Abstract: In this subject, there were the Analysis Parametric Design Language (APDL) and optimization of the design process to be introduced. Based on APDL and optimization design module of ANSYS, the structure of suspension mechanism was optimized and the extraction of the maximum stress of the beam structure was realized according to the actual work of the large load temporarily installed suspended access equipment. The optimization of product structure was achieved and the utilization of materials was improved by the minimum structural quality of the suspension mechanism as the optimization objective. The study could provide reference for the similar products on design and development.
Abstract: This paper introduces the principle of applying the embedded development tool Visual LISP in three-dimensional parametric graphic design in AutoCAD environment. With the parametric design of 3D straight-toothed spur gear as example, an elaborate description of the process and method of 3D parametric graphic design based on Visual LISP is presented.
Abstract: Applying ADAMS to vibration control field of heavy truck. The vibration simulation model of a truck is established. With the simulation model, different acceleration responses under different suspension stiffness and damping force are simulated. The simulation result is close to the actual result. It shows that the simulation method is benefit to reduce the number of vibration experiment and to forecast the vibration response of heavy truck.
Abstract: Component variant design method based on parametric design technology and parametric CAE technology are discussed. Based on the integration of CAD and CAE, a variant design method with the function to satisfy engineering constraints is put forward. Using VC++ and Jscript as developing tools, CAD system (SolidWorks) and CAE system (ANSYS) are redeveloped and integrated. A variant design method based on the integration of CAD/CAE is realized. A prototype system of the above variant design method is developed. As an example, variant design of workbench of a machine tool is realized. The variant design method and the variant design prototype system are verified.
Abstract: After the automobile made an emergency brake or bumped by accident, the baby car seat will be deformed and cracked by great force, the baby car seat have became a very important topic for years. This study focuses on analyzing the state of baby car seat after receiving forces, propose the improvement of structure strength and safety factors, enhance the structural strength of baby car seat and improve collision resistance. The internal skeleton was a backbone of baby car seat structural design, this research utilized simulation that combined CAD software (Pro-E) with finite element analysis software (Ansys\Workbench) to analyze the bumping situation, the high-speed camera was also applied to record the bumping situation of baby car seat. The comparison between these two results was used to design the skeleton within safety seat in order to approach the anticipative structure strength. Therefore, structure analysis will enable baby car seat to reach a high level of collision resistance.
Abstract: When water is injected at an inlet of compressor, wet compression occurs due to evaporation of water droplets. In this work, the effects of wet compression on the performance of regenerative gas turbine cycle with turbine blade cooling are analytically investigated. For various pressure ratios and water injection ratios, the important system variables such as ratio of coolant flow for turbine blade cooling, fuel consumption, specific power and thermal efficiency are estimated. Parametric studies show that wet compression leads to significant enhancement in both specific power and thermal efficiency in gas turbine systems with turbine blade cooling.
Abstract: In mass manufacturing of optical fibers, the wet-on-wet polymer resin coating is an efficient process for applying double layer coatings on the glass fiber. This paper presents an analytic study on the behavior of non-Newtonian polymer resins in the double layer coating liquid flow inside a secondary coating die of the optical fiber coating applicator. Based the approximations of fully developed laminar flow and the power law model of non-Newtonian fluid, the coating liquid flow of two immiscible resin layers is modeled for the simplified geometry of capillary annulus, where the surface of glass fiber moves at high fiber drawing speed. The effects of important parameters such as non-Newtonian fluid properties, the coating die size, and fiber drawing speed are investigated on the resin velocity profiles and secondary coating layer thickness.
Abstract: This paper presents a spectral element model for the spinning uniform shaft represented by the Timoshenko beam model. The bearing-supports are represented by equivalent springs. The variational approach is used to formulate the spectral element model from the frequency-dependent shape functions derived from exact wave solutions to the governing differential equations.
Abstract: Because of cross roller-slewing bearing structure have a certain degree of particularity, and two sets of cross rollers is equivalent to two columns roller stack situation, therefore it should deduce roller calculation formula for two sets of roller respectively. According to the stress of the slewing bearings, we proceed load distribution calculation synthetically under the center of bearing axial force, overturning moment and radial force. Finally, based on the above formula for calculating the bearing load distribution and through the Matlab software, we analyze the influence of some parameters on the bearing load distribution. For ensuring bearing design parameter, it has the certain reference value.
Abstract: The weighted stochastic response surface method (WSRSM) has been demonstrated to be effective in improving the accuracy of the estimation of statistical moments and probability of failure (PoF) upon the stochastic response surface method (SRSM). However, it has been noticed that the weighting method in WSRSM may have little and sometimes negative impact on PoF estimation especially in the cases of low PoF. To address this issue, an enhanced weighting strategy is proposed that the weights of sample points are determined based on their importance not only to regression but also to PoF estimation. Specifically, relatively larger weights are assigned to points closer to the failure surface, which significantly accounts for the accuracy of PoF estimation. Comparative studies show that SRSM with the proposed weighting method outperforms WSRSM producing more accurate PoF estimation without incurring additional function evaluations.