共查询到18条相似文献,搜索用时 187 毫秒
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以塔式起重机变幅机构中蜗轮齿冠体积最小为优化目标,建立了模糊优化设计的数学模型。由于传统的优化方法存在着求解过程复杂和寻优过程容易陷入局部最优解的问题,故应用MATLAB遗传算法工具箱寻求问题最优解,使求解过程得到简化,能可靠地获得全局最优解。 相似文献
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以蜗轮齿冠体积最小、传动效率最高和中心距最小为目标,在保证蜗轮和蜗杆满足承载、强度及其它要求的前提下建立蜗杆传动多目标优化设计的数学模型,并运用实数编码策略、联赛选择机制及通过动态调整交叉概率和变异概率,引入自适应算子对标准遗传算法进行改进,利用改进后的遗传算法对该问题进行了优化设计.整个求解过程和结果表明,该方法具有较好的实用价值,是一种值得推荐的设计方法. 相似文献
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刘文清 《机械工程与自动化》2001,(1):16-17
考虑可靠性等约束条件,以螺旋弹簧重量最轻、刚度误差最小为优化设计目标,建立多目标优化设计数学模型,用理想点法对模型进行求解,得到满足所有约束条件的最优解.该方法有效而实用,对求解同类零件优化设计问题具有普遍意义. 相似文献
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以鼓式制动器效能因素最大和制动鼓体积最小为目标,对鼓式制动器进行多目标优化设计,利用iSIGHT集成的多目标优化遗传算法,得到多目标优化问题的Pareto最优解集,再利用Pareto最优解集专用后处理工具EDM,找到最合适的折衷解. 相似文献
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螺旋弹簧可靠性多目标优化设计 总被引:1,自引:0,他引:1
考考虑可靠性等约束条件,以螺旋弹簧重量最轻、刚度误差最小为优化为设计目标,建立多目标优化设计数学模型,用理想点法对模型进行求解,得到满足所有约束条件的最优解,该方法有效而实用,对求解同类零件优化设计问题具有普遍意义。 相似文献
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为了研究关键设计参数对平面包络内啮合蜗杆传动接触性能及承载能力的影响。基于齿轮啮合原理,构建平面包络内啮合蜗杆传动的空间齿面接触线方程,利用数值计算方法求得空间齿面接触线,并将其映射到蜗轮齿面,通过分析中心距、传动比、母平面倾角、蜗轮回转轴倾角、蜗轮转角、蜗杆分度圆系数、主基圆系数等不同参数对蜗杆齿面接触区域的分布情况,找出合理的设计参数范围,此外,根据初步分析结果,选取一组较为合理参数生成了平面包络内啮合蜗杆传动的三维模型。研究表明,传动比、母平面倾角、蜗轮转角对平面包络内啮合蜗杆传动的接触区域有较大影响,母平面倾角在18°~36°、蜗轮回转中心轴倾角在30°~54°、蜗轮转角在90°~138°之间取值时,平面包络内啮合蜗杆传动的具有较好的接触区域。研究结果为平面包络内啮合蜗杆传动的后续研究奠定了理论基础。 相似文献
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Load sharing and stress analysis of single enveloping worm gearing considering transmission errors 总被引:1,自引:1,他引:0
A. H. Falah A. H. Elkholy 《The International Journal of Advanced Manufacturing Technology》2008,37(3-4):211-220
A procedure, known as the slicing method, which has been developed earlier by the authors to estimate the load share of single
enveloping (cylindrical) worm gear drives and to calculate the instantaneous tooth meshing stiffness and stresses, is extended
in this study to investigate the effect of transmission error on loading and stresses. Tooth composite deflection caused by
bending, shearing, contact deformation and initial separation due to profile mismatch are determined in the analysis as well
as tooth stiffness variation during the course of contact of both the worm and the wheel. The elasticity theory was used to
calculate fillet stresses and deformation of both the worm and wheel. Numerical examples are presented to illustrate the response
of worm gear set in the presence of transmission error and under given loading conditions. The procedure was proven to be
safe and reliable in rating the load capacity and useful in the design of worm gear drives with compact size and high power
transmission. 相似文献
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Application of the Genetic Algorithm to the Multi-Objective Optimization of Air Bearings 总被引:1,自引:0,他引:1
A feasible solution must be obtained in a reasonable time with high probability of global optimum for a complex tribological design problem. To meet this decisive requirement in a multi-objective optimization problem, the popular and powerful genetic algorithms (GAs) are adopted in an illustrated air bearing design. In this study, the goal of multi-objective optimization is achieved by incorporating the criterion of Pareto optimality in the selection of mating groups in the GAs. In the illustrated example the diversity of group members in the evolution process is much better maintained by using Pareto ranking method than that with the roulette wheel selection scheme. The final selection of the optimal point of the points satisfied the Pareto optimality is based on the minimum–maximum objective deviation criterion. It is shown that the application of the GA with the Pareto ranking is especially useful in dealing with multi-objective optimizations. A hybrid selection scheme combining the Pareto ranking and roulette wheel selections is also presented to deal with a problem with a combined single objective. With the early generations running the Pareto ranking criterion, the resultant divergence preserved in the population benefits the overall GA's performance. The presented procedure is readily adoptable for parallel computing, which deserves further study in tribological designs to improve the computational efficiency. 相似文献
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