共查询到18条相似文献,搜索用时 125 毫秒
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应用Ansys5.7软件建立了地铁防护密闭隔断门的结构模型,并对其进行有限元分析,通过门扇的应力分析及各点位移的结果确定门扇的结构。解决了该产品中直接受力件的结构和强度问题。 相似文献
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地铁是城市建设的重要组成部分,同时也是城市人民防空工程体系的重要连接线,平时担负旅客运输任务,战时担负人员紧急掩蔽任务。本文研究的设备是使用在地铁隧道中,战时关闭的一种防护密闭隔断门,其功能是平时不影响车辆运行,战时在不破坏轨道和供电的条件下能够防御核爆炸和常规武器爆炸的冲击以及生化武器打击。该设备是一种大小双扇门的结构,关闭后密封效果可靠,开启后不影响行车安全。此次方案设计的重点是该门的关键受力构件,即闭锁和铰页,这两部分构件的设计直接影响到隔断门的安全性和稳定性,对设备的使用意义重大。 相似文献
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门扇是防淹门最重要的部件之一。应用ANSYS7.1软件建立了地铁防淹门门扇的结构模型,并对其进行有限元分析,通过门扇的应力分析及变形分析来确定门扇的结构。提高门扇结构强度的安全性和制造的经济性。 相似文献
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分析了防淹门在广州地铁2号、3号、4号线的使用现状和门体的运行特点以及钢丝绳、齿轮等机械部件的维护要点,对广州地铁未来防淹门的发展做了探讨,提出了在新线建设中需要考虑安全可靠、备用操作、方便维护等要点。 相似文献
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本文对地铁防淹门系统进行了基本可靠性预计,依据可靠性框图估计已建成系统各个组成单元在整个寿命过程中,因单元不可靠所导致的系统失效率,由此确定系统的无故障工作时间,可对防淹门系统的维护保养提供有价值的指导,同时也可对新型防淹门设计提供改进依据。 相似文献
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针对国内城市轨道交通地铁车辆上是否应依据欧盟EN45545防火标准设置防火隔断门问题,结合广州地铁十八号线地铁车辆上设置的防火隔断门的应用案例,从城市轨道交通车辆防火隔断门结构设计及工作原理、设置防火隔断门的优缺点、防火隔断门运用可靠性、防火隔断门设置依据、不设置防火隔断门原因等方面进行分析,认为在城市轨道交通地铁车辆上,防火隔断门的应用能够隔离火灾险情,但同时增加车辆能耗、车辆维护检修工作量及车辆整体故障率,国内城市轨道交通新建线路地铁车辆不需要照搬欧盟EN45545防火标准,应结合本国国情及当地城市轨道交通行业标准规范要求和当地地铁运营实际客运量情况来综合考虑是否设置防火隔断门。可为我国城市轨道交通新建线路地铁车辆时论证设置防火隔断门提供参考。 相似文献
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为了研究新型上卧式工作闸门水弹性振动问题,考查水闸在引(排)水不同运行工况下作用于闸门结构的水动力荷载,取得了脉动压力量级及谱特征,并获得了该类闸门的最大脉动压力系数,为同类闸门动荷载设计取值提供了参考依据。此外,分析了闸门结构的静动力特性,论证了闸门启闭杆的动力稳定性。通过水弹性振动模型取得闸门流激振动响应特征,揭示了闸门振动的性质、量级及其危害,提出了控制闸门振动、确保闸门安全运行的措施和方法。 相似文献
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Flow measurement and control in open channel system for lateral flow is important to support the system management. The flow characteristics of combined side weir-gate are complicated due to changes in flow conditions along the side weir-gate section. Experimental investigation of the flow characteristics of both weir and sluice gates is crucial for predicting the flow through a combined side weir-gate structure. Although weir-gate structures are widely used for frontal flow in hydraulic structures, the same is not true for lateral flows. In this study, 650 laboratory tests were conducted to determine the flow characteristics of combined side weir-gate for subcritical flow, and the experimental results were analyzed to determine the effect of these characteristics and weir-gate geometry on discharge capacity. Interaction factor of combined side weir-gate is a function of the upstream Froude number, the ratio of gate opening to upstream flow depth, the ratio of distance between the top of the sluice gate and the weir crest to gate opening, the ratio of weir and gate length to upstream flow depth, and the ratio of weir and gate length to main channel width. Consequently, more discharge is passed through combined side weir-gate compared to side weir and sluice gates. The empirically derived equations for the discharge of combined side weir-gate show good compatibility with the experimental data. 相似文献
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Sluice/slide gates are widely used for flow depth control and flow discharge measurements in open channels. The hydraulic behavior of the sluice gates located in the rectangular open channels is well documented in the literature. This study reports the results of an investigation conducted to establish the stage-discharge relationship for the sluice gates located in horizontal, circular open channels/pipes under free outflow conditions. Different stage-discharge models were proposed based on the Buckingham's theorem of dimensional analysis and orifice theory. A comprehensive series of laboratory experiments (729 runs) were performed to study the sluice gates located at the middle, and at the end of two circular pipes. Using the data collected from two circular open channels of nominal diameters 20 and 30 cm, the proposed models were calibrated. For the middle slide gates, the experimental results showed that the discharge prediction can be improved by introducing the Reynolds number. For the slide gates located at the middle of the channel, the best proposed model has an average error of 1.40% with a maximum error of 7.12%. For the slide gates located at the end of the channel, the Reynolds number has no significant effect and best proposed model has an average error of 2.47% with a maximum error of 6.59%. The results also showed that the flow discharge of the end slide gate (with unconfined free jet under gravity) is higher than the flow discharge of the middle slide gate for the same gate opening areas and upstream flow depths. The proposed sluice/slide gate for circular open channels offers a simple and reliable discharge measurement approach with acceptable accuracy. 相似文献