Advanced Materials Research Vols. 945-949

Abstract: Chuck for rotor is prone to fracture when working under axial tensile force of pulsation cycle. The maximum stress position of the chuck calculated by finite element analysis coincides with the actual fracture location, which confirms that chuck slotted root is the weakest part of the rotor. The structure optimization of part is proposed based on the results of the original structural analysis. It is found that the maximum stress of the chunk of rotor reduced by 56.59% after optimization based on the calculation of the finite element analysis. The strength of the optimized slotted roots of the chuck rotor is improved greatly and the service life is extended, which solved a technical problem for the enterprise.

Abstract: Aimed to the comfort demand of people for the high-end bicycle saddle, a parametric design method of customized saddle is presented based on the Cubic B-spline theory. According to the relationship between Cubic B-spline control points and the saddle shape, the outer contour control points is determined firstly, then all control point positions on the saddle surface are calculated by these outer contour control points, and the parameterized model of the customized saddle is built and its overall surface is designed. On this basis, a more reasonable saddle surface is obtained by adjusting the control points. Finite element analysis (FEA) is carried out on customized saddle and common bicycle saddle respectively. Their stress distributions comparison result shows that customized saddle can minimize pressure to the anterior perineum and ischial tuberosity effectively. These verify that the saddle customized design method is feasible.

Abstract: Three finite element models of bus with difference types of cant rail joint were developed and the rollover crashworthiness of buses was simulated by LS_DYNA according to ECE R66. The calculation technique was validated by the tests of three separate specimens, which were extracted from the bus superstructure. The velocity of bus just before impact for rollover, were calculated using ADAMS software and then used as initial condition for the LS_DYNA analysis. No intrusion was found in the residual space of three bus models during rollover test simulation. The energy absorbing capacity and distortion configuration were investigated. The simulation results shown that the cont rail joint structure played an important part in energy absorbing during bus rollover accident, and would contribute to some design guidelines for bus rollover crashworthiness.

Abstract: The worm auger contributes to the pressures generated at the grinder plate face during grinding of meat. The axial pressure distribution along the worm auger during grinding was discussed. The pressure almost increased linearly along axial direction from feeding end to discharge end. The 3D model of the worm auger created in Pro/E software were imported into ANSYS 9.0 software and a linear static finite element analysis was performed. The visual deflection patterns the part experiences under "real world" loading conditions were obtained so as to complete the security check of strength. The results showed that the yield strength was largely improved with thread root radius increasing from 2 mm to 5 mm. Hence, this method can be applied to rapidly and correctly find those dangerous positions and existing imperfections of its structure, thus providing valuable data to judge its structural rationality before practical manufacture, so as to make further improvements and optimizations for its structural design.

Abstract: Numerical control (NC, for short) forming machine is kind of digital forming equipment, which is based on the development of manufacturing technology without pattern, and can get mold by processing module directly, and its mechanical structure is mainly composed of the main structure, moving system, tool system and other components. The main structure is not only the foundation and framework of the entire machine, but also the most important component bearing pressure. The moving system is the most critical part of forming machine to achieve its fundamental function. Therefore, the design and development of the main structure and moving system have directly impact on the performance and service life of the forming machine, which is an important factor to reflect the level of the overall design. In this paper, structural static analysis of the main structure and moving system was made through finite element numerical simulation, the more reasonable scheme was optimized, by which the safety and reliability of forming machine was ensured. The research results can provide the necessary technical support for the structural design of NC forming machine.

Abstract: In this paper, numerical simulation technology was applied to comprehensively analyze and study the mechanical properties of the derrick. The three-dimensional finite elements analysis model of the derrick structure was established, which provided the physical model of the numerical simulation and the optimization of the three-dimensional derrick. The finite element simulation method was applied to analyze and optimize the mechanical and deformation of the three-dimensional derrick structure, so that the theoretical method to study and design the three-dimensional derrick using finite element method was established.

Abstract: Dry-type transformer is a high electric strength, high mechanical strength and high heat intensity transformer. With the acceleration of our city and countryside grid construction and the energy saving requirement in power industry, the application of dry-type transformer is expanding. Also, society proposes a higher standard in dry-type transformer. To improve its working capacity and reduce power loss further, we need to analyses its inner working conditions. This thesis uses finite element software ANSYS to build a model of dry-type transformer and gets its power loss and temperature distribution under different working capacity. After comparing this simulation results with experimental results, the accuracy of simulation method is proved. This simulation provides a structure optimization method of dry-type transformer. It can reduce design cycle and cost, help to spread the application of dry-type transformer.

Abstract: Magnetic controllable reactor (MCR) has many advantages in reactive power compensation in high voltage system, but the power loss and temperature rise problems limit its working capacity and impact its advantages. To improve its performance, a more accurate quantitative analysis about the condition of power loss and temperature rise in MCR is needed. This article uses ANSYS software to build a 3-dimensional simulation model about a dry-type MCR. The model analyses its magnetic field distribution, power loss and temperature rise. The silulation results is proved by experiment. This research provides an effective method and a theoretical basis to design the new structure of MCR and considerably reduces the design cycle and the cost.

Abstract: Q43Y-85D type crocodile hydraulic clipping machine was taken as research object to optimization design. A finite element model for clipping machine was built using shell unit as fundamental unit. ANSYS12.0 finite element method was used to analyze the deformation and stress distribution of the shear platform model of hydraulic clipping machine. The result showed that the maximum equivalent stress at the dangerous area was 368.162 MPa and the maximum elastic strain was 0.1814×10^-2 mm. After the structural optimization design, it was found that the maximum equivalent stress decreased to 186.238 MPa which did not exceed the material’s yield limitation 215 MPa and the maximum elastic strain decreased to 0.919×10^-3 mm which satisfied the requirement of stiffness.

Abstract: Due to the growing demand for fitness ball in current domestic market, and the demand for different size ball is also on the rise. In this paper, a kind of fitness testing institution has been proposed in this paper. The preliminary design and modeling of the agency were conducted in the Solidworks. In order to validate the correctness of the model design, the motion simulation was proceed by the Adamas. From the data obtained by the simulation, we can know the functions of the machine, which can provide data support for the subsequent design.