The Rigid-flexible Coupling Dynamic Simulation Analysis Of 450T Schnabel Wagon

With the rapid development of the national economy and the implementation of the western development strategy, in particular the building of the Three Gorges Hydropower Station and the Western electricity transmission and other key project of the East have started on the large and increasing demand for very large equipment in urgent need special freight wagons to meet the special railway transportation needs.450 tons of Schnabel Wagon (Series models DQ45) is a new development of large-scale special wagons to meet the Three Gorges Hydropower Station large-scale power generation equipment transport needs. The role of the body using friction to achieve the two together hanging Type: tare short-trailer and laden long-trailer,laden long-trailer associated bodies, including weight, clamp-holding girder, side-bearing girder , the clamp-holding girder uses the ears of Schnabel wagon and pressure tank columns to press the weight, and a safety pin clamp restrictions on the relative weight of the clamp-holding girder, DQ45 uses three kinds of guiding manners: inner-guiding,mid-guiding and out-guiding. In order to reduce the side-torsion deformation of car body when running on transition sections between straight and round lines, the technology of hydraulic side-bearing (SB) is applied, in which the SB cylinders on the same side are connected. Since the Schnabel wagon is very large, how to ensure security and stability of its run-time becomes very important ,so combine the structural characteristics of DQ45, using the template-based modeling techniques to build a vehicle rigid-flexible coupling models to do the flexible coupling dynamic simulation analysis. In order to solve multi-body dynamics and structural dynamics system integration problems of scale, to meet the rigid-flexible coupling dynamic simulation accuracy requirements, using a flexible body interface processing measures. In order to solve the friction caused by discrete simulation problem using a continuous friction calculation model. In the straight-top Wedge force analysis bases on the establishment of an axis, 3 axis axle suspension changing friction. Due to over-constraint and friction constraints clamp beam static deformation complex, divided according to stress analysis of complex constraints as the main constraints (such as location constraints) and the secondary constraints (such as local enhanced constraints). With minimal binding mode to achieve the main constraint, supporting the use of elastic internal force constraint approximation bound.This topic is in the 350 tons of Schnabel wagon of experience successfully develops a variety of complex lines on the conditions of rigid-flexible coupling dynamic simulation, not only improves the force level of the center bowl and side bearing, but also in the wheel-rail safety, clamp-holding girder deflection deformation dynamic stress change with the progress. Dynamic simulation results show that: the structural design of DQ45 can guarantee the stability of clamp-holding girder and heavy, but there are 2,3-bit four-axis bias bogie contained in the framework of the problem, for which, by comparing simulation proposed increasing load Saddle traverse the safety of technical countermeasures, and suggested that slow the passage of small radius curve adopted, they have been test line verification.