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1451.西北太平洋强温带气旋活动的气候特征分析
[铁路、船舶、航空航天和其他运输设备制造业] [2015-10-07]
为给航行船舶有效防避强温带气旋提供参考,利用日本发布的2006—2013年亚洲地面分析图,对西北太平洋近中心最大风力达10级或以上的强温带气旋活动的气候特征进行分析。经过分析,得到的结论主要有:西北太平洋强温带气旋平均每年产生63个,冬季产生频数最高,占总数的50%;产生和发展的高频海域位于35°N~50°N,140°E~175°E,中国东部沿岸及近海海域极少有气旋迅速发展;移速一般在10~35 kn,春季移动最快,秋冬季次之,夏季最慢,移向以E~NE为主,其次为NNE~N;近中心最低气压一般在950~990 h Pa,平均为974 h Pa;近中心最大风速在50~75 kn,10级大风发生频率为70%,11级及以上大风发生频率为30%;10级以上大风持续时间一般为6~72 h,其中24~48 h发生频率最高;西北太平洋强温带气旋中,55%左右为爆发性气旋,主要发生在9月至次年5月,冬季发生频数最高,占总数的60%以上。
关键词:西北太平洋;温带气旋;气候特征;分析
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1452.内河水网航道通过能力仿真
[铁路、船舶、航空航天和其他运输设备制造业] [2015-10-07]
受船舶行为的复杂性和航路选择的多样性等多种复杂因素的影响,开展内河水网航道通过能力研究的难度与复杂程度较高。基于此,以浙江省湖州内河水网为例,通过SIVAK软件,仿真正常情形(双向通航)和交通管制情形(单向通航、停航或混合通航模式)等,得到船舶容量、等待时间和平均速度等内容的仿真结果。该研究可为水网中复杂交通机理探索、交通瓶颈成因分析和交通管理服务等提供借鉴和参考。
关键词:水路运输;内河水网;通过能力;鲁棒性;延迟时间;交通管理
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1453.基于可变形船模的稳性计算
[铁路、船舶、航空航天和其他运输设备制造业] [2015-10-07]
为解决受限水域对可通航船舶尺度限制的问题,设计一种通过采用特别构造和利用船舶自身配备的装置而在航行过程中改变自身吃水的可变形船舶模型。以这种可变形船模为研究对象,通过分析船舶变形前后的形态特征,探讨其初稳性的变化情况;针对可变形船舶的特点,初步推导附加气囊后的浮心位置计算公式。基于SITC公司的某1万吨级集装箱船的实船参数,以1:180比例缩小的该船的船舶模型的基本参数和试验数据为依据,对该计算公式进行校验。
关键词:船舶工程;可变形船舶;船舶稳性;初稳性变化;计算模型
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1454.基于无限元方法预报非均匀流中螺旋桨的流噪声
[铁路、船舶、航空航天和其他运输设备制造业] [2015-10-07]
为了系统地研究非均匀流场中螺旋桨流噪声的特点,采用CFD与声学无限元方法结合的方式,对螺旋桨的频域噪声进行数值预报。通过采用大涡模拟方法对非均匀流场中的螺旋桨水动力性能进行计算,然后运用ACTRAN软件的声学无限元方法,对螺旋桨的无空泡噪声进行数值模拟,并对特征点进行频域分析。流场计算结果显示:非定常计算得到的螺旋桨水动力系数与试验值吻合良好,LES模拟得到的流场初值是可信的;通过分析噪声分布云图及特征点频谱曲线得出:非均匀流场中螺旋桨的辐射噪声主要集中在低频段,且该频段的噪声主要由偶极子组成,同时噪声衰减速度随频率增大而减小,螺旋桨轴向声压级高于径向两侧,验证了计算结果的可靠性,为螺旋桨的水下噪声预报提供了一种新的方法。
关键词:螺旋桨;非均匀流场;无限元方法;无空泡噪声
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1455.大风浪条件下船舶风险状况动态评估预警系统
[铁路、船舶、航空航天和其他运输设备制造业] [2015-10-07]
为有效减少大风浪条件下中国北方海域的恶性船舶翻沉事故的发生次数,针对目前国内缺乏个性化、可视化且具有动态显示和风险评估功能的海事气象保障服务产品的现状,根据前期建立的大风浪条件下的渤海海域重点船舶风险评估模型和船舶-大风浪区动态显示系统,在天津市气象局的“天津海洋气象精细化预报综合业务平台”上研发可在大风浪来临前对中国北方海域易发生海上事故的船舶进行海区和航线风险评估及预警的海事气象保障服务系统。实例分析表明,该系统可动态、直观、有效地给出特定船舶在某海区航行可能遇到的风险状况,可作为行之有效的船舶气象安全保障辅助决策产品供航运安全管理部门和海事安全管理部门使用。
关键词:水路运输;海事气象安全保障;船舶安全;大风浪天气;动态安全评估;预警系统
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1456.全球飞机除冰市场报告(2015-2019年)
[铁路、船舶、航空航天和其他运输设备制造业,电气机械和器材制造业] [2015-10-06]
The global de-icing market consists of three major products: de-icer trucks, snow blowers and sweepers, and de-icing chemicals and fluids, which enable the safe flight operation of an aircraft. Government organizations such as FAA have mandated the de-icing of each and every aircraft, before flight operation, to ensure the safety of the passengers and the airline. We expect the global aircraft de-icing market to grow at a CAGR of 3.68% during the period 2014-2019. In 2014, the market was led by the Americas with a share of 61.48%, followed by EMEA with 34.69% and APAC with 3.83%.
关键词:除冰市场;除冰车;雪鼓风机;清扫器;除冰化学品;流体;安全飞行;飞机的操作
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1457.全球航空航天和国防工业cPDM市场报告(2015-2019年)
[铁路、船舶、航空航天和其他运输设备制造业,公共管理、社会保障和社会组织] [2015-09-20]
Product lifecycle management (PLM) is used to manage a product, from its conception to the service and delivery of the manufactured product. Manufacturing companies need the PLM software to deal with various functionalities at different levels of an organization, including designing, engineering, and manufacturing of the products. Expanding product portfolios and the complexities involved in product development have boosted the demand for a system that can act as one-stop solution for production processes across industries. The implementation of PLM in an organization results in higher revenue, reduced cost, and capital efficiency.
关键词:产品生命周期管理;管理产品;概念;服务;设计的产品;工程和制造;降低成本;资金使用效率
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1458.全球商用飞机零部件制造人批准市场报告(2015-2019年)
[铁路、船舶、航空航天和其他运输设备制造业] [2015-09-06]
Aircraft PMA parts are manufactured according to the Federal Aviation Administration (FAA) design and production approval process. These parts are approved replacements for the original OEM parts. The production of aircraft PMA parts by thirdparty companies started in the US in the 1950s. In the absence of PMA manufacturers, OEMs have the monopoly over the design and manufacture of aircraft and aftermarket parts.
关键词:航空;PMA件;制造;设计和生产;批准程序;OEM部件
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1459.全球装甲车辆升级和改造市场报告(2015-2019年)
[铁路、船舶、航空航天和其他运输设备制造业,汽车制造业] [2015-09-06]
Armored vehicles include ground combat and transportation vehicles used by landbased military forces for operations such as transporting cargo and military personnel, as well as for operating in active combats. These vehicles are protected by armor and in many cases armed with weapons. Armored vehicles provide significant strength to a country’s army and are used in large numbers by military forces around the world.
关键词:装甲车;陆基地面作战;运输车辆;活性搏斗操作;装甲保护
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1460.全球无人水下航行器市场报告(2015-2019年)
[计算机、通信和其他电子设备制造业,铁路、船舶、航空航天和其他运输设备制造业] [2015-09-06]
An unmanned underwater vehicle is a small submarine used for underwater tasks. They can be divided into two categories: ROV and AUV. ROVs are usually tethered with cables, whereas AUVs operate independently and are remotely controlled. ROVs are divided into two classes: work class and eyeball. Work class ROVs are large and heavy and have the ability to lift large equipment. Eyeball ROVs are small and used in scientific exploration, inspection, observation, and rescue. AUVs are untethered and are programmed to gather oceanographic data for a set period, without any human supervision. Payloads are attached to the unmanned underwater vehicles; they help collect data and enhance the functionality of the vehicles.
关键词:无人水下航行器;小型潜艇;ROV;水下机器人;遥控潜水器;独立运作;远程控制;收集;海洋数据