L.Ya. Melkozerova (EKSTU), L.V.Kamenskikh (EKSTU)

THREE-DIMENSIONAL SIMULATION AS A NECESSARY SECTION IN TRAINING FUTURE ENGINEERS

Despite the fact that used during designing two-dimensional graphics systems allow to solve the problems facing the user quite successfully, the development of new technologies induces to the use of three-dimensional simulation in the training process.

Modern CAD system, including the one used in the training process, the system KOMPAS -3D has quite effective means of simulation, which allow to develop three-dimensional model of the most complicated parts and assemblage. Design of three-dimensional model of a part or assemblage is one of the stage of its making. The area of COMPAS-3D usage is determined by the major complex of tasks, solved by it. The tasks include:

· simulation of the parts with the aim of calculating their geometric and mass- centring characteristics;

· simulation of the parts for transferring geometry into calculation clusters;

· simulation of the parts for transferring geometry into clusters of developing controlling programs for the equipment with numerical program control;

· design of isometric views of the parts (for example, for making catalogs, illustrations for technical documentation).

After design of 3-D simulation of a part or assemblage, or just during the design, a designer can get its draft thus escaping the routine creation of the views by means of plain drawing. If using any CAD system, allowing to calculate and simulate the part of any complexity, the user has still to make drafts of the part manually or with the help of some graphics editor, we can hardly talk about complete automation of designing. We know that the more complicated the part the more complicated its view is. This means the harder and longer monitoring and changing, appearing, for example, during the testing the testing of experimental sample. In some cases it is not enough to change the structure, but it is necessary to change the details. At the same time besides editing the drafts one has to bring changes into specification. This, in turn, brings to the change of lines order in the specification and the numbers of positions in the assemblage draft. Thus, the change, made in one and the only document brings to the necessity of reviewing the whole documentation complex, and this notably decreases the effectiveness of time saving, got due to the calculations automation. `

This means that CAD system, allowing just simulate the part, and possibly, gets its draft does not correspond to the nowadays demand.

For the successful development and accompanying the documents we need the system that would help the developer follow corresponding of the assembling part to the drafts (assembling, working) and specifications.

The very opportunity is wholly presented by the modern version of COMPAS system. With its help the user can create the system of interconnected documents: three-dimension model, its drafts, and specifications.

The model of designed product is developed with the use of COMPAS-3D – editor of three-dimension solid-body models. The students were proposed to make three-dimension models of the parts being the parts of the assemblage and the three-dimension assemblage model itself (Fig.1).

With the help of draft-design editor COMPAS-GRAFIK associative views of the model were constructed. Such views constantly stay in contact with the models represented in them. Changing the forms, sizes and typology of the model we change the view in all connected with it views. Due to this the view always corresponds to the model interconnected with it. Assembling draft on developed model is presented on Fig.2.

The module of developing the specifications is now integrated with COMPAS-3D also (Fig. 3), interconnected with the assembling model as well as with the assembling draft.

The given technology of design has the following advantages before the traditional one:

· high quality of engineering study the elements, parts, structure components;

· definite reducing the amount of routine work on making drafts of the same type parts and structure components; concentrating attention on the essence of the project;

· perfect quality of graphic work;

· mastering the basis of principally new perspective technology of designing things, perfection working skills with PC and COMPAS-GRAFIK system.

Nowadays there is an urgent issue of intensification of training and research work supposing modernization of material and technical basis. And first of all, the computerization of the training processes and designing activity. Computerization is not that easy issue as it may seem to an inexperienced person.

In a technical higher educational institution practically any sub-department needs the SAD systems. They do not just change old drawing boards, but also allow to modernize various processes and interactions, notably decreasing the cycle as a rule extremely high-value experiments. Their use increases the effectiveness of designing work three to four times. At the present stage of research activity the introducing of SAD systems is mostly urgent.