Abstract
The numerical tools can be used to facilitate the design of the railway pantograph‐catenary system. The validation of the current numerical results is mostly performed at a speed slower than 350 km/h. This paper aims at the validation and analysis of the numerical results at a super‐high‐speed. The catenary model is constructed based on a nonlinear finite element approach employing the absolute nodal coordinate formulation. A multibody dynamics model is adopted to represent the pantograph. The measurement data are collected by an inspection vehicle equipped with an instrumented pantograph operating at 378 km/h in Chengdu‐Chongqing high‐speed line. Comparing the numerical simulation and the field test shows that the present pantograph‐catenary model can provide reliable numerical results at 378 km/h. The numerical analysis of pantograph‐catenary interaction at super‐high‐speed shows that the trailing pantograph performance does not comply with the assessment standard at 378 km/h. The adjustment of double‐pantograph interval and messenger wire tension can effectively improve the trailing pantograph performance.
Highlights
A two-dimensional geometry of a pantograph is presented in Figure 2, in which F, G, and P are the centers of mass of the lower link, lower arm, and upper arm, respectively. m1, m2, and m3 are their respective masses; J1, J2, and J3 are the corresponding moments of inertia; l1, l2, and l3 are the corresponding lengths for each part; l4 is the length of CD; l5, l6, and l7 are the lengths of FA, GB, and PC respectively; CA, CB, CC and z fc kh mh zh (t) ch
It shows that the pre-sag obtained by the present method is precisely the same as the benchmark. e maximum error of the elasticity is just 6.52%. e dynamic validation is implemented by introducing a lumped mass pantograph model operating at 320 km/h. e contact force statistics are compared with the benchmark in Table 2. e most significant error only reaches 6.9% for the minimum contact force, which is still smaller than the threshold
An instrumented pantograph is mounted on a high-speed inspection vehicle operating at 378 km/h in China high-speed network
Summary
Due to the high cost of a field test, numerical modelling has been the most popular approach to study the interaction performance of pantograph-catenary, to guarantee numerical accuracy has been an urgent issue to both the scientific community and the practical industry. E numerical modelling technique of pantograph-catenary has experienced rapid development as the ever-increasing demand for the speed upgrade [6]. In [43], the simulation results were compared with several experimental tests to validate the contact force standard deviation. It is seen from the literature review that the numerical simulations of pantograph-catenary were seldom performed and validated at a super-highspeed. An optimization approach is proposed to improve the current collection quality based on a validated numerical model
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