新型阻尼器凸轮式响应放大装置的作用机理与恢复力模型

Action mechanism and restoring force model of a new cam-type response amplification device of damper

针对现有阻尼器响应放大技术的不足,提出一种新型阻尼器凸轮式响应放大装置,介绍该装置的构造及作用机理,推导该装置的恢复力计算公式,给出理论恢复力模型以及位移、速度、力等响应放大的计算公式;推导串联黏滞阻尼器的凸轮式响应放大装置的恢复力计算公式,进行伪静力试验与理论公式的对比。结果表明:装置凸轮式往复运动的特点能够保证串联阻尼器的位移在各级地震作用下均不会失效;所具备的响应放大效应能够充分发挥阻尼器的耗能能力,可以通过组合使用小吨位阻尼器达到直接安装大吨位阻尼器相同的耗能效果,从而取得显著的经济效益,在建筑、桥梁等结构振动控制领域具有良好的研究和应用前景。

In view of the shortcomings of the existing damper response amplification technology, a new Cam-type Response Amplification Device of damper was proposed. The structure and action mechanism of the device were introduced, the calculation formula for restoring force of the device was deduced, and the theoretical restoring force model and calculation formulas for the response amplification of displacement, velocity, force, etc., were given. The calculation formula for restoring force of Cam-type Response Amplification Device of viscous dampers in series connection was given, and the comparative analysis of pseudo-static test and theory was performed. The results show that the characteristic of reciprocating motion of the Cam-type device can ensure that the displacements of the dampers in series connection may not fail under all levels of earthquake actions, the response amplification effect can fully exploit the energy dissipation capability of the damper to achieve the same energy dissipation capacity of large-tonnage damper by the combined use of small-tonnage dampers, so that remarkable economic benefits can be attained. The new device shall be promising for the vibration control of structures such as buildings and bridges.