铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
2期
128-133,137
,共7页
接触网%力学模型%定位装置
接觸網%力學模型%定位裝置
접촉망%역학모형%정위장치
Catenary%Mechanical model%Steady device
接触网既是供电的线路，又是受电弓的滑道，其结构为三维柔性索网，当受电弓通过时，支持点和张力补偿点不存在瞬时大位移，其动态行为可以忽略，定位点由于存在非线性铰接，定位点处的动态行为不能被忽略。为等效定位点的动态行为，通过静力学分析，简化三维力学模型，将定位装置的三维非线性铰接等效为二维线性弹簧，并推导弹簧的等效刚度值计算公式，得到接触网二维力学模型。最后通过仿真实例，验证接触网二维力学模型的静态和动态效果与接触网三维模型完全吻合，并确认定位装置等效刚度的计算方法。
接觸網既是供電的線路，又是受電弓的滑道，其結構為三維柔性索網，噹受電弓通過時，支持點和張力補償點不存在瞬時大位移，其動態行為可以忽略，定位點由于存在非線性鉸接，定位點處的動態行為不能被忽略。為等效定位點的動態行為，通過靜力學分析，簡化三維力學模型，將定位裝置的三維非線性鉸接等效為二維線性彈簧，併推導彈簧的等效剛度值計算公式，得到接觸網二維力學模型。最後通過倣真實例，驗證接觸網二維力學模型的靜態和動態效果與接觸網三維模型完全吻閤，併確認定位裝置等效剛度的計算方法。
접촉망기시공전적선로，우시수전궁적활도，기결구위삼유유성색망，당수전궁통과시，지지점화장력보상점불존재순시대위이，기동태행위가이홀략，정위점유우존재비선성교접，정위점처적동태행위불능피홀략。위등효정위점적동태행위，통과정역학분석，간화삼유역학모형，장정위장치적삼유비선성교접등효위이유선성탄황，병추도탄황적등효강도치계산공식，득도접촉망이유역학모형。최후통과방진실례，험증접촉망이유역학모형적정태화동태효과여접촉망삼유모형완전문합，병학인정위장치등효강도적계산방법。
The catenary serves for power supply and as a path for pantograph sliding, When a pantograph is passing by, there is no large instant displacement at the support points and the tension compensation points, therefore the dynamic behavior can be ignored on account of its three-dimensional soft wire structure . However, the dynamic behavior at the fixing points cannot be ignored because of the non-linear hinge. To obtain the equivalent dynamic behavior of the fixing points, the three-dimensional mechanical model is simplified by static analysis, which converts the three-dimensional nonlinear hinge into a two-dimensional linear spring, and then the formula to calculate equivalent stiffness of the spring is derived and the two-dimensional mechanical model of the catenary is established. Finally, the static and dynamic effects of the two-dimensional mechanical model of the catenary are proved with simulation in full agreement with that of the three-dimensional mechanical model of the catenary, and the method to calculate the equivalent stiffness of the steady device is confirmed.
