航空母舰上飞机的拦阻动力学涉及绳索中瞬态波的传播过程和飞机的平稳减速过程。这给整个过程的模拟带来了很大的挑战,因为前者需要较小的时间步长来保证稳定性,而后者需要较大的时间步长来减少计算时间。针对这一问题,本文提出了一种采用变时间步长积分方案的拦阻装置系统全尺寸多体动力学模型。特别地,采用一种能够描述三维空间中任意大位移和转动的新型缆单元来网格化钢丝绳,并采用阻尼力来模拟液压系统的影响。然后,研究了着舰过程中钢丝绳的应力。结果表明,应力峰值主要来源于应力波在甲板滑轮间的传播、反射和叠加。偏离中心线着陆时的最大应力略小于沿中心线着陆时的最大应力。本文提出的多体进近和拦阻装置系统模型也为整个机构的设计和优化提供了一种有效的方法。
外窗和内窗的窗帘应为商用 25 毫米(1 英寸)水平铝制百叶窗,可调节升降和叶片倾斜度,配有透明防滑倾斜杆和钢丝绳锁。验收标准:Levolor(Contract)Monaco 或 Abbey Classics Supreme)或同等标准。例外:租赁空间:外窗窗帘应与房东商定,以确保外观美观统一。为避免电脑屏幕眩光,请勿为外窗应用选择高反射性饰面。
2.2 门 2.2.1 织物门扇 2.2.2 中间门梁 2.2.3 门导轨 2.3 电动操作器 2.3.1 驱动装置 2.3.2 皮带/钢丝绳系统 2.3.3 门防坠装置 2.3.3.1 门扇安全制动装置 2.3.3.2 门扇安全制动装置替代方案 2.3.3.3 上摆门竖框安全制动装置 2.3.4 松弛皮带/钢丝绳断路器 2.3.5 电机 2.3.6 控制装置 2.3.6.1 控制面板外壳 2.3.7 限位开关 2.3.8 门控制报警装置 2.3.9 安全装置 2.3.10 控制变压器 2.3.11 电气元件 2.3.12 带诊断功能的用户界面 2.4 标题箱体 2.5 底梁 2.6 风锁 2.7 上翻竖框(如有注明) 2.7.1 竖框坑和盖(如有注明) 2.7.2 伸缩竖框销和地板扣件 2.8 人员门 2.9 操作 2.9.1 门操作 2.9.2 电动操作 2.9.3 备用门操作 2.10 饰面 2.10.1 黑色金属 2.10.2 铝 2.11 标牌
使用经纬仪导航标记浮标的位置。UCT ONE 的潜水员随后安装标记浮标,保持在 20 英尺的公差范围内。SEACON 就位并发射 PEA。安装所有三个后进行 50 千磅的拉力测试。每次发射 PEA 后,UCT ONE 潜水员都会检查锚,而 SEACON 则移向下一个地点。他们仔细检查了弹坑附近的钢丝绳,以确定吊坠在发射过程中是否受损。他们还从穿透点到第一个配件进行了测量,以确定穿透深度。
第 1 节。一般····················································································································· 3 第 2-1 节。轧制钢 ············································································································ 7 第 2-2 节。轧制钢半成品 ························································································ 15 第 2-3 节。用于高热输入焊接的轧制钢 ··········································· 17 第 2-4 节。YP47钢板········································································································· 19 第2-5节。具有改进的疲劳性能的船体结构钢 ····························· 21 第 3 节。钢管 ··································································································· 24 第 4 节。铸件和钢锻件·· ... ·· ...铜和铜合金管 ·············································································· 35 第 8 节。特殊铸铁阀门 ·· ... ·· ...船用链条附件····························································································· 44 第 10-3 节。海上链条和链条附件·································································· 46 第 11 节。钢丝绳· ... ·· ... ·························································································· 60
第 1 节。一般····················································································································· 3 第 2-1 节。轧制钢 ······································································································ 8 第 2-2 节。轧制钢半成品 ········································································ 16 第 2-3 节。用于高热输入焊接的轧制钢 ········································ 18 第 2-4 节。YP47钢板···································································································· 20 第2-5节。具有改进疲劳性能的船体结构钢····································· 22 第2-6节。焊接结构用高强度钢 ························································· 25 第 3 节。钢管 ·· ... ·· ... ·· ...铜和铜合金管··········································································· 44 第 8 节。特殊铸铁阀门·············································································································· 48 第 9 节。锚·· ...船用链条附件····························································································· 53 第 10-3 节。海上链条和链条附件····································································· 55 第 11 节。钢丝绳· ... ·· ...锅炉与压力容器··········································································································· 70
第 1 节。一般····················································································································· 3 第 2-1 节。轧制钢材··········································································································· 7 第 2-2 节。轧制钢材半成品··············································································· 15 第 2-3 节。用于高热输入焊接的轧制钢材 ····························· 17 第 3 节。钢管 ································································································ 19 第 4 节。铸件和钢锻件 ·· ...第 5 节。特殊要求的曲轴 ······························································· 23 第 6 节。铝合金 ··································································································································· 26 第 7-1 节。铜合金铸件······························································································· 29 第 7-2 节。铜和铜合金管 ············································································· 30 第 8 节。特殊铸铁阀门 ···················································································································· 34 第 9 节。锚·· ...船用链条附件···································································································· 39 第 10-3 节。海上链条和链条附件································································ 41 第 11 节。钢丝绳· ... ·· ... ···························································································· 55
ASTM F436 ,1 级,螺栓符合 ASTM A307 标准。确保螺母、垫圈和螺栓按照 AASHTO M232 C 级进行热浸涂层,或按照 ASTM B695 50 级进行机械涂层。(4)提供符合计划并按照 ASTM A741 进行镀锌的钢丝绳和配件。(5)安装前,将镀锌部件存放在地面以上,远离表面径流。如果镀锌层受到物理损坏或氧化,部门可能会拒收材料。(6)提供制造商的图纸以及专有系统的安装和维护说明。(7)提供 APL 的车间应用的 F 型反光膜。(8)提供符合 WMUTCD 中所示的 3 型物体标记图案的物体标记。(9)提供 APL 的护栏反射器。
– 概述:油田设备和材料 1 – 海上结构 3 – 井架和桅杆 8 – 管材 9 – 阀门和井口设备 14 – 钻井设备 17 – 起重工具 19 – 钢丝绳 20 – 油井水泥 20 – 现场作业设备 23 – 租赁生产船 26 – 钻井、完井和压裂液 27 – 海上安全和防污染 30 – 玻璃纤维和塑料管 31 – 钻井井控设备和系统 32 – 海底生产系统 34 – 完井设备 40 – 供应链管理 43 – 钻井和生产作业 45 – 培训 48 – 社区参与 49 – 健康、环境和安全 – 勘探和生产安全标准 49 – 概述 51 – 天然放射性物质 52 – 废物 52 – 安全 53