《Arabian Journal for Science & Engineering》刊登“考虑水库粘性和吸波性的大坝动水压力的解析解”

作者：Navayi Neya, Bahram ，Ardeshir, Mehdi

刊物：《Arabian Journal for Science & Engineering》，2013年8月，第38卷第8期，2023-2033页

关键词： 解析解，底部吸收，大坝-水库，动水压力，粘度频域

摘要：本文在考虑液体粘性和在垂直及水平加速度激发作用下大坝底部的吸波效应的基础上对混凝土坝水库的控制方程在频率范围内进行了求解。并将计算结果与与不考虑粘性时的计算结果进行比较，结果表明，粘性改变了水库的自然周期，因此对应的压力也被改变；水平加速度作用下的压力响应改变比垂直加速度作用下的改变更明显。另外，在接近水库自然周期的周期作用下，粘性流体的动水压力不同于无粘性的动水压力。坝底在一系列加速度激发下的吸波性会使压力响应明显减小；这一减小值取决于坝底的吸收系数，并且当激发期接近水库的自然周期时，减小的更加明显。

An Analytical Solution for Hydrodynamic Pressure on Dams Considering the Viscosity and Wave Absorption of the Reservoir

Authors：Navayi Neya, Bahram ，Ardeshir, Mehdi

Journal：Arabian Journal for Science & Engineering. Aug2013, Vol. 38 Issue 8, p2023-2033. 11p.

Key Word：Analytical solution，Bottom absorption，Dam-reservoir， Hydrodynamic pressure，Viscosity frequency domain

Abstract：In this paper, the governing equation of a concrete dam reservoir, which considers the fluid viscosity and the effect of bottom absorption under horizontal and vertical acceleration excitation, is solved in the frequency domain. The results are compared to those of a fluid when viscosity is excluded, and show that viscosity alters the natural period of the reservoir; consequently, the pressure responses are changed. Changes in pressure responses for excitation of the horizontal acceleration component have more intensity than for the vertical component. In addition, for periods close to the natural period of the reservoir, hydrodynamic pressure for viscous fluid differs significantly from the hydrodynamic pressure when the viscosity is zero. The bottom absorption for a range of excitation periods noticeably attenuates the pressure response; this reduction depends on the value of the bottom absorption coefficient, and is more intense when the excitation period is close to the natural period of the reservoir.

原文链接：https://vpn2.nlc.gov.cn/prx/000/http/web.ebscohost.com/ehost/detail?vid=8&sid=741ae87e-b79a-4d71-b1af-ff81241cc94c%40sessionmgr15&hid=23&bdata=Jmxhbmc9emgtY24mc2l0ZT1laG9zdC1saXZl#db=a9h&AN=89241322