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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference: Design and Analysis of Ressure Vessels and Piping: Implementation of ASME B31, Fatigue, ASME Section VIII, and Buckling Analyses; 20030720-20030724; Cleveland,OH; US >EFFECTS OF INLINE ROTATING COMPONENT ON PIPING SYSTEM DYNAMIC CHARACTERISTICS
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EFFECTS OF INLINE ROTATING COMPONENT ON PIPING SYSTEM DYNAMIC CHARACTERISTICS

机译：在线旋转组件对管道系统动态特性的影响

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Piping system dynamic characteristics are determined utilizing the classical Eigen-Value problem solution. Systems with integrated inline rotating components would experience some changes in these characteristics. The intensity of these changes depends on the relative magnitudes of their rotational momentums. Pseudo single degree of freedom 'SDOF', systems that include gyroscopic momentum of a rotating shaft are formulated and are subjected to seismic base excitations. The comparative responses of these SDOF are investigated. The gyroscopic inertia significantly alters their predicted seismic responses. For multi-degree of freedom system, simplified methodology is formulated to provide quick assessment of including the gyroscopic effects of the rotating components. The lumped parameters of the inline-rotating component within the piping system require the velocity degrees of freedom to be included in the analysis. This results in the non-classical Eigen-Value problem type of formulation. The latter is simplified utilizing the classical Eigen-Value solution conventionally termed as normal modes extraction. The normal modes synthesis reduces the number of degrees of freedom for the non-classical Eigen-Value problem to a manageable level. The concept of mode shape utilization coefficient 'MSUC', is introduced to provide quick assessment of the system. The gyroscopic inertia does not dominate the system dynamic characteristics. Low to moderate rotational momentums, typically installed by the industry, slightly affect the piping system dynamic characteristics. This justifies the industry practice of ignoring the rotational momentums within the piping systems routine analysis. It is also found that very high rotational momentums are artificially required to dramatically change the system dynamic characteristics.
机译：管道系统的动态特性是利用经典特征值问题解决方案确定的。具有集成的直列旋转组件的系统将经历这些特性的一些变化。这些变化的强度取决于其旋转动量的相对大小。拟定了包含旋转轴的陀螺动量的伪单自由度“ SDOF”系统，并对其进行了地震基础激励。研究了这些SDOF的比较响应。陀螺惯性极大地改变了其预测的地震响应。对于多自由度系统，制定了简化的方法，以提供包括旋转部件的陀螺效应在内的快速评估。管道系统内的直列旋转组件的集总参数要求将速度自由度包括在分析中。这导致了公式的非经典特征值问题类型。后者利用传统上称为特征模态提取的经典特征值解决方案进行了简化。正常模式综合可将非经典特征值问题的自由度降低到可管理的水平。引入了模式形状利用系数“ MSUC”的概念，以提供对系统的快速评估。陀螺惯性并不控制系统的动态特性。通常由工业安装的低到中等的旋转动量会稍微影响管道系统的动态特性。这证明了忽略管道系统常规分析中的旋转动量的行业惯例。还发现人为地需要很高的旋转动量来显着改变系统的动态特性。

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