摘要
特高压输电线路导线微风振动对线路的破坏日趋明显,基于此,采用有限质点法对导线的微风振动响应进行研究。通过采用构件的点值描述,将构件离散为质点,质点与质点之间通过单元连接,质点的运动遵循牛顿第二定律,并通过中心差分法求解质点的运动来追踪构件的行为。计算发现,有限质点法能考虑输电线质量、几何非线性的影响,计算结果更加真实。最后,采用有限质点法计算了不同风激励条件下导线微风振动的响应,且计算分析结果与能量平衡法的结果基本吻合,表明有限质点法的正确性。
In allusion to the problem of increasingly damage to lines by aeolian vibration of ultrahigh voltage transmission conductors, this paper uses finite particle （FPM） to study aeolian vibration. Point value description is used to disperse structures into particles and particles are linked by elements. Movement of particles should follow Newton＇s second law and the central differential method is used for solving movement of particles so as to tracking action of structures. Calculation discovers FPM considers influence of qualities of power transmission lines and geometric nonlinear, which can make calculation results more authentic. Finally, FPM is used to calculate response of aeolian vibration of conductors under different wind excitation conditions and the result is basically identical to that of energy balance method （EBM）, which proves validity of FPM.
出处
《广东电力》
2016年第10期127-132,共6页
Guangdong Electric Power
基金
中国南方电网有限责任公司科技项目(GDKJ00000014)
关键词
微风振动
能量平衡法
有限质点法
向量式构件力学
aeolian vibration
energy balance method （EBM）
finite particle method （FPM）
vector mechanics of structure
