Models and methods for analysis of temperature and thermomechanical fields in the bodies of complex shape in specialized intelligent system
The design of axisymmetric bodies of complex form, taking into account temperature and thermomechanical fields, is the object of research. To model these fields need to solve boundary value problems for differential equations with partial derivatives. Structural and regional structural methods are used to solve the boundary value problems of thermal conductivity and thermoelasticity. CAD, meeting modern requirements, should include systems based on knowledge. Also, improving the efficiency of CAD is achieved thanks to the development of methods of solution of thermal conductivity and thermoelasticity tasks in the bodies of complex form. Using created structures, we receive more stable and accurate solution of the problem of analysis of thermal and thermomechanical fields in the considered objects. The specialized intelligent system is created. It contains a database of knowledge: a database of geometric forms of designed objects and methods of solving of relevant problems; a database of rules which allow to automate the choice of method and structure of solutions, equations of boundary of its areas; other information, required to increase the degree of automation of computer modelling. Created system creates the program on RL language for some programming system (PS), which solves the problem. Created system is production system. The pictures of temperature and thermomechanical fields are studied with the help of created system in axisymmetric bodies of complex form - pistons of internal combustion engine (ICE), homogeneous and consisting of composite materials. The impact of insert material, form and location on the picture of the temperature and thermomechanical fields in these ICE pistons is researched. These researches help to design these objects in order to reduce the temperature in the critical points of the object. This improves the thermal regimes in these objects, increase their strength, reliability and durability.