竖弯涡振控制的调谐质量阻尼器TMD参数优化设计

针对传统调谐质量阻尼器(TMD)的参数优化方法中无法考虑涡激气动力的气动阻尼和气动刚度效应这一问题,通过"类半带宽法"识别线性涡激力模型中相关气动参数,提出考虑涡激力气动阻尼和气动刚度效应的TMD参数优化设计理论模型.以厦漳跨海大桥为工程背景优化设计了用于涡振控制的TMD参数,研究涡激力气动阻尼和气动刚度对TMD最优频率比和阻尼比的影响,并通过风洞试验验证了TMD的涡振控制效果.研究发现,涡激力的气动阻尼和气动刚度效应会对用于涡振控制的TMD最优频率比和阻尼比产生一定的影响,从而影响最终的涡振控制效果.

Parameter optimization of TMD for vortex-induced vibration control

The aerodynamic damping and aerodynamic stiffness effects in the vortex-induced vibration cannot be considered in the optimizing parameters of tuned mass damper(TMD) based on the traditional theory.Aiming at the problem,the aerodynamic parameters of the linear vortex-induced force model were identified by using the half-power bandwidth method.A theoretical model for optimizing parameters of TMD considering the aerodynamic damping and aerodynamic stiffness was proposed.Taking the Xiazhang Sea-Cross Bridge as a numerical example,the influences of the aerodynamic damping and aerodynamic stiffness to the optimal frequency ratio and damping ratio of TMD were analyzed.The wind tunnel test was also conducted to check out the control effects of TMD.Results show that the aerodynamic damping and aerodynamic stiffness may affect the optimal frequency ratio and damping ratio of TMD,subsequently the control effects.