缸筒锅式流体阻尼器(Cylinder Pot Fluid Damper)简称为阻尼锅,广泛应用于工业管道减振装置中。这类阻尼器构造简单、没有方向限制,且一般不存在漏油问题。这种与高压密封的常规阻尼器不同的构造,使其在发明并应用的同时就形成了另一个...缸筒锅式流体阻尼器(Cylinder Pot Fluid Damper)简称为阻尼锅,广泛应用于工业管道减振装置中。这类阻尼器构造简单、没有方向限制,且一般不存在漏油问题。这种与高压密封的常规阻尼器不同的构造,使其在发明并应用的同时就形成了另一个流体阻尼器的分支:即在一个容器内放置粘滞液体,通过一个可活动的"杆"上下或左右移动,靠侧面液体剪切摩擦和底部受压产生一定的阻尼作用。目前这种产品动力性能的研究在我国较为少见。美国国家地震工程研究中心(NCEER)在上世纪90年代初对该产品进行了详细研究,并给出了符合产品性能的理论表达式。研究结果显示:缸筒流体阻尼器是一种对频率和温度极为敏感、参数几乎无法预知的缓冲装置,因而这种产品的使用有一定局限性,特别是用于对频率、温度以及耐久性要求极高、需要定量分析的结构减振TMD中。由于这种产品特性被人忽视,近些年在一些TMD工程中得到应用,但其是否适宜应用在大型TMD中仍值得推敲。展开更多
On the basis of the piezoelectric theory, Mindlin plate theory, viscoelastic theory and ideal fluid equation, the finite element modeling of a fluid-filled cylindrical shell with active constrained layer damping (ACLD...On the basis of the piezoelectric theory, Mindlin plate theory, viscoelastic theory and ideal fluid equation, the finite element modeling of a fluid-filled cylindrical shell with active constrained layer damping (ACLD) was discussed. Energy methods and Lagrange’s equation were used to obtain dynamic equations of the cylindrical shell with ACLD treatments, which was modeled as well with the finite element method. The GHM (Golla-Hughes-McTavish) method was applied to model the frequency dependent damping of viscoelastic material. Ideal and incompressible fluid was considered to establish the dynamic equations of the fluid-filled cylindrical shell with ACLD treatments, Numerical results obtained from the finite element analysis were compared with those from an experiment. The comparison shows that the proposed modeling method is accurate and reliable.展开更多
文摘缸筒锅式流体阻尼器(Cylinder Pot Fluid Damper)简称为阻尼锅,广泛应用于工业管道减振装置中。这类阻尼器构造简单、没有方向限制,且一般不存在漏油问题。这种与高压密封的常规阻尼器不同的构造,使其在发明并应用的同时就形成了另一个流体阻尼器的分支:即在一个容器内放置粘滞液体,通过一个可活动的"杆"上下或左右移动,靠侧面液体剪切摩擦和底部受压产生一定的阻尼作用。目前这种产品动力性能的研究在我国较为少见。美国国家地震工程研究中心(NCEER)在上世纪90年代初对该产品进行了详细研究,并给出了符合产品性能的理论表达式。研究结果显示:缸筒流体阻尼器是一种对频率和温度极为敏感、参数几乎无法预知的缓冲装置,因而这种产品的使用有一定局限性,特别是用于对频率、温度以及耐久性要求极高、需要定量分析的结构减振TMD中。由于这种产品特性被人忽视,近些年在一些TMD工程中得到应用,但其是否适宜应用在大型TMD中仍值得推敲。
文摘On the basis of the piezoelectric theory, Mindlin plate theory, viscoelastic theory and ideal fluid equation, the finite element modeling of a fluid-filled cylindrical shell with active constrained layer damping (ACLD) was discussed. Energy methods and Lagrange’s equation were used to obtain dynamic equations of the cylindrical shell with ACLD treatments, which was modeled as well with the finite element method. The GHM (Golla-Hughes-McTavish) method was applied to model the frequency dependent damping of viscoelastic material. Ideal and incompressible fluid was considered to establish the dynamic equations of the fluid-filled cylindrical shell with ACLD treatments, Numerical results obtained from the finite element analysis were compared with those from an experiment. The comparison shows that the proposed modeling method is accurate and reliable.
