Simulation Research On Leveling Control Of Railway Crane Curve Track

China as a population of 1.4 billion and 9.6 million square kilometers of a large country,the distribution of natural resources and the layout of the country there is a great imbalance,the need for transport capacity of the vehicles to solve this problem.For land transport,railway transport preferred: railway transport not only strong transport capacity and transport costs are relatively low,can meet the requirements of a large number of transport.Therefore,China has been vigorously developing railway transport,railway transport as the main artery of national economic development.Ensuring transport safety and unimpeded is the main standard requirement of railway transport work.Therefore,the railway rescue work should take positive attention,railway crane as an important tool in the railway rescue work to ensure that the rescue,to ensure the load and speed at the same time safety is the most important point.According to the characteristics of railway rescue crane: compared with ordinary locomotive,railway rescue crane has the characteristics of large load and high center of gravity.When running on the curve track with ultra-high outer rail,leveling control is needed to ensure the safety of operation.In order to accurately simulate it,not only the influence of wheel rail movement on curve track,but also the lateral and vertical movement of railway crane should be simulated reasonably.The railway crane can be regarded as a multi-body system composed of various components.The system is very complex.It is necessary to define the rigid and flexible,restraint and force elements of underframe,leveling arc plate,bogie,wheel set,railway,suspension spring and other elements to determine the characteristics of each component and its connection mode.In this paper,after considering all the above factors,the curvilinear track model is established reasonably,the wheel rail longitudinal kinematics relationship is simulated,the dynamic analysis of the lateral and vertical dynamic response of the railway crane is carried out,and the relationship between the real-time observation value obtained by the sensor and the required piston extension is established.For the overall modeling method,the complex multi-body system is divided into a relatively simple single or two objects as a subsystem.In each subsystem,the connected basis coordinate system is established,and the connected basis of the above subsystem of each subsystem is taken as the reference coordinate system.Through this modeling method,a complex system is simplified into multiple subsystems and subsystems The relations between systems are established by constraint equations.According to the principle of virtual power,the important parameters of each subsystem are solved,and then the system dynamic equations are assembled.