## Analysis of the structure of steel plant motorized aluminium coil rail transfer carrier bottom frame

2018-01-26
Basic parameters of steel plant motorized aluminium coil rail transfer carrier car and large chassis structural steel ladle car hire for the line quality accords with national standard gauge and above railway, electric power, metallurgy, chemical industry equipment is mainly used for shipment and heavy machinery, large castings and forgings and other large and heavy goods.

The large chassis of ladle car adopts welding structure, which is mainly composed of side beam, pillow beam, large beam, small beam and floor.The large base material of ladle car is mainly low alloy structural steel, and high strength steel is used for the cover plate and web plate under the sleeper beam.The calculation basis and calculation software are calculated according to the requirements of railway vehicle strength design and test specification and the basic parameters of the vehicle.The calculation model and boundary condition calculation model take into account the symmetry of the large chassis of the ladle in its structure and load, and take the calculation of the one-fourth model steel plant motorized aluminium coil rail transfer carrier model.Because the large chassis of the ladle is mainly welded by the plate, the four-node plate shell element is adopted to divide the grid, and the triangular element transition is adopted locally.The discrete result of the model is that the overall unit scale is 30mm and the local unit is encrypted.

Calculated based on the calculation for the strength design and test appraisal regulations for railway cars, a total of 8 kinds of working condition of calculating

**comprehensive review the structure strength of large ladle car chassis, the working condition of 8 kinds of calculation are**:
(1) the self-weight is applied in the structure of the structure;

(2) load, all of which are located on the side girders of the four rectangular areas with the width of 8m and width of 800;

(3) vertical static load = self-heavy load;

(4) the vertical total load is the vertical dynamic load coefficient, and the influence of the lateral force is replaced by the increase of 0.1 x vertical static load;

(5) longitudinal tensile load, which ACTS on the center plate of the large chassis;

(6) the longitudinal compression load is 1390kN, which ACTS on the center plate of the large chassis;

(7) vertical total load longitudinal tensile load;

(8) the longitudinal compressive load boundary condition of the vertical total load is for the convenience of analysis, and the vertical axis, horizontal axis and vertical axial direction are taken, and the line displacement and angular displacement along the axis are set.

**The constraint conditions of the model are**: the longitudinal line displacement of the upper center plate is restricted, and the transverse symmetric surface of the large chassis of the ladle is symmetrical and symmetrical.Symmetric constraint is applied to the longitudinal symmetry plane of the large chassis of ladle.The center plate is simulated by beam element.Large calculation parameters of the ladle car chassis by steel plant motorized aluminium coil rail transfer carrier car USES most of the material, the material parameters are as follows: elastic modulus close the poisson's ratio materials: according to the requirement of strength design and test appraisal regulations for railway vehicle, this paper ladle car ladle car chassis structure are calculated, and the software to analyze the stress, deformation, manufacturing informationization.

**Calculation results and analysis**: the stress analysis of the main bearing part of the large base frame is the side beam, so the stress of the side beam and the occipital beam is investigated in this calculation.For the above 1~8 working conditions, the large chassis structure of the ladle truck has maximum stress at the 8th working condition, namely the vertical total load longitudinal compression load, and the maximum stress is the circular edge of the heart disk.The overall stress distribution under the 8th condition is the maximum stress in the lateral beam.The maximum stress of the cover plate under the pillow is 301MPa, at the edge of the heart plate.The maximum stress of an steel plant motorized aluminium coil rail transfer carrier plate on the sleeper girder is located on the outside of the strengthening ring of the web.Large deformation and stiffness analysis of the ladle car chassis under vertical static load (3 cases), the structure of the whole deformation of the central maximum vertical deflection of the section as appeared in the middle of the large ladle car chassis plate near the place.

According to the strength design and test appraisal regulations for railway cars, with maximum vertical deflection and large ladle car chassis structure of two heart center from the ratio of s as large ladle car chassis scratch across than steel plant motorized aluminium coil rail transfer carrier car, to assess the vertical bending stiffness.Conclusion the maximum stress of lateral beam is less than allowable stress under vertical compression condition.The maximum stress of the sleeper beam is less than the allowable stress, which meets the requirement of rigidity.