基于风速概率分布的防振锤安装位置计算

为更好地控制架空输电线的微风振动,研究防振锤安装位置的优化计算方法是非常必要的。通过分析架空输电线微风振动的随机性特点,根据风速与输电线振动频率之间的关系,由风速的概率分布求出了输电线振动频率的概率分布,提出用计算加权振幅比的方法,来考虑微风振动的危险振动频率范围以及各振动频率出现的概率,实现防振锤安装位置的优化计算。最后,通过对一个实际工程的计算验证了该方法的有效性。该方法可用于输电线防振锤安装位置的优化计算。

CALCULATION OF INSTALLING POSITIONS OF DAMPER BASED ON PROBABILITY DISTRIBUTION OF WIND SPEED

Optimization for positions of damper on aerial conductors is very important to reduce the severity of aeolian vibration. After analyzing stochastic characteristics of aeolian vibration, the probability distributions of vibration frequencies of transmission lines are obtained according to the relation between wind speed and vibration frequency of aerial conductors. Then, a numerical calculation method about installing positions of dampers on transmission lines by calculating the weighted amplitude ratio is proposed, it can take danger vibration frequency range and probability distribution of vibration frequencies into account. At last, a practical engineering is computed adopting this method, the computation result show that the proposed method is effective. So a new calculation method for optimizing the locations of damper is given.