COMPARATIVE ANALYSIS OF THE DIAPHRAGM CLUTCH SPRING ELASTICITY CHARACTERISTICS OBTAINED AS A RESULT OF THE FINITE ELEMENT METHOD MODELING AND ANALYTICAL CALCULATION

The clutch is a linking element between the engine and transmission parts. The dynamics of engine loading and transmission and, accordingly, the loads which arise in their structural elements depend on the functioning of the clutch. Coupling with its diaphragm springs has become quite widespread on motor transport. There are various methods for calculating and simulating the operation of couplings with such springs. Nowadays, virtual stands based on the application of the software packages of dynamics of solid bodies with the introduction of flexible elements that allow to take into account the design features of vehicles and their aggregates using CAD and finite element models have become widespread. This method allows you to significantly reduce the number of full-scale tests, and, accordingly, the cost of the final product. Besides, the methods of dynamic solid modeling allow us to develop and verify the laws controlling the units and aggregates of vehicles. In order to make the virtual stand be similar to the actual model, it is necessary to create adequate models of parts, which will later be used in the dynamic solid model of such a stand. To verify the adequacy of finite element models at the design stage, it is advisable to make comparisons with analytical methods of calculation, since carrying out full-scale tests has rather a high labor input and cost. One of the most complex elements in the simulation of coupling is the diaphragm spring. One of the main specific indicators for comparison is its obtained elasticity characteristic, which significantly affects coupling. The paper compares two calculation methods of clutch spring - the analytical method and the method of finite element. The main difficulty in calculating the spring is its large displacement due to its thickness and the appearance of loss of stability during operation, which requires the use of special methods that allow to take into account the complex nature of the spring deformation. Comparative analysis showed that the results of the calculation for the above methods had a quantitative and qualitative convergence. Recommendations are given for solving problems of this kind.

clutch, diaphragm spring, finite element method, elasticity characteristic, vehicle, stress-strain state

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