第二百五十九章美国之行(9)这是基本
最新网址:m.ltxsdz.com
没错,确实是这种下水法,整个船身便沿着倾斜的船台横向侧向下水。最新地址ltxsba.pw.M这艘由成千上万吨钢铁构成的庞然大物瞬间倒向水中,激起了排空巨浪,又快地自动扶正,几经剧烈摇摆,最后终于稳稳当当的停在了水里。这由静变动又由动转静的过程,虽然时间不长,但还是非常的壮观啊。
亨利上校转过身,对还望着水面安德烈说道:“将军,怎么样,您从来没见过舰船是这样下水的吧?”
安德烈立即摇摇头,然后回答道:“亨利上校,以前只是听说过我还是第一次亲眼见到侧向下水呢,不过我记得这种下水方式对于舰体强度的要求是十分高的啊?”
亨利上校笑了笑说道:“将军果然内行啊,先我要说的这种横向侧滑下水,有很大的优点因为是使用较短的横向滑道,船舶利用重力横向侧翻落入水中,再依靠浮力将船身扶正,漂浮在水中。这种侧滑的下水方式,比较适合水域面积较小,船台滑道长度不足,没有开阔水域可供纵向下水的地方,特别适合船只集中批量建造船舶的船厂。”
我等他说完,想了想问道:“上校,但是横向侧滑下水对船体的振动和冲击比较大,是否会引起船上已安装设备的如果舰体强度不够不仅仅是船身连设备也有可能受损啊变?”
安德烈想起了横向侧滑下水的资料。由于横向侧滑下水对舰体和舰上设备的冲击力较大,容易引起舰体结构变形或设备损坏,所以侧滑下水的军舰设计和建造工艺都有很高的要求。
一直以来造船业的舰船建造过程中,有一项很重要的工作,就是下水。船舶下水的方式有很多种,按照运动方式分为重力式的纵向下水和横向下水,适合绝大多数船舶;漂浮式的船坞下水,适合大型船舶。
坞下水属于漂浮式下水方式,最古老也最简单,就是船舶直接在船坞里建造,建好后,船坞注水,让船舶依靠福利自己浮起来,再打开船坞船闸,下水就完成了。船坞下水的缺点是花费较大,这里指的不是下水辅助材料的花费,而是指船坞注水和抽水的费用。
现代大型船舶通常都采用船坞下水,例如美国海军最新一代核动力航空母舰舰“福特”号于2o月11日下水式,就是采用船坞注水式下水,原因很简单,这艘核动力航母排水量高达万吨,不适合重力式下水。
纵向下水是现代造船业最常见的,舰船在建造时,船台呈的坡度,船尾向着海边,轮船沿滑道“退入”海中。纵向下水的工艺比较复杂,因为下水时船尾先接触海水上浮,期间船还在滑道上,容易因重力引起船舶结构变形,所以纵向下水对船台和船舶结构强度要求较高。
在古代帆船下水通常采用滚木或滑道涂抹牛油的纵向下水,现代造船的纵向下水通常使用钢制滚珠。纵向下水优点是适用范围广,大中小型船舶都可采用,下水设备简单,花费比较少,下水滑道和辅助材料都可以回收再利用。
而侧滑下水的缺点上面已经说了就是对舰体的要求非常高啊,因为瞬间的冲击太大了。
而且侧向下水只适合于小吨位,吨位太高的一般还不敢这么干呢!当然也不绝对后世世界上最大横向侧滑下水的船舶是由中国建造的,2oo8年武汉青山造船厂建造的5.7万吨级散货轮,因为青山造船厂属于内河船厂,船台滑道长度不足,船厂面对的长江水域也不够开阔,于是采用横向侧翻入水的方式,从而创造了世界纪录,并一直保持。
接下来,亨利上校说道:“所以我们会安排工程技术人员对军舰进行检测的。”至于更多的东西,亨利都没有继续聊天,在诺福克基地逛了一会儿,到了饭点了,安德烈利说道:“上校,你们美国海军的伙食标准我记得可是很高的啊,不知道我能尝一尝吗?”亨利哈哈大笑道:“将军真是客气了,其实我们的水兵们可是对于伙食有很大意见的!”而安德烈开始说道:“1933年11月27日开始的纽约号战列舰公共食堂一周菜单
周一
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周二
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晚餐:烤牛肉和猪肉条酱色肉汁配炸土豆烘炉烤豆柠檬蛋白馅饼洋葱片面包黄油茶
周四
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午餐:“感恩节特餐”
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