孙胜男, 苏志彬. 随机激励作用下悬浮隧道锚索的振动响应[J]. 工程力学, 2013, 30(3): 476-480. DOI: 10.6052/j.issn.1000-4750.2011.04.0234
引用本文: 孙胜男, 苏志彬. 随机激励作用下悬浮隧道锚索的振动响应[J]. 工程力学, 2013, 30(3): 476-480. DOI: 10.6052/j.issn.1000-4750.2011.04.0234
SUN Sheng-nan, SU Zhi-bin. VIBRATION RESPONSE OF SUBMERGED FLOATING TUNNEL TETHER SUBJECTED TO RANDOM EXCITATION[J]. Engineering Mechanics, 2013, 30(3): 476-480. DOI: 10.6052/j.issn.1000-4750.2011.04.0234
Citation: SUN Sheng-nan, SU Zhi-bin. VIBRATION RESPONSE OF SUBMERGED FLOATING TUNNEL TETHER SUBJECTED TO RANDOM EXCITATION[J]. Engineering Mechanics, 2013, 30(3): 476-480. DOI: 10.6052/j.issn.1000-4750.2011.04.0234

随机激励作用下悬浮隧道锚索的振动响应

VIBRATION RESPONSE OF SUBMERGED FLOATING TUNNEL TETHER SUBJECTED TO RANDOM EXCITATION

  • 摘要: 为了研究水下悬浮隧道锚索在随机激励作用下的响应,考虑锚索的垂度效应,建立水下悬浮隧道锚索非线性随机振动方程,采用蒙特卡罗数值模拟法对随机激励作用下锚索的振动响应进行研究。研究结果表明:在零均值高斯白噪声激励作用下锚索的位移和速度均方根响应经过一定时间后将趋于定值;随着激励荷载均方根的增大,锚索位移和速度均方根响应也随之增大;由于水体阻尼力的作用,锚索的位移和速度均方根响应比空气中的锚索大幅减小。

     

    Abstract: To study the vibration response of a submerged floating tunnel tether subjected to a random excitation, a non-linear random vibration equation of the tether is set up by taking the sag of the tether into account, which is analyzed by the Monte Carlo method. It may be concluded that, the displacement and velocity root mean square response of the tether subjected to a zero-mean Gaussian white noise excitation tends to be a fixed value after a certain period of time; the displacement and velocity root mean square response of the tether increases with the root mean square of excitation; due to the damping force of water, the displacement and velocity root mean square response of the tether decreases rapidly compared with that of a tether in air.

     

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