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Counterweight lever type negative stiffness friction damper
The invention relates to a counterweight lever type negative stiffness friction damper, and belongs to the technical field of vibration control. The counterweight lever type negative stiffness friction damper comprises a top steel plate, a bottom steel plate, a side support plate, a balancing weight, a first-stage lever, a connecting rod, a second-stage lever, a rotating rod, a friction plate anda friction piece. In an initial state, the gravity of the balancing weight is amplified for the first time through the first-stage lever, the amplified gravity is transmitted to the second-stage leverthrough the connecting rod so as to be amplified for the second time, and the amplified gravity vertically extrudes the friction plate through the rotating rod; when the damper enters a working stage, the friction plate deviates from a balance position, and the rotating rod generates a horizontal component which enables the damper to deviate from the balance position, i.e. negative stiffness force is generated; and additionally, the rotating rod has a vertical component which is perpendicular to the friction plate, so that friction force is generated, friction damping is provided, and the rotating rod and the friction plate act simultaneously so as to generate a hysteretic curve with negative stiffness characteristics. According to the counterweight lever type negative stiffness frictiondamper, the structural damping can be improved while the structural stiffness is reduced, and wide application prospects are obtained.
本发明涉及一种配重杠杆式负刚度摩擦阻尼器，属于振动控制技术领域。包括顶部钢板、底部钢板、侧支撑板、配重块、第一级杠杆、连接杆、第二级杠杆、转杆、摩擦板、摩擦片。初始状态时配重块的重力通过第一级杠杆对重力进行第一次放大，通过连接杆将放大的重力传到第二级杠杆进行第二次放大，放大后的重力通过转杆垂直挤压摩擦板；当阻尼器进入工作阶段时，摩擦板偏离平衡位置，转杆产生使阻尼器偏离平衡位置的水平分量，即产生负刚度力；同时由于转杆有垂直于摩擦板的竖直分量使其产生摩擦力，提供摩擦阻尼，二者同时作用产生具有负刚度特性的滞回曲线。本发明可实现降低结构刚度的同时提高结构阻尼，具有非常广阔的应用前景。
Counterweight lever type negative stiffness friction damper
The invention relates to a counterweight lever type negative stiffness friction damper, and belongs to the technical field of vibration control. The counterweight lever type negative stiffness friction damper comprises a top steel plate, a bottom steel plate, a side support plate, a balancing weight, a first-stage lever, a connecting rod, a second-stage lever, a rotating rod, a friction plate anda friction piece. In an initial state, the gravity of the balancing weight is amplified for the first time through the first-stage lever, the amplified gravity is transmitted to the second-stage leverthrough the connecting rod so as to be amplified for the second time, and the amplified gravity vertically extrudes the friction plate through the rotating rod; when the damper enters a working stage, the friction plate deviates from a balance position, and the rotating rod generates a horizontal component which enables the damper to deviate from the balance position, i.e. negative stiffness force is generated; and additionally, the rotating rod has a vertical component which is perpendicular to the friction plate, so that friction force is generated, friction damping is provided, and the rotating rod and the friction plate act simultaneously so as to generate a hysteretic curve with negative stiffness characteristics. According to the counterweight lever type negative stiffness frictiondamper, the structural damping can be improved while the structural stiffness is reduced, and wide application prospects are obtained.
本发明涉及一种配重杠杆式负刚度摩擦阻尼器，属于振动控制技术领域。包括顶部钢板、底部钢板、侧支撑板、配重块、第一级杠杆、连接杆、第二级杠杆、转杆、摩擦板、摩擦片。初始状态时配重块的重力通过第一级杠杆对重力进行第一次放大，通过连接杆将放大的重力传到第二级杠杆进行第二次放大，放大后的重力通过转杆垂直挤压摩擦板；当阻尼器进入工作阶段时，摩擦板偏离平衡位置，转杆产生使阻尼器偏离平衡位置的水平分量，即产生负刚度力；同时由于转杆有垂直于摩擦板的竖直分量使其产生摩擦力，提供摩擦阻尼，二者同时作用产生具有负刚度特性的滞回曲线。本发明可实现降低结构刚度的同时提高结构阻尼，具有非常广阔的应用前景。
Counterweight lever type negative stiffness friction damper
配重杠杆式负刚度摩擦阻尼器
SUN TIANWEI (author) / PENG LINGYUN (author) / GUAN YAXI (author)
2021-02-26
Patent
Electronic Resource
Chinese
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