共查询到20条相似文献,搜索用时 31 毫秒
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液力变矩器计算机辅助设计与制造 总被引:5,自引:0,他引:5
本文简述了液力变矩器设计与制造的研究和发展,以及计算机在液力变矩器设计与制造行业的应用,指出了存在的问题;建立了液力变矩器计算机辅助设计与制造的一体化系统;实现了液力变矩器性能预估、叶形判断与叶栅系统入,出口参数计算的有机统一。 相似文献
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随着计算机与三维技术的迅速发展,水利工程的设计已经不仅局限于解决二维、单领域的技术问题,而是逐渐发展为三维、多专业集合的整体设计模式。现以Bentley系列软件为平台,通过创建模型、碰撞检测、工程量计算、实景效果等技术手段,提出一套适用于河道整治工程的三维设计方法。 相似文献
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随着桥梁技术的不断发展,拱桥的形式日新月异,使得设计工作难度大大增加.现以深汕大桥工程为案例,在深化设计阶段基于参数化、模板化设计思路应用达索3DE平台(2015X)建立包括主拱、主梁、吊杆、墩台基础、桥面附属工程等结构的一整套组合梁拱桥梁构件库,并完成了全线桥梁的BIM建模、基于BIM模型辅助设计校核、与结构计算分析... 相似文献
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This paper describes the development of an optimal design process for a steering column system and supporting system. A design
guide is proposed at the initial concept stage of the development process to obtain sufficient stiffness of the steering system
while reducing the idle vibration sensitivity of the system. Case studies on resonance isolation are summarized, where vibration
modes among the systems are separated by applying a vibration mode map at the initial stage of the design process. This study
also provides design guidelines for an optimal dynamic damper system using a CAE (computer aided engineering) analysis. The
damper FE (finite element) model is added to the vehicle model to analyze the relation between the frequency and the sensitivity
of the steering column system. This analysis methodology makes it possible to achieve target performance in the early design
stage and reduction of damper tuning activity after the proto car test stage. Through the proposed steering column system
development process, a lightweight vehicle with high stiffness is possible prior to the proto build stage. Furthermore, the
improved process is expected to contribute to reducing the overall development period and the number of proto car tests necessary
to achieve the desired steering system performance. 相似文献
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为解决公路隧道有限元分析对工程人员的有限元软件使用能力和专业力学理论要求高、建模过程繁琐、耗时较长等问题,通过对公路隧道力学模型和设计施工特点等进行分析研究,建立公路隧道数值建模的通用数据结构;以Python语言为二次开发和界面设计工具,基于PyQt5和Matplotlib图形模块,搭建公路隧道快速参数化建模平台;以ABAQUS为核心计算平台,利用其强大的二次开发能力,研制集成前、后处理和计算分析于一体的公路隧道自动建模与分析平台,并通过三心圆公路隧道算例对研制的参数化建模与自动分析平台的完整性、可用性和正确性进行测试。研究结果表明:
该快速参数化建模与自动分析平台极大地简化了公路隧道的有限元建模分析流程,降低了工程人员的建模难度和使用代价。 相似文献
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This paper presents the design optimization process of a short fiber-reinforced plastic armrest frame to minimize its weight
by replacing the steel frame with a plastic frame. The analysis was carried out with the equivalent mechanical model and design
of experiment (DOE) method. Instead of considering the whole structure, it is divided into three simpler regions to reduce
the complexity of the problem through examining its structural characteristics and load conditions. The maximum stress and
deflection of the regions that carry the normal load are calculated by the analytical mathematical form derived from an equivalent
model. The other regions loaded by contact stress are handled by FEM (finite element method), the DOE method, and the RSM
(response surface model). To optimize the design variables in both cases, the object functions derived from these calculations
are solved with a CAE (computer aided engineering) tool. This method clearly shows the mechanical and mathematical representation
of structural optimization and reduces the computing costs. After design optimization, the weight of the optimum plastic-based
armrest frame is reduced by about 18% compared to the initial design of a plastic frame and is decreased by 50% in comparison
with the steel frame. Some prototypical armrest frames were also made by injection molding and tested. The research results
fulfilled all of the design requirements. 相似文献
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重庆曾家岩嘉陵江大桥为(135+270+135)m刚性加劲悬索连续钢桁架公轨双用桥,上层为城市主干道路,下层为城市交通轨道,大桥路线走廊狭窄,桥址古今建筑密集、地下管网轨道交错繁杂、地形起伏显著。该桥设计中应用Bentley和Autodesk平台软件进行BIM技术协同设计,基于BIM平台软件,创建了三维地形模型和工程周边实景模型,在此基础上确定了最佳路线,通过桥型方案比选确定了连续钢桁架桥方案;建立钢桁架、桥墩等主要结构参数化模型,进行结构参数化设计;通过构件碰撞检测校核、桥墩防撞模拟、交通流模拟和工程量校核等,实现大桥优化设计。与传统二维设计相比,基于BIM技术优化该桥设计方案,大量节省了设计成本,有效地提高了桥梁设计质量,提升了整个工程管理水平。 相似文献
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运用经典系统工程工作分解(WBS)与组织机构分解(OBS)理论研究汽车开发的技术资源管理方法。通过车型平台化、系统模块化协同开发理念,引入平台化车型项目群组管理概念,研究同一车型平台或平台带宽上主导项目与衍生项目之间的开发关系。提出平台化车型开发管理中资源配置优化的措施。 相似文献
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High speed tensile test of steel sheets for the stress-strain curve at the intermediate strain rate 总被引:3,自引:0,他引:3
This paper presents stress-strain curves of steel sheets for an auto-body obtained at intermediate strain rates with a servo-hydraulic
type high speed tensile testing machine. The apparatus has the maximum stroke velocity of 7.8 m/sec to obtain the tensile
material properties at a strain rate of up to 500/sec. A special jig fixture is specially designed for accurate acquisition
of tensile loads with reduction of the load-ringing phenomenon induced by unstable stress wave propagation at high strain
rates. Tensile testing of steel sheets for an auto-body was carried out to obtain stress-strain curves of mild steel and advanced
high strength steels at strain rates ranged from 1/sec to 200/sec. The test results provide interesting information regarding
the stress-strain curves at intermediate strain rates ranged from 1/sec to 200/sec and demonstrate that strain rate hardening
is strongly coupled with strain hardening. 相似文献