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文章按照本质安全型的防爆标准,提出了船用声力电话的防爆选型、防爆设计分析和方法,阐述了电气设备的防爆设计。 相似文献
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船用台风路径和强度预报方法 总被引:1,自引:0,他引:1
改进了船用台风短期预报方法并提出了一种中期预报的新方法。前者通过增大样本和扩大海区范围,分别对东海、南海和西北太平洋海区建立6h~72h的CLIPER路径预报方程。后者通过联合应用逐步回归、相似离度、数据库和最小二乘法来预报台风6h~144h的路径和强度。结果表明,改进方法效果明显,可成为船用台风短期路径预报的基本方法;新方法能有效预报台风中期趋势、衰亡时间,还对异常台风有一定预报能力;预报精度较高,且操作简便易行,适合装有微机的船舶使用 相似文献
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探究船用离心泵产品可靠性的若干基本概念,泵产品常选的可靠性指标,可靠性设计的基本程序以及泵产品可靠性指标量值的选用和确定方法,提出了有关的意见和建议。 相似文献
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对大型货船舱室分隔和舱室布置的依据和原则、防火分隔的划分、防火材料的现状和应用、风管和电缆穿过防火分隔的保护方法、减少噪声途径等方面进行了总结,特别是对舱室防火作了重点介绍。对照国外船舶内装设计方法和有关资料,可以看出国内船舶内装设计和国外还存在一定差距。希望不久的将来,在船舶舱室专业设计人员的共同努力下,使内装设计水平得到进一步提高。 相似文献
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32000DWT散货船货舱段结构强度分析 总被引:1,自引:0,他引:1
利用MSC/Patran、MSC/Nastran软件分析了32000DWT散货船货舱段强度。给出了外载荷的计算方法和边界条件的施加方法,计算了典型的3种工况下32000DWT散货船的强度。通过有限元强度分析得到的结论可用于散货船的结构设计和优化。计算结果表明,本船的结构强度满足规范要求。 相似文献
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This article introduces novel extreme value prediction method that can be used for a variety of offshore engineering applications. First, to demonstrate the novel method, fictitious data from a non-linear Duffing oscillator and measured wave heights were used as examples. The second incident included a container ship that experienced significant deck panel strains while traveling across the Atlantic Ocean in bad weather. The main concern for cargo ship transportation is potential loss of container owing to violent movements. It is challenging to model such a situation because waves and ship motions are both non-stationary and complicatedly nonlinear. Extreme motions greatly increase the role of nonlinearities, activating effects of second and higher order.Furthermore, due to the scaling and the choice of sea state, laboratory testing may also be called into doubt. Therefore, data collected from actual ships during difficult weather voyages offers a special perspective on the statistics of ship motions.This paper aims to highlight an alternative method of extrapolation that is based on intrinsic properties of the data set itself and does not assume any extrapolation functional class. Extreme value predictions typically originate from certain statistical distribution functional classes to fit the data and then extrapolate. Engineering design can make use of the unique extrapolation method that has been proposed. The proposed method's forecast accuracy has been verified in comparison to the Averaged Conditional Exceedance Rate (ACER) extrapolation method. 相似文献
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结合某液货船的惰气发生系统,本文介绍了液货船惰气电控系统的设计原则,惰气发生系统的工艺流程及其功能设计,讲述了一套完整的船舶惰气自动控制方案. 相似文献
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本文对采用模型设计和模型试验方法研制大型离心泵的计算理论,结构设计和材料选用等问题进行了探讨,确认了只有在正确运用相似计算公式的前提下才能保证相似设计可靠性的观点,验证了叶轮进口截面几何形状对离心泵汽蚀性能和效率值的影响,并提出了国内现有的能较好满足船艇货油泵运转条件的材料组合建议方案。 相似文献