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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.8: Seismic Engineering; 20050717-21; Denver,CO(US) >EFFECT OF LOCAL WALL THINNING ON THE DYNAMIC BEHAVIOR OF PIPING SYSTEMS
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EFFECT OF LOCAL WALL THINNING ON THE DYNAMIC BEHAVIOR OF PIPING SYSTEMS

机译：局部墙体变薄对管道系统动力特性的影响

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摘要

In order to investigate the influence of degradation on dynamic behavior and the failure mode of piping systems with local wall thinning, shake table tests using 3-D piping system models were conducted. The degradation considered in this study was wall thinning, which would be caused in piping systems due to the effects of aging. The degradation condition induced in the piping system model was 50% full circumferential wall thinning at an elbow. The test model was designed to cause out-of-plane bending moment to the thinned-wall elbow by excitation tests. The model without wall thinning was also used in the excitation test to compare the behavior of the piping system models. These models were excited under same input acceleration until fatigue cracks penetrated or an excessive deformation occurred to the models. Through these tests, the vibration characteristic and the process to failure of degraded piping models were obtained for the out-of-plane bending model. This paper describes the dynamic response and failure behavior of piping systems with wall thinning based on the test results.
机译：为了研究退化对局部壁厚减薄的管道系统的动态行为和失效模式的影响，使用3-D管道系统模型进行了振动台测试。在这项研究中考虑的退化是壁变薄，这是由于老化的影响而在管道系统中引起的。管道系统模型中引起的退化条件是肘部全周壁变薄50％。测试模型的设计目的是通过激励测试使薄壁弯管产生平面外弯矩。在激励测试中还使用了不使壁变薄的模型，以比较管道系统模型的行为。这些模型在相同的输入加速度下被激发，直到疲劳裂纹渗透或模型发生过度变形。通过这些测试，获得了平面外弯曲模型的振动特性和退化的管道模型的破坏过程。本文根据测试结果描述了壁薄的管道系统的动态响应和失效行为。

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