Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Tuned mass inerter damper for inhibiting low-frequency vortex-induced vibration of large-span bridge
The invention belongs to the technical field of bridge wind-induced vibration control, and provides a tuned mass inerter damper for suppressing low-frequency vortex-induced vibration of a large-span bridge in order to solve the problems that a spring of a traditional tuned mass damper for controlling low-frequency vortex-induced vibration is too long and too heavy and the manufacturing cost is too high. A small-mass and large-diameter rotor is introduced to greatly improve the equivalent mass of a vibration system; therefore, the spring length is greatly shortened, the spring rigidity is improved, and the dead weight, static elongation or compression amount and manufacturing cost of the spring are greatly reduced; the extension spring can be designed and processed to have specified initial stress, so that the static elongation of the extension spring under the gravity action of the mass body is further reduced, and the mounting space is saved; the material, the structure and the arrangement form of the mass body are not limited, so that the cost is greatly reduced compared with that of a traditional tuned mass damper; the clear height in a box of a box girder of a large-span bridge is generally higher than 3m, the damper can reach the low-frequency level of 0.1 Hz through optimization design, and an efficient and practical means is provided for vortex-induced vibration control of a main-span kilometer-level bridge.
本发明属于桥梁风致振动控制技术领域，针对控制低频涡激振动传统调谐质量阻尼器存在弹簧过长、过重，造价过高的问题，提供了一种抑制大跨桥梁低频涡激振动的调谐质量惯容阻尼器，其引入一个小质量、大直径转子用于大幅提高振动系统的等效质量；由此大幅缩短弹簧长度、提高弹簧刚度，进而大幅降低弹簧自重、静伸长或压缩量、造价；拉伸弹簧可设计、加工具有指定的初应力，由此进一步降低其在质量体重力作用下静伸长量，节省安装空间；质量体材料、构造及布置形式不限，因此费用相对传统调谐质量阻尼器大幅降低；大跨桥梁箱形主梁箱内净高一般高于3m，本阻尼器经优化设计可达到0.1Hz低频水平，为主跨千米级桥梁涡振控制提供一种高效实用手段。
Tuned mass inerter damper for inhibiting low-frequency vortex-induced vibration of large-span bridge
The invention belongs to the technical field of bridge wind-induced vibration control, and provides a tuned mass inerter damper for suppressing low-frequency vortex-induced vibration of a large-span bridge in order to solve the problems that a spring of a traditional tuned mass damper for controlling low-frequency vortex-induced vibration is too long and too heavy and the manufacturing cost is too high. A small-mass and large-diameter rotor is introduced to greatly improve the equivalent mass of a vibration system; therefore, the spring length is greatly shortened, the spring rigidity is improved, and the dead weight, static elongation or compression amount and manufacturing cost of the spring are greatly reduced; the extension spring can be designed and processed to have specified initial stress, so that the static elongation of the extension spring under the gravity action of the mass body is further reduced, and the mounting space is saved; the material, the structure and the arrangement form of the mass body are not limited, so that the cost is greatly reduced compared with that of a traditional tuned mass damper; the clear height in a box of a box girder of a large-span bridge is generally higher than 3m, the damper can reach the low-frequency level of 0.1 Hz through optimization design, and an efficient and practical means is provided for vortex-induced vibration control of a main-span kilometer-level bridge.
本发明属于桥梁风致振动控制技术领域，针对控制低频涡激振动传统调谐质量阻尼器存在弹簧过长、过重，造价过高的问题，提供了一种抑制大跨桥梁低频涡激振动的调谐质量惯容阻尼器，其引入一个小质量、大直径转子用于大幅提高振动系统的等效质量；由此大幅缩短弹簧长度、提高弹簧刚度，进而大幅降低弹簧自重、静伸长或压缩量、造价；拉伸弹簧可设计、加工具有指定的初应力，由此进一步降低其在质量体重力作用下静伸长量，节省安装空间；质量体材料、构造及布置形式不限，因此费用相对传统调谐质量阻尼器大幅降低；大跨桥梁箱形主梁箱内净高一般高于3m，本阻尼器经优化设计可达到0.1Hz低频水平，为主跨千米级桥梁涡振控制提供一种高效实用手段。
Tuned mass inerter damper for inhibiting low-frequency vortex-induced vibration of large-span bridge
一种抑制大跨桥梁低频涡激振动的调谐质量惯容阻尼器
XU FUYOU (Autor:in) / WANG BO (Autor:in) / ZHANG ZHANBIAO (Autor:in) / ZHANG MINGJIE (Autor:in)
27.09.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken