Abstract. ThispaperresearchtheTopologyoptimizationbasedonlevelsetmethod.Existinglevel settopologyoptimizationmethodbasedonthereactiondiffusionequationdoesnotsatisfythe volumeconstraintsandconvergenceofobjectivefunctionwhensolvesomemodeloptimization. Accordingtothisphenomenon,thispaperproposesanewlevelsettopologyoptimizationalgorithm basedonthereactiondiffusionequation,thisalgorithmcancontrolthedirectionofthelevelset functionanddobidirectionaloptimizationwhichtheobjectivefunctionundertheconditionof volumeconstraintcanreducematerialorincreasethematerial.Eventually,theresultsofoptimization canbecomesteady.

A wet friction clutch friction discs is taken as the research object in this paper, the heat flux density and the convective heat transfer coefficient are calculated, and thermal distribution of the the friction discs and the separator discs are considered. An analysis about the transient heat generation and thermal-structural coupling analysis of friction discs during sliding processes are simulated using APDL (ANSYS parametric design language), the temperature field and stress field of friction discs are obtained, and regularities of distribution is studied spatially and historically. The results provide the basis for the design, optimization and application of friction discs.

Abstract. Diaphragm coupling with its simple structure, small size, high reliability, which can compensate for its input and output displacement deviation by its elastic deformation, is widely used in aerospace, marine, and chemical etc. This paper uses the ANSYS software and its APDL language to analysis the stress distribution when the diaphragm under the load of torque, axial deviation, centrifugal force, angular deviation and multiple loads. We find that the value of maximum stress usually appears in the outer or inner transition region and the axial deviation has a greater influence to the distribution of the stress. Based on above, we got three kinds of stiffness for axial, angular and torque, which the stiffness of diaphragm is nearly invariable. The results can be regard as an important reference for design and optimization of diaphragm coupling.

Abstract. This paper research the topological optimization based on level set method which based on the reaction diffusion equation. The paper propose a Level set topological optimization method which put the compliance as the objective function and take the volume as the main constraint, the element stress as the auxiliary constraint to regulate the volume constraint. This method not only can significantly speed up the optimization process, but can improve the precision of calculation and ensure the stability of the results when meet the stress constraint. Eventually, the proposed method can convenient the level set topological optimization to apply in engineering practice.