紫微斗数断一生事业:有关客车的问题,如何翻译---高手进(可奖励)

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Passenger train automobile body 轻量化 involves to passenger train manufacture domain each aspect, how completed passenger train automobile body 轻量化 to become each factory attention the hot spot, the passenger train 轻量化 realization has manifested the passenger train factory technical level and the strength, passenger train automobile body 轻量化 took passenger train 轻量化 a part, had the pivotal significance.
The finite element method is uses in studying and analyzing the passenger train effectively one kind but the practical tool. The technical personnel uses the information which obtains from in the passenger train automobile body finite element model numerical analysis result to confirm the passenger train automobile body experiment or the improvement passenger train body design. Uses in the passenger train automobile body 轻量化 research in the passenger train design stage the finite element method, may reduce finalizes the laboratory to need the paper vehicle, and can reduce the product research and development cycle, causes the passenger train automobile body quality which designs to be light.

This article content mainly has following several aspects:

1, elaborated the passenger train automobile body 轻量化 selected topic background and the significance, passenger train 轻量化 might reduce the fuel oil consumption, reduce the passenger train whole the center of gravity, improved the passenger train initiative security highly, reduced the passenger train the rolling resistance, the acceleration resistance and the hill climbing resistance, but also could create the condition for the realization high efficiency. Passenger train 轻量化 while obtains the anticipated effect to improve the passenger train performance also to be able to bring a series of questions, the main question which passenger train 轻量化 must solve is the security and the cost. This article also described the passenger train 轻量化 main method and its the basic request, elaborated the passenger train automobile body 轻量化 status, the passenger train automobile body 轻量化 use tool and so on.

2, this article states passenger train automobile body 轻量化 uses the elementary theory for the limited unit deflection method, this method main step is: Takes the separate unit point displacement to take the basic unknown quantity -> unit analysis -> overall analysis -> solution, obtains the point displacement and other mechanical quantities. This article also narrated has exerted the elementary theory which the passenger train automobile body finite element model load needed, simply introduced MSC.The NASTRAN finite element analysis and around process the tool and MSC.NASTRAN analysis flow.

3, described the passenger train automobile body finite element modelling basic strategy, has carried on the engineering mechanics analysis to the passenger train automobile body, discussed the passenger train automobile body grid model and the material model establishment method. Has discussed the passenger train automobile body finite element model short-cut method: The engine, the gear box, the water tank and so on always become the short-cut method, passenger's short-cut method, differently connects the spot attachment point the short-cut method. Discussed the partial passenger trains cover finite element modelling method, described the load and the boundary condition common processing method and its the basic principle, and improved the traditional passenger train supporting system modelling method.

4, made the detailed analysis to the passenger train automobile body finite element model computed result to explain that, has produced the value analogue result examination basis, the analysis method, the passenger train finite element model improvement method as well as the passenger train automobile body intensity appraisal target, analyzed the passenger train automobile body to be curving, reverse, engine maximum torque operating mode and so on three kind of typical operating modes. Obtained the guest mechanically refined white sugar ka automobile body from in the finite element model computed result under the above typical operating mode in the passenger train automobile body while the gate in the angle, above the front axle behind the floor channel, the latter five human of your presence side floor skeleton and the suspension fork front and rear springs angle iso-stress relative big spot, and analyzed has had the stress big reason, and stress relative big spot clue which obtained according to the above operating mode under, carried on to the original design passenger train automobile body has always arranged optimizes, the topology optimizes, after before the improvement design passenger train automobile body stress simulation result and the improvement passenger train automobile body stress simulation result compared has the big improvement.

5, to has carried on the summary based on finite element passenger train automobile body 轻量化, pointed out passenger train automobile body 轻量化 is multi-level, the different stage 轻量化 consideration factor is different.

Qinglianghua involving passenger bus body manufacturing aspects of the field, how do the various bus body manufacturers Qinglianghua become the focus of attention, the bus Qinglianghua embodies bus manufacturers to achieve the skill level and strength, as a passenger bus body Qinglianghua Qinglianghua part of a decisive significance. France is limited billion for research and analysis buses an effective and practical tool. Limited use of technical personnel from the bus body, a model numerical analysis of the information obtained certification test or improve passenger bus body body design. Buses will be limited in the design phase for the bus body Qinglianghua yuan law studies may be required to reduce stereotyping test vehicles, and can shorten the product development cycle, designed to enable the bus body lesser quality. The contents are mainly in the following aspects : 1, a bus body on the selection of subjects Qinglianghua background and significance of buses Qinglianghua to reduce fuel consumption, reduce overall focus highly buses, improved bus safety initiative, reduced bus rolling resistance, resistance and climbing up resistance, but to create the conditions for achieving high. Bus Qinglianghua in obtaining the desired results of improving bus performance will bring a range of issues at the same time, buses Qinglianghua the main issue to be addressed is the security and cost. This article also describes the main bus Qinglianghua methods and the basic requirements set out in the bus body Qinglianghua status bus body Qinglianghua use tools. 2, the buses here in a body Qinglianghua limited to the basic theory modules displacement law, the method main steps are : get separated modules nodes displacement as a basic unknown quantity "analysis modules" overall analysis "combined to produce a node displacement and other mechanics volume. It also described the imposition of a limited bus body model payload for the basic theory, a brief description of the analysis and MSC.NASTRAN limited Yuan MSC.NASTRAN analysis and processing tools and processes. 3, describes the basic modelling bus body limited billion strategy for the bus body works mechanics analysis, and discussed with the bus body grid model material modelling methods. Yuan limited bus body explored ways to simplify the model : engines, transmissions, fuel tanks and other simplified methods to simplify passenger way to connect different parts of the Department to simplify connectivity. Some buses were discussed covered a limited modelling methods, and describes load conditions common border approach and its basic principles, and to improve the traditional system bus supports modelling methods. 4, limited to the bus body Yuan model calculations made detailed analysis shows that given the value of simulation results based on testing, analysis methods, limited Yuan bus models and methods to improve the bus body strength evaluation indicators, analyzed passenger body bending reverse, the engine torque largest state, the status of the three typical. Yuan models from the limited results of the calculations are buses white body in the typical Gongkuangxia bus body by the door, Sheung Kok, the former bridge side rear floor corridor, after five former Block adjacent floors of the structure and suspension and steel Kok, stress relatively larger parts, and analysis of a larger cause stress, and the stress on the basis of the above Gongkuangxia receive relatively larger part of the clues to the original design of the overall layout of bus body optimization, configuration optimization, improved design, the bus body stress simulation results and improve passenger body stress simulation before a big improvement compared to the results. 5, based on a limited review of the bus body Qinglianghua that bus body Qinglianghua is multilevel and different stages of Qinglianghua different considerations.