高速磁浮道岔振动响应的原位实测

In Situ Research of Dynamic Response of Maglev Turnout

道岔是磁悬浮线路的重要部件.以上海浦东高速磁浮交通示范线为背景,对6种工况下道岔箱梁跨中截面、支承截面等进行了动力响应原位实测,采集道岔的加速度响应.采用最小二乘修正积分,得到道岔的位移响应.磁浮列车低速(20 km/h)行驶时,道岔梁竖向响应大且呈“拍振”特征;高速行驶时,道岔竖向位移小且沿轴向分布均匀.支墩跨度对道岔振动响应影响显著.

Turnout is an important part of maglev. Through field work, the dynamic response of mid-span and support cross section under six operating modes was researched, Displacement response was obtained by modified integration. Vertical resonance happens when maglev vehicle runs at 20 km/h. The vertical displacement becomes smaller as the vehicle goes faster. The length of beam span has obvious influence on the dynamic character of turnout.