OUT-OF-PLANE VIBRATION OF CURVED PIPES DUE TO PULSATING FLUID FLOW

脉动流体流引起的弯曲管道的面外振动

• 批准号: 17560213
• 负责人: YOSHIZAWA Masatsugu
• 金额: $ 2.24万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560213/
• 关键词: FLUID-CONVEYING PIPE; PULSATING FLUID FLOW; CURVED PIPE; ARTICULATED PIPE MODEL; 3-D MEASURMENT; UNSTEADY FLUID FORCE; FORCED-EXCITED VIBRATION; FUNDAMENTAL MODE; 面外振動; 非定常液体力; 係数励振

The dynamics of curved pipes conveying fluid are not so much studied which is compared with the dynamics of the straight pipe. In particular, the nonlinear integro-differential equations governing motion of flexible curved pipe conveying fluid are not yet derived under the influence of gravity, and there are no experimental results associated with the out-of-plane vibration of a curved pipe. In this paper, out-of-plane vibration of a curved pipe due to the pulsating fluid flow, has been investigated analytically and experimentally. First, mode shape and natural frequency of out-of-plane vibration was calculated as a function of the steady-state fluid velocity of the one-dimensional flow. Second, the stabilities of its static equilibrium solution depending on the pulsating component of fluid flow were investigated. Third, the above phenomena were discussed using the nonlinear integro-differential equations governing the nonlinear spatial vibration of a flexible curved pipe which have been derived in this paper. Finally the spatial motions of a curved pipe due to the pulsating fluid flow were measured by using the image processing system.

与直管输送流体的动力学相比，弯管输送流体的动力学研究较少。特别是在重力作用下柔性弯曲管道输送流体运动的非线性积分微分方程尚未导出，弯曲管道面外振动的实验结果尚未见。本文从理论和实验两方面研究了流体脉动作用下弯曲管道的面外振动问题。首先，计算了平面外振动的模态振型和固有频率作为一维流动稳态流体速度的函数。其次，研究了其静力平衡解随流体流动脉动分量的稳定性。第三，利用本文导出的柔性弯曲管非线性空间振动的非线性积分-微分方程对上述现象进行了讨论。最后利用图像处理系统测量了弯曲管道在脉动流体作用下的空间运动。

项目成果

機械力学

机械力学

• 发表时间: 2007
• 作者: 末益;金原;青木;萩原;久保
• 通讯作者: 久保

弾性送水管の内部流に起因した横振動(研究展望)

弹性水管内流引起的横向振动（研究视角）

• 发表时间: 2006
• 期刊: 日本機械学会論文集(C編) 72巻722号
• 作者: 谷口章;田中慎太郎;山下清隆;吉沢正紹;網代惇治;吉沢正紹
• 通讯作者: 吉沢正紹

LATERAL VIBRATION OF A PIPE CONVEYING FLUID

输送流体的管道的横向振动

• 发表时间: 2006
• 期刊: TRANSACTONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS 3071
• 作者: 谷口章;田中慎太郎;山下清隆;吉沢正紹;網代惇治;吉沢正紹;MASATSUGU YOSHIZAWA
• 通讯作者: MASATSUGU YOSHIZAWA

EXPERIMENS ON THE PLANAR LATERAL OF A VERTICAL FLUID-CONVEYING PIPE WITH AN END MASS

具有末端质量的垂直流体输送管的平面侧向实验

• 期刊: PROCEEDING OF ASME PVP CONFERENCE, VIBRATION ICPVT11-9290
• 作者: 網代惇治;吉沢正紹;山下清隆;阿形淳;JUNJI AJIRO
• 通讯作者: JUNJI AJIRO

弾性送水管の内部流に起因した横振動(管下端がばね支持されている場合の非線形安定性)

弹性水管内部流动引起的横向振动（管下端由弹簧支撑时的非线性稳定性）

• 发表时间: 2005
• 期刊: 日本機械学会2005年度年次大会講演論文集 No.05-1
• 作者: 網代惇治;吉沢正紹;山下清隆;阿形淳
• 通讯作者: 阿形淳