Advanced Materials Research Vols. 915-916

Abstract: The theory of plates and shells is not adapted to design thickness for the multi-holes plates in engineering. A new method to quickly optimize the thickness based on the finite element method theory was put forward. The method combined the theory of plate with the finite element method to establish a mathematical model and analyzed the influences of load, constraint and complexity on design error. The practices demonstrated that the proposed design method is effective and feasible.

Abstract: This paper presented a study about maximum stresses acting on the 4-dish solar collector system, which caused by excessive wind. For this, Central Composite Design and Response Surface Method were used on the basis of maximum stresses calculated by Finite Element Method. VisualDOC was used for CCD (Central Composite Design) and RSM (Response Surface Method), and Ansys was used for FEM (Finite Element Method) analysis. 9 cases of CCD points were selected and FEM analyses were conducted at these points. Based on these results, response surface function was constructed to model maximum stresses as function of wind velocity and thickness of dish support bar. In order to evaluate RSM model, arbitrary point were selected, and maximum stresses calculated by RSM were compared with those calculated by FEM.

Abstract: The four key factors include gravity, roughness, bolt pressure and contact area as the input parameters of neural network, the GA-BP neural network was established for predicting the assembly deformation. And the experimental data is trained for this GA-BP neural network. Finally, the test data shows that BP neural network optimized by GA algorithm can achieve higher accuracy than BP neural network.

Abstract: To deal with the problem of energy waste in High-pressure gas relief of pulverized coal injection in the blast furnace, designed a flywheel compressor which consists of an energy storage mechanism and a power mechanism. It is used for recycling and reusing the energy released by the high-pressure nitrogen gas in pulverized coal mixing. It is a safe and an energy saving equipment without motor driving. In this paper, the model of the flywheel compressor was established in Solidworks and Fluent to simulate the flow field, then basic dimensions of the compressor was conducted, and structural design and optimization were completed at last.

Abstract: This paper introduces the role of axial flow fan with adjustable movable vane, aiming at complicated structure, difficult regulation and hydraulic device leakage of hydraulic movable vane regulation device, designs a new kind of movable vane regulation system-electronically controlled movable vane regulation system, describes the composition and working principle of electronically controlled movable vane regulation system, and emphasizes on structure features of control system, reducing mechanism and impeller assembly.

Abstract: There is a serious security problem in the process of workpieces flipping, which restricts the increase of production capacity in manufacturing process of large workpieces applied in nuclear power equipment. The shapes and characteristics of flipping workpieces were analyzed; the general model of workpieces outer contour was established. The design goals of heavy castings and forgings cold-work turnover mechanism were formulated based on the requirements of turning process, then the basic constraint-face was build and the geometric constraint-model was uniformed. A novelty 3- DOF planar serial mechanism of heavy upender was proposed whose overall configuration consists of three movements, that is roll, mobile, folding turn, which can realize the double function of turning 90 ° and 180 ° of large workpiece as hollow cylindrical, conical and spherical crown three types. On this basis, the airbags-drived flipping worktable was designed; Topological optimization of flipping worktable was further conducted. Its key technology will provide useful ideas and references for the development of large heavy duty positioner and turnover machine with its other related equipment.

Abstract: For hypoid gear which processed by HFT (hypoid gear formate tilt) method, geometry parameters and machining parameters of hypoid gear were calculated by using Gleason card. According to the actual machining process and meshing principle, tooth surface equation was derived by coordinate transformation. Then the discrete coordinates points of tooth surface were obtained by using MATLAB tools and projection transformation principle, and data were saved in ibl format. At last the 3-demensional model of hypoid gear were established by importing the ibl format data in Pro/e.

Abstract: Aimed at the layout of inner stiffeners in excavator's boom, this paper puts forward an optimization method for the layout of box structure 's inner stiffeners and layout topology optimizes based on Evolutionary Structural Optimization (ESO). Analyzed the boom with the finite element method under the bucket digging condition, the results show that the inner stiffeners obtained by this method can improve the stress concentration phenomenon and the high stress distribution areas. The practices demonstrated the proposed method is effective and feasible.

Abstract: Three dimensional models and finite element models of conductor clamps are built in software Solidworks and Abaqus. Different forces are loaded on finite element model of conductor clamps to obtain distributions of stress and displacement. Optimal design of conductor clamps is performed with finite element analysis and field test data. The results show that optimal design scheme achieves optimal target.

Abstract: This paper aimed at the machining error of the arc-teeth synchronous belts tooth ,the 3D model was established with CATIA ,the finite element model of belt was established by HYPERMESH ,and using the multibody dynamic software RECURDYN, the models with different machining errors were simulated by rigid-flexible coupling technology. Systematically studied the changing rule of the wedged stress and the contact stress under the influence of the machining error. So it has certain value to enhance the loading capacity, transmission performance and useful life.