玻璃钢/复合材料

• 基础研究 •    下一篇

GFRP管道力学长期性能短时预测方法研究

梁 娜1, 2, 朱四荣2*, 陈建中2   

  1. 1.湖北科技学院数统院,咸宁437100;
    2.武汉理工大学理学院,武汉430070
  • 收稿日期:2017-02-16 出版日期:2017-07-28 发布日期:2017-07-28
  • 通讯作者: 朱四荣(1969-),女,博士,教授,主要从事复合材料长期力学性能方面的研究,zhusirong@whut.edu.cn。
  • 作者简介:梁娜(1978-),女,副教授,博士生,主要从事复合材料长期力学性能方面的研究。
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(2016IA006);湖北省教育厅项目(B2015083)

THE SHORTER TIME PREDICTION METHOD OF LONG-TERM PROPERTY OF GFRP PIPES

LIANG Na1,2, ZHU Si-rong2*, CHEN Jian-zhong2   

  1. 1.School of Science, Wuhan University of Technology, Xianning 430070, China;
    2.School of Mathematics and Statistics, Hubei University of Science and Technology, Wuhan 437100, China
  • Received:2017-02-16 Online:2017-07-28 Published:2017-07-28

摘要: 玻璃纤维增强塑料(GFRP)管道规范标准要求试样失效时间达到10000 h以上,且至少18个数据量才能用于预测期望寿命50年的力学性能值。基于回归优化理论,提出了GFRP管道力学长期性能短时预测的1-4-4组合最优方案。按照规范标准进行了GFRP管长期环弯曲应变Sb的实验测得数据,运用提出短时预测方法和标准方法,分别建立双对数回归模型,预测GFRP管50年Sb值。结果表明,仅含9个数据量的最优方案的预测值与标准方法相比,相对误差均不超过5.24%,说明了该短时预测最优方案的有效性。

关键词: 玻璃纤维增强塑料管道, 力学长期性能, 双对数回归模型, 最优方案, 短时预测

Abstract: The certification of glass-fiber reinforced plastic (GFRP) piping systems is regulated by normative standards in which test series of 10,000 h are needed to predict the residual property of the expected life (normally, 50 years). In this paper, the 1-4-4 combined optimal scheme for prediction of long-term property of GFRP pipe is proposed. This system involves using orthogonal design and test schemes lasting under 10,000 h. Experimental results for long-term ring-bending strain (Sb) of GFRP pipes from the standard test procedure indicate that this system is practical and effective. The estimation error when using the proposed method was consistently less than 5.24% as compared to the standard method.

Key words: GFRP pipes, prediction of long-term property, log-log regression model, optimal scheme, the shorter time prediction

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