排序方式: 共有34条查询结果,搜索用时 361 毫秒
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液货船船岸界面存在作业风险高、作业管理不规范、船岸双方安全生产责任未严格落实等问题.通过对辖区船岸界面作业现状分析,围绕液货船船岸界面作业安全管理存在的实际问题,识别船岸界面作业风险点.为散装液体危险货物作业安全、规范船岸界面安全管理、完善船岸安全检查机制等提出建议. 相似文献
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文章结合具体典型问题,详细阐释了轿车行李箱盖水管理及相关防水设计。结构开发设计、CAE仿真模拟和防水测试实验结合,不仅阐释了各类水问题和排水的渠道,也提供了典型的漏水问题以及相应的解决方案。为行李箱盖漏水问题提供了解决的思路和设计参考。 相似文献
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Previous studies have reported ultrafine particle (UFP) infiltration to the in-cabin microenvironment; however, no systematic measurements have been conducted showing where and under what conditions infiltration occurs. This study examined the automotive envelope leakage and UFP infiltration. We measured the differential pressures between the cabin and the potential leakage area on the surface of 11 passenger vehicles of different models/makers. To identify location of infiltration, UFP concentrations were concurrently measured inside and outside the vehicles as well as near the rear trunks. This study found that UFP infiltration primarily occurs through the rear trunk leakage under recirculation (RC) mode. Under RC mode, aerodynamic effects of a moving vehicle made the surface pressure on the side doors lower (i.e., exfiltration) than the cabin pressure, but higher (i.e., infiltration) on the rear trunk. The UFP concentrations measured near the rear trunks were 2–9 folds higher than inside vehicles. The magnitude of pressure differences increased at higher driving speeds. Under outdoor air (OA) mode, the infiltration was rarely observed because of the fan-controlled cabin pressurization. These data provide the first experimental evidence showing that UFP infiltration into passenger vehicles is location-specific and driving-speed-dependent. 相似文献
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基于起重机钢丝绳滑轮疲劳试验台,运用钢丝绳的磁检测技术,研究了钢丝绳周向漏磁场强度随疲劳循环次数的变化规律,发现随着疲劳程度的增加,钢丝绳周向漏磁场强度逐渐增大,磁导率逐渐减小,且沿钢丝绳轴向长度的分布越来越不均匀.研究表明,可以通过分析磁化性质的变化判断钢丝绳的疲劳程度. 相似文献
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Choung Mook?LeeEmail author Dong Gi?Han Kwan Hyoung?Kang Sang Joon?Lee 《Journal of Marine Science and Technology》2004,8(3):117-125
The behavior of the flow passing a tandem oil fence, and the performance of the fence, were investigated by experimental and numerical methods. The flow characteristics between tandem fences were measured by the particle image velocimetry (PIV) method for the rigid and open free surface between the two fences in order to gather reference data for numerical investigations. A method of assessing a tandem fence by tracing the movement of an oil droplet around the fence is introduced. The effect of the current speed, the separation distance between the two fences, the relative draft of the two fences, and the water depth on the oil containment between the fences was investigated. 相似文献
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阐述四端网络的基本计算方法,根据无绝缘轨道电路电气绝缘节的绝缘机理,对窜码的必然性进行了定性分析,并通过四端T型网络计算进行定量分析。 相似文献
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