共查询到19条相似文献，搜索用时 125 毫秒
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研究了多学科设计优化技术,在Pro/E、Ansys和iSIGHT软件集成环境下,对轴承座进行多学科设计优化,并对优化前和多学科设计优化的环境下得到的优化结果进行了比较,得出了多学科设计优化能够有效地实现优化目标. 相似文献
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提出了在计算机辅助夹具设计中自动校验夹紧稳定性的方法.当用CAD软件系统设计组合夹具时,通过对夹紧力和定位支承反作用力之间的平衡作出评估,即可判定系统的定位可靠性. 相似文献
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基于ADAMS虚拟样机仿真软件平台,对拟设计的一种钢厂用杠杆夹紧器进行了建模仿真及运动学和动力学分析,得到了杠杆夹紧器工作下的运动曲线及夹紧力曲线,并比较了有阻尼和无阻尼情况下的夹紧力及连杆的速度、加速度,为夹紧器的进一步优化设计提供了参考。 相似文献
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董海东 《重庆职业技术学院学报》2007,16(1):146-147
通过应用圆偏心夹紧机构夹紧力计算公式,提出按圆偏心自锁程度不同的分类方式及其相应的夹紧力计算方法,突出了圆偏心轮在该夹紧机构中的重要性;进一步讨论圆偏心轮的偏心距的确定,并提出了其设计程序,为正确设计和应用该机构提供了可靠的理论依据. 相似文献
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对一特殊扇形陶瓷件的传动定位方式及夹具进行研究,设计蜗杆传动和圆弧导轨传动相结合的传动定位平台与活动扒爪的夹紧机构,通过对活动扒爪机构的受力分析,计算得到其运动的临界压力角,不仅使刀具在铣削过程中与装夹机构不发生干涉,而且为加工扇形陶瓷件提供所需夹紧力。从而简化运动定位方式,降低成本,提高陶瓷件的加工精度等。对后期具体设计制作具有很强的工程实用价值。 相似文献
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对多学科远程教学平台的研究和开发进行了介绍,在结合教学实践的基础上,利用COM技术等设计并实现了一个基于Web的多学科远程教学平台,该平台不仅能提供一个全开放的、智能化、多学科交叉的远程教学环境,而且能为各科任课教师开发网络课程、实施网上教学提供简易的、全面的工具支持,从而提高网络课程的连贯性、开放性和教学资源的可重用性。 相似文献
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文章介绍了优化高中化学实验课堂教学的主要策略,包括:充分利用化学实验现象优势,提高学生对实践环节的兴趣;注重优化典型实验的演示过程,提高演示实验的示范作用;促进多学科相互融合,为化学实验开展营造更为广阔的平台;利用多元化的课堂设计思路,形成浓厚的实验学习氛围。 相似文献
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利用多学科设计优化（MDO）对教学系统进行总体设计,是对传统教学设计的一大拓展。传统教学设计不能很好地实现各个学科之间的协同效应,所取得的最终设计结果往往不是系统的全局最优解。基于MDO的教学设计能在很大程度上克服传统教学设计的弊端,实现教学设计的整体效益最大化。 相似文献
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现实中环境因素对螺旋桨性能影响很大.应用了iSIGHT多学科优化平台的质量工程方法对螺旋桨性能进行优化设计.结果表明,该方法使螺旋桨效率和最小压力系数的鲁棒性都有提高,降低了环境变化对性能的影响. 相似文献
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在研究复杂产品系统规划分解、整体优化的基础上,提出了MDO中学科的数学描述方法;根据学科优化模型和系统整体优化模型,结合库恩—塔克极值理论,提出并证明了MDO中学科最优解直接组合成为系统整体最优解的3个条件,丰富了复杂产品系统的优化理论,分析了现实中系统整体最优解很难由学科最优解直接组合而得到的原因,得到了整体优化与学科优化的辩证关系,有助于寻找复杂产品系统的整体优解。 相似文献
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An approach for shape optimization of stratosphere airships based on multidisciplinary design optimization 总被引：1，自引：0，他引：1
Airship shape is crucial to the design of stratosphere airships. In this paper, multidisciplinary design optimization （MDO） technology is introduced into the design of airship shape. We devise a composite objective function, based on this technology, which takes account of various factors which influence airship performance, including aerodynamics, structures, energy and weight to determine the optimal airship shape. A shape generation algorithm is proposed and appropriate mathematical models are constructed. Simulation results show that the optimized shape gives an improvement in the value of the composite objective function compared with a reference shape. 相似文献
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To improve the aerodynamic performance of high-speed trains (HSTs) running in the open air, a multi-objective aerodynamic optimization design method for the head shape of a HST is proposed in this paper. A parametric model of the HST was established and seven design variables of the head shape were extracted. Sample points and their exact values of optimization objectives were obtained by an optimal Latin hypercube sampling (opt. LHS) plan and computational fluid dynamic (CFD) simulations, respectively. A Kriging surrogate model was constructed based on the sample points and their optimization objectives. Taking the total aerodynamic drag force and the aerodynamic lift force of the tail coach as the optimization objectives, the multi-objective aerodynamic optimization design was performed based on a non-dominated sorting genetic algorithm-II (NSGA-II) and the Kriging model. After optimization, a series of Pareto-optimal head shapes were obtained. An optimal head shape was selected from the Pareto-optimal head shapes, and the aerodynamic performance of the HST with the optimal head shape was compared with that of the original train in conditions with and without crosswinds. Compared with the original train, the total aerodynamic drag force is reduced by 2.61% and the lift force of the tail coach is reduced by 9.90% in conditions without crosswind. Moreover, the optimal train benefits from lower fluctuations in aerodynamic loads in crosswind conditions. 相似文献
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针对金属标准拉伸试验中,上下夹具偏心所导致的试验初期变形曲线往负方向延伸的"反走"现象,建立了一套考虑夹具偏心及夹持偏角的试样受力理论模型.特别对常用的楔形夹具在试验过程中产生的零夹持角和非零夹持角情况进行了分析,推导出试样应变与夹持力间的关系.分析了试验中产生变形值"反走"现象的机理,通过ABAQUS有限元软件对引伸计-试样联合模型进行了数值仿真.结果表明,理论分析、实验实测,以及有限元数值模拟所得结果具有良好的一致性.得出:试验初期在偏心所产生的误差占主导地位的并不是通常认为的偏心弯矩,而是上下楔形夹具夹持方式产生的侧向力以及附加弯矩的联合作用,解释并模拟了变形的"反走"现象,为进一步提高变形测量精度提供了新的思路. 相似文献
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The aim of this study is to explore the potential of various plant ramifications as concept generators for creating a brand topology optimization solution for stiffness design of continuum structures under harmonic force excitations. Firstly, a mathematical model is built to identify analytical laws that underlie the optimality of the effective but individual design rules of existing leaf venation morphogenesis. Then, a new evolutionary algorithm is developed to find the optimal topology of stiffened structures under harmonic force excitations. Candidate stiffeners are treated as being alive, growing at locations with a maximum displacement response gradient along the structural surface. Since the scale of the candidate stiffeners can be adaptively expanded or reduced during the simulation, computational resources could be saved, thereby enhancing the flexibility of topology optimization. Finally, the suggested approach is applied to a case study in which the displacement amplitude at specified locations is defined as the objective and the volume of added stiffeners as the constraint. The simulation process shows how the stiffness design of continuum structures can be conducted automatically using this bionic approach. 相似文献
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