Simulation And Lightweight Design Of Passenger Loading Steps For Vessels

With the rapid development of the waterway transportation, the passenger loading steps become the indispensable special-purpose vehicles in all the major ports. As the automotive lightweight is the development direction of modern automobile industry, it has great significances in saving fuel and reducing emission. This essay takes the GTK95 C passenger loading steps of Weihai Guangtai Airport Equipment Co. Ltd. as the main object of research. To reduce the passenger-vehicle curb mass, structure optimization and lightweight design are conduct on the vehicle-mounted scissor lift. By reducing the mass of scissor lift, the vehicle mass, fuel consumption and emission can be reduced, and costs can be saved.This essay takes the passenger loading steps as the main object of research, uses three-dimensional modeling software to build the three-dimensional solid model of scissor lift. This essay takes the passenger loading steps as the main object of research, uses three-dimensional modeling software to build the three-dimensional solid model of scissor lift. Import the three-dimensional solid model of scissor lift which is saved as the format of step into multi-body dynamics analysis software ADAMS, and do simulation analysis respectively of lifting condition and loading condition of the scissor lift to obtain the forces of every vice-bound. Build the parametric model of scissor lift in ADAMS, and conduct the multi-body dynamics analysis respectively of lifting condition and loading condition of the parametric model to obtain the forces of every vice-bound. By comparing the forces of the parametric model with the forces of three-dimensional solid model, it can be found that the errors between the forces of the two models are very small. So the three-dimensional solid model can be substituted by the parametric model, and the structure optimization analysis of the parametric model is true of the three-dimensional solid model.Conduct the structure optimization analysis of the scissor lift parametric model, which can be divided into two steps: the first step, the assumption that the mounted distance of the hydraulic cylinder is always appropriated is always met. Conduct structure optimization analysis of the arms of scissor lift to obtain the minimum constraint forces of scissor lift. Through the first step of optimization, the length of the scissor lift arms is shorted from 2550 mm to 2320 mm. The second step, conduct the optimization analysis of installation position of the hydraulic cylinder based on the first step of optimization to obtain the minimum constraint forces of scissor lift.Conduct the finite element analysis on the scissor lift after structure optimization with ANSYS. Conduct size optimization, which must meet the stiffness requirement, on the arms of scissor lift to achieve the lightweight design of scissor lift. Through the lightweight design, the total mass of the four scissor-lift arms is decreased.