...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Shock and vibration >Vibration Effects of Nonclassically Damped Building-Piping Systems Subjected to Extreme Loads
【24h】

Vibration Effects of Nonclassically Damped Building-Piping Systems Subjected to Extreme Loads

机译：承受极端载荷的非经典阻尼建筑管道系统的振动效应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Piping leakage can occur at T-joint, elbows, valves, or nozzles in nuclear power plants and nonnuclear power plants such as petrochemical plants when subjected to extreme loads and such leakage of piping systems can also lead to fire or explosion. For example, leakage of sodium, toxic gases, or nitrogen in hospitals can cause man-made hazards. The primary objective of this research is to understand the vibration effects due to classicalonclassical damping with building-piping systems under extreme loads. The current evaluation employed finite-element analysis to calculate the effects of the responses of classically and nonclassically damped building-piping systems. Classical and nonclassical damping matrices for a coupled primary-secondary system were developed based on the Rayleigh equation. A total of 10 selected ground motions were applied to single degree of freedom (SDOF) primary-SDOF secondary (2-DOF coupled) systems in which the ratios of the natural frequencies between the primary and secondary systems ranged between 0.9 and 1.1. It revealed that the vibration effect of nonclassical damping was significant where the natural frequencies of the two systems were nearly tuned. For piping-material nonlinearity, the effects of nonclassical damping on the result forces of piping systems were not significantly different from those of classical damping.
机译：当受到极端负荷时，核电站和非核电站（如石化厂）的T型接头，弯头，阀门或喷嘴处可能会发生管道泄漏，并且管道系统的这种泄漏也会导致火灾或爆炸。例如，医院中钠，有毒气体或氮气的泄漏会导致人为危险。这项研究的主要目的是了解建筑物管道系统在极端载荷下由于经典/非经典阻尼引起的振动效应。当前的评估采用了有限元分析来计算经典和非经典阻尼建筑管道系统的响应效果。基于瑞利方程，开发了耦合的一次-二次系统的经典和非经典阻尼矩阵。总共10种选定的地面运动被应用于单自由度（SDOF）初级-SDOF次级（2-DOF耦合）系统，其中初级和次级系统之间的固有频率之比在0.9到1.1之间。结果表明，在对两个系统的固有频率进行微调的情况下，非经典阻尼的振动效果非常显着。对于管道材料的非线性，非经典阻尼对管道系统合力的影响与经典阻尼没有显着差异。

著录项

  • 来源
    《Shock and vibration》 |2016年第3期|6189326.1-8760592.9|共9页
  • 作者

    Ryu YongHee; Jung WooYoung; Ju BuSeog;

  • 作者单位

    N Carolina State Univ, Dept Civil Engn, Raleigh, NC 27695 USA;

    Gangneung Wonju Natl Univ, Dept Civil Engn, Kangnung 210702, South Korea;

    N Carolina State Univ, Dept Civil Engn, Raleigh, NC 27695 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号