The Research Of Mechanical-hydraulic Integration Virtual Prototyping

To satisfy the intense market competition and gain high efficiency, enterprises improve and renovate the design method of products constantly. Due to the advantage of the new technology "Virtual Prototyping", in order to improve the uncompleted aspects in the traditional design of excavator, the new technique is applied in the field of excavator design process. In this paper, the mechanical system of excavator is parameterized in ADAMS and the optimization of the working equipment is realized. Furthermore, the strength and stiffness of the working equipment is analyzed by ANSYS, by the method, we can quickly and relatively accurately get the stresses and the displacements of the structural parts, ensuring the reasonableness of structure design and the reliability of machine working performances. The following are the main contents of this paper.1. First of all, the basic theory frame of the Virtual Prototype is briefed, and the significance and development of hydraulic excavator in china and abroad are narrated, which demonstrates that it is necessary that the VP should be used in the development of the hydraulic excavator to achieve an efficient design.2. Under the instruction of Virtual Prototyping, we analyze the architecture of the excavator as well as its working process, especially discussing the kinematic analysis of working device. We can find the main technical data of excavator and the mathematical relationship among them; the algorithm of the multibody system dynamics, which is the center theory of ADAMS, is also introduced, which lay a solid foundation for the parametric drive and simulation.3. The composition of excavator is analyzed according to the theories of modeling and emulating, the mechanical model of excavator is parameterized in ADAMS, and the optimization of excavator is also achieved.4. By means of the powerful custom design of ADAMS, I create a user interface, which can accomplish the simulation process automatically and achieve the interaction between the user and the computer. Engineers can change parameters of the excavator to realize the diversification of the model and achieve the performance overall evaluation of the product.5. According to the theories of modeling and simulation, the modeling method of the excavator hydraulic system is mainly analyzed, and the hydraulic system is built by use of the hydraulic module of ADAMS. Furthermore, the mechanical andhydraulic systems are integrated via the twoway cylinder, which lay the foundation for mechanotronics.6. Because the working equipment of a hydraulic excavator, which is an important part, affects directly the working performances and reliability of the hydraulic excavator, According to two kinds of working condition under the max stress which is found through the dynamic simulation of ADAMS, the mechanics models of the boom and arm are established by Pro/E and calculated by the finite element method, We can get some important information about designing the key part by Analyzing the calculated solution of the finite element method.