权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A STUDY ON A NEW TYPE OF SLOSHING DAMPER IN WHICH POTENTIAL ENERGY IS DISSIPATED

一种新型势能耗散晃荡阻尼器的研究

基本信息

批准号：
11650252
负责人：
HAYAMA Shinji
金额：
$ 1.6万
依托单位：
TOYAMA PREFECTURAL UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650252/
关键词：
SLOSHING DAMPER POTENTIAL ENERGY DISSIPATION SUB-SPACE ONE-WAY VALVE BOTTOM LEAK HOLE MOST SUITABLE THROTTLE 逆止弁部下部放出部

项目摘要

In this research a new type of sloshing damper is proposed where a part of the potential energy due to the surface elevation is not converted into the kinetic energy to increase the fluid velocity by setting sub-spaces with bottom leak holes and one-way valves to container wall, and its damping characteristics are systematically studied for the case of sloshing in rectangular containers by numerical simulations. The summary of the research results is as follows.(1) The mathematical models are introduced to describe coupled fluid oscillations between the sloshing in the main rectangular container and the motion of surface elevation in the sub-spaces, which act as the potential energy consuming dampers.(2) The damping effects of the sub-spaces are studied by numerical simulations. At first, the resonant characteristics of sloshing are calculated in the case where no sub-spaces are equipped. Then, the series of numerical calculations are conducted, for the cases where the diameters of bottom leak holes are changed while the volume of sub-spaces and the area of the one-way valves are both kept constant. As a result, it is confirmed that there exists the most suitable diameter for the leak holes for given volume of the sub-spaces and area of the one-way valves. This fact shows one of the most important characteristics of the potential energy consuming dampers and also shows that this type of dampers could be applicable to many kinds of fluid oscillations.

本文提出了一种新型的液体晃动阻尼器，通过在容器壁面上设置带底部泄漏孔和单向阀的子空间，使容器内液面高度引起的部分势能不转化为动能，以提高流体速度，并通过数值模拟系统地研究了其对矩形容器内液体晃动的阻尼特性。研究结果总结如下。(1)引入数学模型来描述主矩形容器中的晃动和子空间中的表面高程运动之间的耦合流体振荡，子空间充当潜在的耗能阻尼器。(2)通过数值模拟研究了子空间的阻尼效应。首先计算了无子空间情况下的晃动共振特性。然后，在子空间体积和单向阀面积不变的情况下，对底部漏孔直径变化的情况进行了一系列数值计算。结果表明，对于给定的子空间体积和单向阀面积，存在最合适的泄漏孔直径。这一事实表明，一个最重要的特点，潜在的耗能阻尼器，也表明，这种类型的阻尼器可以适用于许多类型的流体振荡。