Windmill rail bridge coupling model and on-bridge travelling crane criterion formulation method

Abstract

The invention discloses a windmill rail bridge coupling model and an on-bridge travelling crane criterion formulation method. The windmill rail bridge model comprises a wind submodel, a train submodel, a rail submodel and a bridge submodel, wherein each submodel forms wind-train-rail-bridge coupling system through the mutual function of a windmill, a wind bridge, a wheel rail and a bridge rail; anexplicit and implicit mixed integral method is adopted to solve the dynamic response of a system, a relation curve of a train speed-wind speed threshold value is obtained according to a correspondingevaluation index so as to formulate a corresponding travelling crane criterion. The windmill rail bridge coupling model has the beneficial effects that a dynamic wheel rail contact relation between wheel rails is fully considered, the modeling of the static and dynamic aerodynamic characteristics of the rail structure, the bridge, the wind and the axle system is finished according to a practicalstate, the refinement, the integrity and the accuracy of the model are improved so as to obtain a reliable and true system dynamic response value, a scientific basis can be provided for formulating the safety evaluation and the travelling crane criterion of on-bridge travelling crane under gale atmosphere, and therefore, the windmill rail bridge model has a high theoretical value and engineering application prospect.

Description

technical field [0001] The invention relates to the technical field of railway train driving safety, in particular to a windmill-rail-bridge coupling model and a method for formulating wind-resistant driving criteria on the bridge. Background technique [0002] Train running safety is one of the most important cores of railway traffic. Strong winds will not only reduce the running stability of the train, but also reduce the running safety of the train and even cause the train to derail. Since the beginning of railway transportation in 1872, railway vehicle accidents caused by wind have occurred frequently in the world, seriously endangering traffic and personnel safety. Under the action of cross wind, the aerodynamic characteristics of the train vehicle will change significantly, which will significantly change the aerodynamic load and wheel-rail contact force of the train, thereby affecting its wheel-rail dynamic characteristics, and even causing the train to derail or over...

AI Technical Summary

Problems solved by technology

In terms of the aerodynamic characteristics of the vehicle-bridge system, most of the current research is still at the level of the two-dimensional static flow around the interaction of the static geometry of the train and the bridge, which cannot reflect the real relative motion of the train and the bridge.

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