Novel high speed pantograph and lightweight dynamic design method thereof

Abstract

The invention discloses a novel high speed pantograph and lightweight dynamic design method thereof. Optimization of bogie parameters is led according to a root locus diagram, the dynamic action of the contact rail of an abrasion wheel is lowered, under the condition of uniform/normative wheel rail profile matching, the limiting speed is improved up to 480 km/h; through optimal design of rubber suspension parameters of equipment under a vehicle, the transverse vibration mass of hostling flexible vehicle body is decreased, and under reasonable and scientific repair program and repair system, the construction speed is increased up to 400 km/h. In order to better count input stimulus formed by high speed pantograph net contact, a fully flexible pantograph landing model and a hostling vehiclerigid flexible coupling simulation model are systematically integrated to construct a wheel rail pantograph net double coupling simulation technology platform. According to complex constraint and accurate analyze of internal force, analysis of a typical case indicates that a novel lightweight design form is needed by an ultra-high speed pantograph, namely the hinging constraint force between an upper arm and a lower arm and the dynamic load effect are reasonably dispersed and reduced through a duck-egg-shaped joint structure, and thus high cycle fatigue is transformed to a static strength problem.

Description

Technical field [0001] The invention belongs to the technical field of rail vehicle design, and particularly relates to a novel high-speed pantograph based on wheel-rail-bow-net dual coupling and a lightweight dynamic design method thereof. Specifically, taking into account the three main uncertainties of the wearing wheel-rail contact dynamics, the transverse friction disturbance caused by the wear of the carbon sliding plate, and the related fluid-solid coupling effect, the ultra-high-speed pantograph needs a new lightweight design form, which is reasonable Disperse the upper arm and lower arm articulated restraining internal force and reduce its dynamic load effect, effectively avoiding high cycle fatigue failure. Background technique [0002] Wheel / rail wear is currently one of the technical bottlenecks in the world's high-speed rail operation and maintenance. If the worn wheel-rail contact deviates from the (near) linear relationship, its dynamic effect is one of the main r...

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Problems solved by technology

Specifically, the inhomogeneity of the contact stiffness forces a thermodynamically nonlinear effect on the bowhead air suspension as the locator pass...

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