FEA Of The Small Multi-function Chassis Frame And Its Lightweight Design

At present, CAE has been widely used in the modern structure design using the method FEA. FEA can shorten the development cycle, reduce the cost of the product development and also make the products more competitive while analyzing the existing products and optimization design. Chassis is one of the three composition of the vehicle from the point view of the composition of vehicle, which is the base of the power, economy, safety , reliability , performance and so on. In the view of vehicle's design and manufacture, to exert the their overall edge, it's necessary to choose the chassis and engine matching the body closely. Therefore , chassis plays an important role in the design of the vehicle. The main content of this paper is using finite element analysis method to lightweight the small multi-function chassis frame and structure optimization.The research object in this paper is the main components of high-speed rice transplanter (hydraulic transmission and CVT) which rely on imports and enterprises foreign-funded, so that the cost of transplanter is improved greatly,while these functions such as hydraulic transmission and CVT not only helpless for transplanting, but also improve the cost of chassis greatly. The development of chassis has become the"bottleneck"problems for the operating machinery in paddy field.This paper is focused on the frame of high-speed transplanter . the main research contents and the results as follows:1. Take the frame of high-speed transplaner as the research object and do some dynamics analysis. Analysis it's 3-D model while it is working in a normal and non-full loaded condition.2. In order to obtain the transplanters'power distribution in different conditions through conducting a torque experiment testing transplanter PTO, which conducted in domestic firstly. In this experiment, driving force ratio is about 1:3:5, torque ratio is about 1:4:8. At the same time , the power distribution in different conditions is got and the tested curve of different conditions in detail is analyzed during testing .3. Solve the problem that it's difficult to calibrate which dues to the particularity of the test object, state the principles and steps particularly. Introduce the selection of related experimental equipment and the concrete operation, providing reference for the related experiment in future.4. Set up the parameterized modeling with 3-D modeling software UG, accelerating the speed of the modeling and design efficiency, avoiding the repeat work in the modeling and optimization process.5. Choosing finite element analysis software ANSYS workbench to analysis the frame model. Using its interfaces with UG, the model will be saved in the form of .STP and then imported the ANSYS Workbench to analysis. Besides, the model can update the changes in 3-D model with FEA software.6. Do some static stress analysis of the frame transplanter in different conditions. Measuring the major part of the stress of the relatively large stress position based on the results of the static stress analysis. Then the calculated results will be compared with experimental data,Which verifying the correctness of simplified model, constraint processing and load simplified.7. A more reasonable design will be made by calculating the weight of the frame. Through a static stress analysis for the improved model ,the optimization program was proved economical and feasible .