sample test; S-N curve; the up and down method; the variance regression analysis method
    分享到:
     
     
     
     
    热门产品
     
    推荐厂商
     
    关于我们 | 联系我们 | 广告服务 | 版权隐私 | 积分换礼 | 友情链接 | 站点导航 | 违规举报