The Structural Stability Analysis Of High-speed Railway Erector

In recent years, high-speed railway construction has been hotted in China, By 2020, Over 200 km per hour high-speed railway construction will be more than 18,000 km, total more than half of the world's High-speed railway mileage. Looking at our current high-speed railway construction,900-ton Erector is one of the major mechanical equipment highly efficient railway line indispensable in the process, the safety design of the structure is placed in front of the most important designers.Strength, stiffness, fatigue and stability as structural design of the four key indicators, the first three have already become perfect, can come fast and accurate results. The stability of the structure mostly remain in the experience, more often limited to manual calculations, design and low efficiency, how to improve the efficiency of design is a problem. In addition, there are a lot of times for this question: will the structure of the overall stability and local stability are considered separately. Buckling analysis of structural integrity, without regard to the instability of local components; analysis of local instability, do not take into account the overall instability of the structure, ignoring the overall instability of the structure of local instability and the mutual influence. For the important components, lack of rapid and accurate stability method.This Dissertation take JQ900A type Erector as research object, Using the finite element analysis software ANSYS to simulate the structure. In the strength calculation of the premise, the first use of the European crane design manual on structural stability of the calculation of check. Then using ANSYS buckling analysis module, respectively erecting machine on the 1st column and the main beam buckling stability analysis and evaluation. Main tasks are as follows:1) Analysis of the JQ900A type Erector operating process and working conditions of load analysis and load combinations according to their conduct;2) Use ANSYS own various units to model the structure, and take metal structure strength and stiffness analysis for the JQ900A type Erector;3) Extraction strength calculation of the corresponding data, using the theoretical formula of F.E.M, With JQ900A type Erector of the 1st column and the main beam for the study, were explained the structure of local stability and the overall stability of the calculation method;4) Use ANSYS software of the buckling analysis module, using plate elements, beam elements were on the 1 st column on the eigenvalue analysis, obtained the impact factors for overall instability and local instability and the relevant connection between the two;5) Use of mixed elements of the plate and beam unit for the Erector main beam stability analysis, finite element method with a fast and accurate solution to find the main beam local buckling critical load and buckling modes, which include the plate and beam elements the correct docking, in order to obtain the most accurate boundary condition; and on this basis, the analysis of longitudinal bars and diaphragm on the impact of the local instability.