Alyokhin V. Computer-Integrated Design of piston engine takes into account the effect of casting defects on the strength reliability

Processes of projection and technological preparation of manufacture of cast pistons DVS. A scientific justification and creation of technique of the computer-integrated projection of pistons DVS with complex application of engineering simulation for the analysis прочностной reliability taking into account foundry imperfections. In the course of the computer-integrated projection numerical and numerically-analytical methods are applied: a method of the ended differences in three-dimensional volume statement for simulation of thermal and hydrodynamic processes of moulding, a method of the ended elements for the analysis of thermomechanical loading of cast pistons DVS. Generalisation of experimental data and numerical results of calculation of influence of foundry imperfections on прочностные performances of pistons DVS was spent with use of a method of scheduling of experiment. For the first time the comprehensive approach to joint application of the computer-integrated systems of simulation of thermal, hydrodynamic parametres of process of moulding and calculation of the is intense-deformed condition of pistons taking into account influence of foundry imperfections on прочностную reliability of pistons DVS with forced ignition is offered. Numerical models of the is intense-deformed condition are offered at thermomechanical operation on the piston which differ from foundry imperfections existing by the account gas-shrink character. For the first time the method of definition of the sizes and locations of foundry imperfections in piston DVS with sharing of engineering simulation and experimental researches in manufacture is offered. Approaches to the computer-integrated projection which consider influence gas-shrink imperfections on прочностную reliability are created and offered for use at execution of scientific operations, manufacture preparation, projection of other cast details modern DVS. The designed technique of the computer-integrated projection gives the chance the account of influence of foundry imperfections on прочностную reliability of pistons DVS which considerably raises qualitative level of creation and manufacture of drives. Results of researches are introduced and used in Open Company "Ukrainian foundry company" (joint-stock company "HAS sent", Kharkov), КP "KhКBD" (Kharkov) and in the STALEMATE "AVTRAMAT" (Kharkov). Results of dissertational research are used in educational process on chairs of explosion engines and foundry manufacture NTU "KhPI". Engine-building.