Papers by Keyword: Size Optimization

Abstract: The analysis model of ANSYS finite element for annular piezoelectric resonator is built in this paper, and experiments are carried out for verifying the validity of the finite element model. The influence of the piezoelectric resonator's sizes on the natural frequencies is discussed; and the optimization for the piezoelectric resonator's sizes by using ANSYS is carried out, in the optimization procedure, the piezoelectric ceramic volume is made minimal while its first order natural frequency is kept in a range. These researches provide a theoretical basis and effective way for piezoelectric resonator design and optimization.

Abstract: A size optimization is performed to a weight-balanced haptic device. Firstly design requirements for mechanical parts of haptic devices are summarized. After analyzing factors influencing force-reflecting accuracy, a basic idea is got that the device should be weight-balanced and should have minimum apparent mass while keeping certain stiffness. Then a simplified model is got for the prototype and apparent mass and stiffness is analyzed and expressed in terms of variables based on the simplified model. With link cross section set to be circular tubes, an optimization is done to find link diameters and wall thicknesses with lowest apparent mass and given stiffness. At last the optimization result is analyzed and the model is proved to be reasonable.

Abstract: To realize the lightweight structure, a car body frame conceptual design of a mini electric vehicle was performed with topology optimization and size optimization. Topology optimization was used to search load paths and size optimization was applied to model a simplified structure. Static stiffness, crash safety and free vibration conditions were considered simultaneously in both of the optimization phases. Due to the feature of conceptual design, crashworthiness cases were regarded as static stiffness ones with inertia relief analysis for a linear equivalent. The objective function in multi-objective topology optimization was defined by Compromise Programming Method in OptiStruct. Because of the characteristic of the geometry and the manufacturing constraints of profiles, the design variables in size optimization were defined as both continuous and discrete variables. The resultant structure outperforms the original one in many structure responses and most significantly, it reduces weight by 36%, which demonstrates the efficiency of the proposed method.

Abstract: PbSe quantum dots have a relavively narrow absorption spectrum and they can radiate quasi monochromatic light after absorbing sunlight. Also, the emission peak can be located in the range of the strongest spectral response of monocrystal silicon solar cell by adjusting particles sizes. In this paper we apply PbSe quantum dots into luminescent solar concentrator, analyse its physical process, establish mathematical model and optimize its size with C++. The simulation results show that its photoelectric conversion efficiency is size depended, when the length and width are 200cm and 150cm, respectively, its photoelectric transformation efficiency can reach 6.1%.

Abstract: This paper is intended to demonstrate the use of normalized radial basis function (NRBF) network and Bat Algorithm (BA) for size optimization of a mechanical part under static loading. The data needed for developing the NRBF model is generated simulating a parameterized CAD model in ANSYS Workbench 14.5. Plausible input data for the CAD model is created using Latin Hypercube Sampling (LHS) method. A torque arm is considered to proof the concept. The comparison between the result obtained from the proposed method and the solution from ANSYS Workbench itself shows that, the NRBF-BA model is indeed effective in providing a reasonable solution for a moderately complex problem.

Abstract: Frame is the most important carrying structure for tricycle vehicles. A reasonable frame design can increase its service life and reliability. Firstly, the frame structural modal frequency should avoid close proximity of excitation values. The structural modal characteristics were analyzed and validated; secondly, the method of size optimization was applied to improve the structure modal characteristics while taking into account the sensitivities analysis, at last, the thickness of steel plate was optimized to achieve lightweight and increase unreasonable natural frequency. According to the results of recomputation, the structure characteristics had been ameliorated obviously, and structures weight was reduced.

Abstract: The finite element software ANSYS is applied to optimize the front supporter of the concrete mixer truck. The main goal of the optimization is to reduce the quality. The statics analysis and the modal analysis of the front supporter are performed in the most dangerous work condition. The results of the two analyses are combined to explore improvement methods. Then, the topology optimization is performed to propose and establish the final shape and parameterization model. Finally, the multi-objective size optimization is performed to obtain the best optimization result. The maximum equivalent stress has reduced by 7.5%, and the quality has reduced by 13%.

Abstract: CAE analysis on engine hood is conducted under five common working conditions in this paper. Considering lightweight material application status at present, three material substitution plans are determined. To make full use of material properties, draw up size optimization scheme based on volume target and displacement and frequency constraints. Determine the optimum thickness by conducting size optimization on engine hood with optimization tool-Optistruct, so as to realize lightweight design.Based on the introduction of a evaluation method for lightweight scheme selection based on overall satisfaction and taking the factors of weight, cost and performance into consideration, at last, determine the best lightweight scheme.

Abstract: Structural optimization was important nowadays in getting the optimum design and usage of the material use, where size optimization is part of it. This research is focusing on the application of size optimization on steel wheel rim. Existing steel wheel rim dimension was measured and Finite Element Analysis (FEA) was done to get actual dimension and mechanical properties (stresses), as baseline data. CAD modelling on steel wheel rim was done using Pro-Engineer/Creo 1.0. One structural element was selected to be optimized. Then optimization program was generated using MAPLE to get optimum value (size). Steel wheel rim will be re-modelled with optimum size to get optimum design. FEA was done again on optimized steel wheel rim to compare with actual steel wheel rim data. Optimized steel wheel rim was showing better in mechanical stress with optimum size (minimize the weight and volume).

Abstract: Landslide Body, which is a combination part between Knife Tower and Saddle, plays a significant role in the working performance of the NC (numerical control) Lathe. So it is essential to optimize Landslide Body’s structure to improve static and dynamic characteristics. At first, the structure of NC Lathe is introduced. And then, static and dynamic analysis of Landslide Body is carried out before optimization. At the last, optimization process which consists of topology and size optimization is carried out. Based on the optimization results, a new structure of the Landslide Body is generated. It is proved that both static and dynamic characteristics are improved to some extent.