共查询到20条相似文献,搜索用时 93 毫秒
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分析全景天窗外密封条摩擦异响的产生机理,粘-滑振动机理适用于解释密封条摩擦异响,调控摩擦系数和正压力是消除全景天窗外密封条摩擦异响的主要措施。为了抑制摩擦异响同时保证密封性,在全景天窗外密封条的设计中,建议密封条采用卡接式和粘接式组合的装配方式,密封条表面涂层的厚度为12~20 μm,密封条-聚氨酯包边接触区域密封条的压缩量为1.2~1.5 mm,密封条-密封条接触区域密封条的压缩量为1.6~2.0 mm。计算机辅助工程(CAE)分析可为全景天窗外密封条的设计优化提供帮助。 相似文献
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分析汽车车门密封条与钣金密封面之间的相对滑动、硬接触等造成的动态异响,结合非线性有限元分析软件Msc.Marc对密封条断面进行分析及实车异响排查验证,确定异响源于门洞密封条与车门摩擦或密封条本体撞击粘连,对密封条结构进行优化,彻底解决此类异响问题,并提高密封条的密封性。密封条结构优化后压缩载荷衰减率从7. 64%降到5. 82%,可为后续车型设计提供参考。 相似文献
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针对垃圾转运集装箱在转运过程中存在密封不严的情况,对密封条的结构参数进行了优化设计。运用Ansys有限元分析软件对密封条进行建模、网格划分以及建立边界条件,对不同截面形状的密封条进行应力与应变分析,对密封条的结构和尺寸进行优化。装载运行结果表明,优化的密封条的接触长度增大了44.3%,最大内应力和接触应力分别减小了46.0%和60.2%,耐久性能和密封性能提升,综合成本降低。 相似文献
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盛夏时节,随着用量日益扩增,彩色塑料门窗的热变形问题日渐突出。专家日前表示,给彩色塑料门窗设计排气孔,可很好地解决这一问题。 相似文献
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结合有限元分析软件MSC. MARC对某车型汽车尾门密封条进行结构分析与优化。通过对初步设计的电动尾门密封条结构进行压缩负荷有限元模拟分析,并优化调整截面结构,改变压缩负荷,使其满足设计要求。该方法可缩短研发周期,提高工作效率。 相似文献
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物料分级效率及分级精度是提升选粉机性能的关键因素.以SLK选粉机为研究对象,通过对单口、对口和四口入风配置的数值模拟总结了入口配置方案对送料筒内部流场特性的影响.在颗粒受力分析的基础上提出环形入风,以此优化了预处理系统的流场特性.结果 表明,入风口配置对送料筒内流速大小、流速分布以及湍流发展等影响较大.更多面的入口能够减少气流对冲、剪切及溢出等负面行为,从而获得稳定、高速、均匀的流场特性.颗粒在散料锥处的受力分析理论上说明了流场稳定性对颗粒均匀、稳定传输的重要作用,并阐明环形入风的潜在优势.此外,对散料锥处代表性水平线上的数据进行监测,从而评价环形入风配置的应用前景,为水泥、矿渣等相关工艺提供理论支撑及升级策略. 相似文献
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《分离科学与技术》2012,47(4):618-625
Effluent production of oily water type has generated many environmental problems for several industries. The use of flotation as a separation process of oily waters has been described, although it has been sometimes criticized due to the toxicity of collectors. The development and use of biodegradable surfactants may enhance the further acceptance of this separation technology. This work investigated the removal of the emulsified oil products in water by dissolved air flotation (DAF) with and without the use of a biosurfactant, in pilot scale. The biosurfactant added considerable value to the process, increasing from 80.0% to 98.0% the separation efficiency. 相似文献
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采用光面胎花纹雕刻,研究胎面花纹设计对轮胎噪声的影响,分别考察花纹沟类型、横向花纹沟的深度和宽度、花纹节距、胎肩花纹沟开放形式和胎肩花纹沟角度的影响。结果表明:轮胎花纹是轮胎噪声的主要来源,可以通过优化胎面花纹结构来降低轮胎噪声;选择合适的花纹类型,优化花纹块(沟)的设计和花纹节距的排列顺序,选择合适的胎肩花纹沟开放形式和花纹沟角度均可以实现轮胎降噪。 相似文献
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《国际聚合物材料杂志》2012,61(4):613-623
Abstract Paper summarizes the first results of two-dimensional (2D) numerically modelled expansion and flow of compressible and non-viscous gas in typical parts of air jet weaving system: in main nozzle designed as an ejector with various shapes of the mixing zone, in relay (auxiliary) nozzle with substantial flow separation in the rash flow bend directly before the nozzle outlet and the influence of the shape of the reed dent edges on the free stream reflection and penetration through reed gaps along a real “porous” wall. Used Euler's equations are solved by a Finite Volumes Method (FVM) with automatic mesh generation and optimization of unstructured triangle mesh. Graphical results show 2D isolines of all state values of the gas, further Mach number, entropy and velocity vectors. ID profiles of all quantities along choosen cross-section or surface can be obtained, too. They give to the designer a large and quick review about the problem. The coincidence with experiment, measuring and real weaving tests is very good. The advantage of the PC using consists in the very quick, simple and user-friendly operation. 相似文献