Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bidirectional variable stiffness particle tuned quality damper
The invention relates to a bidirectional variable stiffness particle tuned quality damper, which comprises a damper cavity, particle swarms, buffer materials, a variable stiffness spring, rolling balls and a fixed structure; the damper cavity is of a cuboid or cylinder structure, and is divided into multiple pieces in the horizontal or/and vertical direction(s) to form a plurality of damper cavity units; a layer of particles swarms is laid in each damper cavity unit; in the horizontal direction, the outer frame of the damper cavity is connected with the fixed structure through the variable stiffness spring; the variable stiffness spring is bidirectionally and orthogonally arranged; stiffness is determined according to vibrational frequencies of different structures in different directions, and the variable stiffness spring is a nonlinear spring; the rolling balls are arranged at the lower part of the damper cavity, and can do friction-free rolling in the horizontal plane; by reasonably setting the stiffness of the spring, different stiffness can be provided in different directions in the horizontal plane so as to tune the frequencies of the structures. Under the action of wind or/and earthquake action, different stiffness tuned frequencies are provided in two orthogonal directions by the damper and the stiffness nonlinearly varies; meanwhile, the kinetic energy of a basic structure is transferred and dissipated through rolling, sliding, friction and collision of the particle swarms, and after the buffer materials are additionally arranged, the energy dissipated by the collision can be especially increased.
Bidirectional variable stiffness particle tuned quality damper
The invention relates to a bidirectional variable stiffness particle tuned quality damper, which comprises a damper cavity, particle swarms, buffer materials, a variable stiffness spring, rolling balls and a fixed structure; the damper cavity is of a cuboid or cylinder structure, and is divided into multiple pieces in the horizontal or/and vertical direction(s) to form a plurality of damper cavity units; a layer of particles swarms is laid in each damper cavity unit; in the horizontal direction, the outer frame of the damper cavity is connected with the fixed structure through the variable stiffness spring; the variable stiffness spring is bidirectionally and orthogonally arranged; stiffness is determined according to vibrational frequencies of different structures in different directions, and the variable stiffness spring is a nonlinear spring; the rolling balls are arranged at the lower part of the damper cavity, and can do friction-free rolling in the horizontal plane; by reasonably setting the stiffness of the spring, different stiffness can be provided in different directions in the horizontal plane so as to tune the frequencies of the structures. Under the action of wind or/and earthquake action, different stiffness tuned frequencies are provided in two orthogonal directions by the damper and the stiffness nonlinearly varies; meanwhile, the kinetic energy of a basic structure is transferred and dissipated through rolling, sliding, friction and collision of the particle swarms, and after the buffer materials are additionally arranged, the energy dissipated by the collision can be especially increased.
Bidirectional variable stiffness particle tuned quality damper
LU ZHENG (Autor:in) / WANG TIANCHAO (Autor:in)
06.05.2015
Patent
Elektronische Ressource
Englisch
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