Study On Management And Supporting Technology In Railway Locomotives And Vehicles Virtual Prototype

RVVP (Railway Vehicle Virtual Prototyping) is VP technology's specific application in the design and manufacture of railway vehicle, as well as a integrated simulation system comprehensively supporting the development and design of high speed DMUs, over loading wagons and high speed locomotives. Under integrated environment, designers can complete scheme argumentation and optimum design efficiently by using the integrated modeling simulation tools and its related design and simulation database.This paper presents the structure of RVVP composed by design, simulation, testing, management and supporting systems from the performance simulation which is the core of VP technology. At the same time the relationship of simulation between management and supporting system is emphasized.In this paper the author indicates the core technique of VP is performance simulation (CAE). Concerning its simulation management and supporting technique, this discourse carries out a series of study: techniques that dealing with collaborative simulation integration, data reconciliation, performance simulation management, the safe sharing mode of information in the extensive area network, the reasonable development module of CAE resource by network multi-user. Therefore this paper focuses on aspects as follows:1. The feature of performance simulation of RVVP is analyzed. This paper puts forward the theory model of simulation supporting system which is independent from the design one for solving problems in the correspondence and cooperation of performance simulation; the technique of data reconciliation and delamination strategy for solving the problem of model data interface existing in the simulation cell. In order to accomplish the theory model, the inter-manipulations among the simulation cells are solved by the way of adopting CORBA.2. This paper conducts an analysis of development process of railway vehicle products and advances the concept of introducing PDM as management tool under the process of RVVP's performance simulation. And the group management of integrated simulation based on the PDM, application encapsulation and data integration, management of repository are researched. Finally, taken the process of modeling, loading and analyzing of K2 bogie frame as example, the validity of PDM as RVVP's management tool is proved.3. The demand of VP collaborative design to network and the merits and faults of network model based on the Local Area Network, Extensive Area Network and Internet are analyzed. According to the merits of above network model, network supporting technique of VP based on VPN is put forward. As well as this paper analyzes technique detail of IPSec VPN related to system structure, relative agreement and puts forward the enterprise's implement mode of VPN and related products. Finally, taken the China North Railway Group (CNR) as example, the author presents the cooperation design method based on VPN among the technical centers attributed to CNR.4. Using CNR as application object, further research of the practice of long-distance CAE service is made based on ASP mode. This paper presents the feasibility and necessity of mode developing long-distance CAE service and gives, structural framing of CAE service platform based on ASP mode. Special attention is paid to the constitution and function of every structure, as well as the management system composition of this service platform and the accomplishment of system database and main module. Further research of the design of BBS simulation help system supporting long-distance CAE service and the selection and design of Video Conference System are conducted.On the basis of fatigue life prediction for rail wangon, the validity of remote CAE service by ASP mode is proved.The innovations of this paper are given as follows:1. For the solution of modulation of model data existing in the simulation cell, the theory model of simulation system relatively independent from the design one as well as the technique of simulation data reconciliation are put forward. By the way of the three layer frame based on CORBA, simulation system of VP is designed to settle the problem of inter-manipulation among the different simulation cell.2. This paper puts forward the concept of introducing PDM as management tool during the performance simulation of VPRV. Research is conducted about the group management of integrated simulation based on the PDM, application encapsulation and data integration, management of repository. Taken the process of modeling, loading and analyzing of K2 bogie frame as example, the validity of PDM as RVVP's management tool is proved.3. In this paper the author puts forward the collaborative design model of VPRV based on VPN, which offers remarkable advantage of the safety and economy. Using CNR as application object, collaborative design connection based on VPN is accomplished among the technical centers attributed to CNR.4. The mode and structure composition of remote CAE service by ASP mode is put forward so as to accomplish the design of CAE service platform management system and Video Conference System. On the basis of fatigue life prediction for rail wangon, the validity of remote CAE service by ASP mode is proved.