CN117104389B - 一种可形状回复的减振潜艇耐压外壳制备方法 - Google Patents
一种可形状回复的减振潜艇耐压外壳制备方法 Download PDFInfo
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Abstract
本发明公开了一种可形状回复的减振潜艇耐压外壳制备方法,属于船舶及潜航器技术领域,包括潜艇骨架和耐压外壳体,耐压外壳体由内至外分别为内缓层、核心层和防护层,防护层与内缓层的材料都是层状的碳纤维热塑性与树脂基复合材料;核心层为多个单元组件拼接而成,单元组件包括单元组件外壳、设置在单元组件外壳内部的晶格点阵结构,单元组件外壳和晶格点阵结构材料为NiTi形状记忆合金;内缓层中均匀嵌入若干组独立的导热丝,导热丝为单元组件外壳内的晶格点阵结构提供热量使其达到记忆回复温度,本发明采用的层状的碳纤维热塑性与树脂基复合材料相对于传统钛合金耐压外壳,减振性能更好,质量更轻,具有抗干扰特性。
Description
技术领域
本发明属于船舶及潜航器技术领域,具体涉及一种可形状回复的减振潜艇耐压外壳制备方法。
背景技术
潜艇作为主要的海上作战工具在军事领域的运用已经越来越广泛,由于反潜艇技术的逐渐成熟,在潜艇进行勘测任务以及战略军事反击时,往往会因自身振动产生的声波信号被敌军声呐系统捕捉,进而导致被发现并遭遇打击,因此如何减小振动,增强潜艇的“隐身”性能变得愈发重要。
潜艇耐压外壳是潜艇执行任务过程中极其重要的保护装置,对于混合式无人潜艇,一方面耐压外壳可以保障潜艇在水下承受深水压力;另一方面在潜艇受到水中兵器冲击时可以通过耐压外壳变形吸收爆炸产生的冲击能量,进而防止潜艇内部结构进一步受损,保障功能使用。
现有潜艇耐压外壳的制备主要用到的是钛合金和HY钢,其中钛合金的密度是4.51g/cm3 ,但是制备而成的耐压外壳较为沉重,容易影响潜艇航速,且减振性能不佳,容易被反潜艇勘测装置发现。因此,可以选用部分材料进行替换,提高其减振性能,并使其更加轻便。改良的碳纤维增强树脂基复合材料如CFF/PPS的密度为 1.35 g/cm3,相对于其他金属材料密度较低,质量较轻,具有优异的振动衰减功能,可以有效地降低振动和噪声,其弯曲强度953.7MPa,拉伸强度797.4MPa,模量68.4GPa,冲击强度58.3kJ/m2,符合耐压外壳强度要求,且具有良好的导电导热性能,耐腐蚀,耐疲劳,是理想的耐压外壳替代材料之一。
现有服役无人潜艇根据任务需要有单体式,双体式以及混合壳体式,其中由于水下工况的复杂,混合壳体无人潜艇的应用愈发常见。目前具备混合壳体的无人潜艇如果在水下远距离遭受鱼雷等反潜艇兵器打击,非耐压壳体会承受主要的爆炸伤害从而形成凹坑,而内部的耐压外壳会在爆炸产生的冲击力的作用下受损,往往需要返回基地更换材料,修复受损结构,而耐压外壳修复过程整体耗时较长且修复难度较大,导致任务效率低下。因此,如何缩短无人潜艇修复周期,提高潜艇执行任务效率是潜艇结构领域主要面临的难题之一,而随着增材制造技术的发展,在航天航空等重要军工领域利用NiTi等形状记忆合金材料填充结构愈发常见,通过在耐压外壳内设置内部电路,可以采用电流热激励的方法,使其在较短的时间内完成NiTi合金材料中马氏体相到奥氏体相的转变,发挥NiTi形状记忆合金的“形状回复效应”,帮助修复受损结构,缩短修复周期。
发明内容
本发明的目的在于提供一种可形状回复的减振潜艇耐压外壳制备方法,具备良好的抗压抗冲击性能,耐腐蚀,抗干扰,硬度大,在提高潜艇“隐身”性能的同时,结构轻便,便于提高航速。
一种可形状回复的减振潜艇耐压外壳,包括潜艇骨架和耐压外壳体,耐压外壳体由内至外分别为内缓层、核心层和防护层,潜艇骨架通过环氧树脂连接在内缓层的内表面上,非耐压壳体通过焊接与耐压外壳体的防护层外侧相连接,当耐压外壳体受到冲击时,主要由防护层和核心层承力,内缓层则吸收核心层传递下来的剩余缓冲力;
防护层与内缓层的材料都是层状的碳纤维热塑性与树脂基复合材料;
核心层为多个单元组件拼接而成,单元组件包括单元组件外壳、设置在单元组件外壳内部的晶格点阵结构,单元组件外壳和晶格点阵结构材料为NiTi形状记忆合金;
内缓层中均匀嵌入若干组独立的导热丝,潜艇内部设置的电源通过遥控开关与若干组独立的导热丝连通,导热丝为单元组件外壳内的晶格点阵结构提供热量使其达到记忆回复温度,若干组独立的导热丝在内缓层中分区域独立运行。
优选的,所述的晶格点阵结构包括六环型薄壁-0型结构阵列、对称弧形曲面-0型结构阵列、双箭尾型-0型结构阵列、对称双螺旋型-0型结构阵列、对称环形梁型-0型结构阵列或四弧肋型-0型结构阵列。
优选的,所述的六环型薄壁-0型结构阵列的设计方法为:首先根据尺寸参数e设计扫描路径,利用曲线路径进行扫掠,构造出边距为s的三维环形肋条,对三维环形肋条进行加厚以及圆角优化处理,使三维环形肋条基于中心轴线进行等间距圆周阵列6次,构造出六环型薄壁-0型结构,将该六环型薄壁-0型结构按照尺寸参数e沿着水平以及垂直方向进行线性阵列形成六环型薄壁-0型结构阵列,将其填充入单元组件外壳内部。
优选的,所述的对称弧形曲面-0型结构阵列的设计方法为:首先根据弧度角α,尺寸参数a1与b1绘制对称曲线,再根据曲线路径进行扫掠并加厚得到子结构,将子结构相对于中心轴进行旋转复制实体,旋转角度为270°,保证两个子结构的开口闭合,从而构成对称弧形曲面-0型结构;以单个对称弧形曲面-0型结构左右棱角四个顶点为基础,保证左右连接排列时相互形成凹角,凹角与弧度角α一致,沿着水平以及垂直方向进行线性阵列形成对称弧形曲面-0型结构阵列,将其填充入单元组件外壳内部。
优选的,所述的双箭尾型-0型结构阵列的设计方法为:首先,通过宽度参数g与高度参数h设计出基础对称双箭头薄壁模型,其中设计四个半径为r1的弧形肋条替代直肋,同时内部添加两个半径为r2的弧形梁稳固支撑,基于此部分单元体进行优化,为其上下两部分添加横梁与直梁用以支撑稳定变形,得到双箭尾型-0型结构,将双箭尾型-0型结构沿着宽度方向和高度方向线性阵列后形成双箭尾型-0型结构阵列,四个弧形肋条位置处能相互耦合拼接以稳固变形,将其填充入单元组件外壳内部。
优选的,所述的对称双螺旋-0型结构阵列的设计方法为:通过水平参数i以及弧度角β设计出四分之一胞元的扫掠路径,且其扫掠的横截面积为j²,然后基于水平轴线进行一次旋转复制,旋转角度为180°,得到二分之一胞元,再利用水平轴线进行实体镜像,得到基础单元体,为基础单元体底部添加基座进行结构优化,基座直径宽于水平参数i,得到对称双螺旋-0型结构,选择以两个对称双螺旋-0型结构为一组成镜像对称连接后阵列形成对称双螺旋-0型结构阵列,将其填充入单元组件外壳内部。
优选的,所述的对称环形梁-0型结构阵列的设计方法为:基于参数h1与h2进行结构设计,沿指定路径进行扫掠,形成孔径为r3的环形肋条,两个相距h2的环形肋条中间拥有一个开口,在此基础上沿着弧形肋条中心轴线方向线性阵列五次,形成带有五个开口的二分之一胞元,再将该二分之一胞元沿中心轴线进行实体复制,五个开口得到闭合,从而构成对称环形梁-0型结构,将对称环形梁-0型结构沿着水平以及垂直方向进行线性阵列形成对称环形梁-0型结构阵列,将其填充入单元组件外壳内部。
优选的,所述的四弧肋型-0型结构阵列的设计方法为:根据尺寸参数c1与d1设计出二分之一胞元,要求纵向开口与横向开口的比值达到3∶5,此开口便于阵列后达到耦合效果,孔径为r4的弧形肋条均匀分布至二分之一胞元两侧形成子结构,将所得子结构沿着镜像轴进行实体镜像,镜像后得到四弧肋型-0型结构,将四弧肋型-0型结构沿着水平方向和垂直方向进行线性阵列形成四弧肋型-0型结构阵列,将其填充入单元组件外壳内部。
一种可形状回复的减振潜艇耐压外壳的制备方法,包括以下步骤:
步骤一,制备防护层与内缓层;
步骤二,通过雾化法处理好NiTi形状记忆合金粉末,利用选择性激光熔融技术依据尺寸排列逐层打印晶格点阵结构,并按照所设计的厚度填充至单元组件外壳内部;
步骤三,利用回填式摩擦点焊、热固化与铆接的方法分别处理核心层、防护层以及内缓层,完成耐压外壳体的连接;
步骤四,利用等离子喷涂机在防护层处喷涂超声波电磁干扰屏蔽涂层。
优选的,所述步骤三中的回填式摩擦点焊方法包括如下四个阶段:
下压阶段:利用夹紧环固定搅拌针和套筒,同时定位单元组件外壳,开启设备,搅拌针以及套筒保持逆时针旋转状态,同时沿法向方向向下压进,抵达单元组件外壳处进行摩擦预热,此时搅拌针压进尺寸较套筒大;
插入阶段:搅拌针向上回撤,套筒继续向下压进至指定深度;
回填阶段:搅拌针下压至指定深度,套筒回撤;
回撤阶段:搅拌针与套筒同步回撤,磨平后单元组件外壳表面形成平整凹坑。
与现有技术相比,本发明具有如下有益效果。
本发明采用的层状的碳纤维热塑性与树脂基复合材料相对于传统钛合金耐压外壳,减振性能更好,质量更轻,具有抗干扰特性,在提高了潜艇“隐身”性能的同时,提高了航速;
单元组件外壳和晶格点阵结构采用NiTi形状记忆合金材料,潜艇水下受损后经主控潜艇控制上浮至安全区域,利用其特有的“形状记忆”效应,采取电流热激励的方法,修复潜艇耐压外壳受损部位,缩短修复周期,提高执行任务效率;
各层之间的连接方式采用摩擦点焊、热固化与铆接的方法,相对于传统点焊工艺,连接更加紧密和稳固;
核心层采用的晶格点阵结构,相对于传统结构耐撞性能更加优异。
附图说明
图1是本发明的整体剖视图;
图2是马氏体与奥氏体相变曲线示意图;
图3是层状的碳纤维热塑性与树脂基复合材料制备过程原理示意图;
图4是六环型薄壁-0型结构阵列的设计方法以及填充方案示意图;
图5是对称弧形曲面-0型结构阵列的设计方法以及填充方案示意图;
图6是双箭尾型-0型结构阵列的设计方法以及填充方案示意图;
图7是对称双螺旋-0型结构阵列的设计方法以及填充方案示意图;
图8是对称环形梁-0型结构阵列的设计方法以及填充方案示意图;
图9是四弧肋型-0型结构阵列的设计方法以及填充方案示意图;
图10是利用回填式摩擦点焊方法处理单元体外壳的过程示意图;
图11是本发明中潜艇耐压外壳的回复效应示意图;
图中:1、内缓层;2、核心层;3、防护层;4、上固定模具;5、下固定模具;6、上石墨烯垫板;7、下石墨烯垫板;8、碳纤维预浸布;9、单元组件外壳;10、夹紧环;11、非耐压壳体;12、搅拌针;13、套筒;14、导热丝。
具体实施方式
为了更好的说明本发明涉及到的制备过程以及相对于现有技术的优点,将根据上述附图进行进一步讲解。
请参阅图1至图11所示,一种可形状回复的减振潜艇耐压外壳,包括潜艇骨架和耐压外壳体,耐压外壳体由内至外分别为内缓层1、核心层2和防护层3,潜艇骨架通过环氧树脂连接在内缓层1的内表面上,非耐压壳体11通过焊接与耐压外壳体的防护层3外侧相连接,当耐压外壳体受到冲击时,主要由防护层3和核心层2承力,内缓层1则吸收核心层2传递下来的剩余缓冲力;
防护层3与内缓层1的材料都是层状的碳纤维热塑性与树脂基复合材料;
核心层2为多个单元组件拼接而成,单元组件包括单元组件外壳9、设置在单元组件外壳9内部的晶格点阵结构,单元组件外壳9和晶格点阵结构材料为NiTi形状记忆合金,晶格点阵结构相较于传统蜂窝结构抗冲击性能更佳,耐撞性能更加优异,能降低潜艇面对冲击时的损伤程度;
内缓层1中均匀嵌入若干组独立的导热丝14,潜艇内部设置的电源通过遥控开关与若干组独立的导热丝14连通,导热丝14为单元组件外壳9内的晶格点阵结构提供热量使其达到记忆回复温度,若干组独立的导热丝14在内缓层1中分区域独立运行,一旦某区域受到冲击余波作用导致其线路损坏时不会影响其他区域的运作。
如图4至图9所示,具体的,所述的晶格点阵结构包括六环型薄壁-0型结构阵列、对称弧形曲面-0型结构阵列、双箭尾型-0型结构阵列、对称双螺旋型-0型结构阵列、对称环形梁型-0型结构阵列或四弧肋型-0型结构阵列。
具体的,如图4所示,所述的六环型薄壁-0型结构阵列的设计方法为:首先根据尺寸参数e设计扫描路径,利用曲线路径进行扫掠,构造出边距为s的三维环形肋条,如图4(a)所示,其次,对三维环形肋条进行加厚以及圆角优化处理,如图4(b)所示,最后,使三维环形肋条基于中心轴线进行等间距圆周阵列6次,构造出六环型薄壁-0型结构,如图4(c)所示;将该六环型薄壁-0型结构按照尺寸参数e沿着水平以及垂直方向进行线性阵列形成六环型薄壁-0型结构阵列,将其填充入单元组件外壳9内部效果如图4(d)所示。
具体的,如图5所示,所述的对称弧形曲面-0型结构阵列的设计方法为:首先根据弧度角α,尺寸参数a1与b1绘制对称曲线,如图5(a)所示,再根据曲线路径进行扫掠并加厚得到子结构,扫掠效果如图5(b)所示,最后,将子结构相对于中心轴进行旋转复制实体,旋转角度为270°,保证两个子结构的开口闭合,复制效果如图5(c)所示,从而构成对称弧形曲面-0型结构;以单个对称弧形曲面-0型结构左右棱角四个顶点为基础,保证左右连接排列时相互形成凹角,凹角与弧度角α一致,沿着水平以及垂直方向进行线性阵列形成对称弧形曲面-0型结构阵列,将其填充入单元组件外壳9内部效果如图5(d)所示。
具体的,如图6所示,所述的双箭尾型-0型结构阵列的设计方法为:首先,通过宽度参数g与高度参数h设计出基础对称双箭头薄壁模型,其中设计四个半径为r1的弧形肋条替代直肋,同时内部添加两个半径为r2的弧形梁稳固支撑,如图6(a)所示,然后基于此部分单元体进行优化,为其上下两部分添加横梁与直梁用以支撑稳定变形,得到双箭尾型-0型结构,如图6(b)所示;将双箭尾型-0型结构沿着宽度方向和高度方向线性阵列后形成双箭尾型-0型结构阵列,四个弧形肋条位置处可以相互耦合拼接以稳固变形,拼接效果如图6(c)所示,将其填充入单元组件外壳9内部效果如图6(d)所示。
具体的,如图7所示,所述的对称双螺旋-0型结构阵列的设计方法为:首先,如图7(a)所示,通过水平参数i以及弧度角β设计出四分之一胞元的扫掠路径,且其扫掠的横截面积为j²,然后基于水平轴线进行一次旋转复制,旋转角度为180°,得到如图7(b)所示二分之一胞元,再利用水平轴线进行实体镜像,得到基础单元体,同时为了进一步稳定变形,为基础单元体底部添加基座进行结构优化,基座直径略宽于水平参数i,由此得到完整的对称双螺旋-0型结构,如图7(c)所示;选择以两个对称双螺旋-0型结构为一组成镜像对称连接后阵列形成对称双螺旋-0型结构阵列,将其填充入单元组件外壳9内部效果如图7(d)所示。
具体的,如图8所示,所述的对称环形梁-0型结构阵列的设计方法为:首先,基于参数h1与h2进行结构设计,沿指定路径进行扫掠,形成孔径为r3的环形肋条,两个相距h2的环形肋条中间拥有一个开口,如图8(a)所示,在此基础上沿着弧形肋条中心轴线方向线性阵列五次,形成带有五个开口的二分之一胞元,如图8(b)所示,再将该二分之一胞元沿中心轴线进行实体复制,五个开口得到闭合,从而构成对称环形梁-0型结构,如图8(c)所示;最后将对称环形梁-0型结构沿着水平以及垂直方向进行线性阵列形成对称环形梁-0型结构阵列,将其填充入单元组件外壳9内部效果如图8(d)所示。
具体的,如图9所示,所述的四弧肋型-0型结构阵列的设计方法为:首先,根据尺寸参数c1与d1设计出二分之一胞元,要求纵向开口与横向开口的比值达到3∶5,此开口便于阵列后达到耦合效果,孔径为r4的弧形肋条均匀分布至二分之一胞元两侧形成子结构,如图9(a)所示,然后将所得子结构沿着镜像轴进行实体镜像,镜像后得到四弧肋型-0型结构,如图9(b)所示;将四弧肋型-0型结构沿着水平方向和垂直方向进行线性阵列形成四弧肋型-0型结构阵列,拼接效果如图9(c)所示,纵向和横向的开口会在弧肋的位置处得到耦合,将其填充入单元组件外壳9内部效果如图9(d)所示。
一种可形状回复的减振潜艇耐压外壳的制备方法,包括如下步骤:
步骤一,制备防护层3与内缓层1;
步骤二,通过雾化法处理好NiTi形状记忆合金粉末,利用选择性激光熔融技术依据尺寸排列逐层打印晶格点阵结构,并按照所设计的厚度填充至单元组件外壳9内部;
步骤三,利用回填式摩擦点焊、热固化与铆接的方法分别处理核心层2、防护层3以及内缓层1,完成耐压外壳体的连接;
步骤四,利用超高速等离子喷涂机在防护层3处喷涂超声波电磁干扰屏蔽涂层,进一步提升潜艇“隐身”性能。
具体的,所述步骤四中的超声波电磁干扰屏蔽涂层属于金属电磁屏蔽涂层,选择导电能力优异且性质稳定的银作为基体材料,纳米银颗粒经等离子喷涂机的喷射器送入,纳米银颗粒经等离子焰流加热至熔融状态,再经高速气流加压使其雾化,最后通过喷枪喷射至防护层3外部,同时,引入碳纳米管(CNTs)作为增强相,以同样的方法在纳米银的区域上进行喷射,形成等梯度的Ag/CNTs复合涂层,通过此方法制备出的涂层较为稳定,涂层质量高且屏蔽性能好。
具体的,所述步骤一中的碳纤维预浸布8由市面上购得的PPS(聚苯硫醚)材料通过在干态预浸机中进行涂膜、热压、冷却、覆膜、卷取,复合至碳纤维上制得。
具体的,所述步骤一中防护层3的制备方法如图3所示:将下石墨烯垫板7平放在下固定模具5上,把碳纤维预浸布8逐层放置在下石墨烯垫板7上,上石墨烯垫板6放置在碳纤维预浸布8上,上固定模具4平放在上石墨烯垫板6上,利用支架固定上石墨烯垫板6、下石墨烯垫板7与碳纤维预浸布8,由于后续采用回填式摩擦点焊方法处理核心层2结构时会留下平整凹坑,因此需要调整上固定模具4与下固定模具5成型面至目标形状,使上固定模具4向下运动,对于支架上的上石墨烯垫板6施加压力,同时,下固定模具5向上运动,当上固定模具4与下固定模具5合模以后,在压力作用下碳纤维预浸布8得到符合目标形状的预成型件,保持上固定模具4与下固定模具5合模状态下,使上石墨烯垫板6和下石墨烯垫板7内的石墨烯电热膜通电加热,使预成型件固化。
具体的,所述步骤三中的回填式摩擦点焊方法包括:由于在摩擦点焊中的搅拌针12和套筒13高速搅动产生的摩擦热与机械力的作用下,单元组件外壳9一部分金属变成塑性流动状态,冷却之后形成金属凹坑,具体包括如下四个阶段:下压阶段,插入阶段,回填阶段以及回撤阶段,如图10所示;
下压阶段:利用夹紧环10固定搅拌针12和套筒13,同时定位单元组件外壳9,开启设备,搅拌针12以及套筒13保持逆时针旋转状态,同时沿法向方向向下压进,抵达单元组件外壳9处进行摩擦预热,此时搅拌针12压进尺寸较套筒13大;
插入阶段:搅拌针12向上稍稍回撤,套筒13继续向下压进至指定深度;回填阶段:搅拌针12下压至指定深度,套筒13回撤;
回撤阶段:搅拌针12与套筒13同步回撤,磨平后单元组件外壳9表面形成平整凹坑。
具体的,所述步骤三中的热固化与铆接方法为:将单元组件外壳9嵌入层状的碳纤维热塑性与树脂基复合材料中;再加热层状的碳纤维热塑性与树脂基复合材料,层状的碳纤维热塑性与树脂基复合材料中的树脂基受热熔化,在压力作用下凝固,从而在单元组件外壳9和层状的碳纤维热塑性与树脂基复合材料之间形成粘附力;
对层状的碳纤维热塑性与树脂基复合材料与单元组件外壳9进行铆接,提高其连接强度。
本发明的工作原理:
在具备混合壳体的无人潜艇执行任务过程中,如果遭受水下兵器爆炸冲击,最外层的非耐压壳体11会承受住爆炸产生的主要伤害且不至于被破坏,而内部的耐压外壳体会如图11(a)所示由于爆炸产生的冲击波作用发生破坏变形,防护层3首先受到冲击作用,防护层3处的层状的碳纤维热塑性与树脂基复合材料与核心层2处的晶格点阵结构经过热固化与铆接连为一体,在传递的冲击力作用下,处于核心层2的晶格点阵结构受压变形,从而吸收绝大多数冲击带来的破坏能量,少数残余冲击能量由内缓层1吸收,进而保障潜艇内部结构不被继续破坏;在承受冲击过后,利用主控潜艇控制受损程度较轻的无人潜艇远离战场,在战场后方上浮出水面,利用潜艇内导热丝14产生的热量传导至核心层2处的单元组件外壳9中的晶格点阵结构处,当温度升高至记忆温度Af,如图2所示,此时NiTi形状记忆合金中的马氏体相完全转变为了奥氏体相,核心层2处的晶格点阵结构得以回复变形,随着晶格点阵单元在核心层2处的回复变形,带动着防护层3和内缓层1向外延伸,最终无人潜艇的耐压外壳体会如图11(b)所示部分回复变形,保障潜艇基本功能得以继续使用,且热激励过程耗时不超过1h,相较传统返回基地进行修复的过程,缩短了维修周期,提高了执行任务效率。
Claims (1)
1.一种可形状回复的减振潜艇耐压外壳制备方法,所述减振潜艇耐压外壳包括:潜艇骨架和耐压外壳体,耐压外壳体由内至外分别为内缓层(1)、核心层(2)和防护层(3),潜艇骨架通过环氧树脂连接在内缓层(1)的内表面上,非耐压壳体(11)通过焊接与耐压外壳体的防护层(3)外侧相连接,当耐压外壳体受到冲击时,主要由防护层(3)和核心层(2)承力,内缓层(1)则吸收核心层(2)传递下来的剩余缓冲力;
防护层(3)与内缓层(1)的材料都是层状的碳纤维热塑性与树脂基复合材料;
核心层(2)为多个单元组件拼接而成,单元组件包括单元组件外壳(9)、设置在单元组件外壳(9)内部的晶格点阵结构,单元组件外壳(9)和晶格点阵结构材料为NiTi形状记忆合金;
内缓层(1)中均匀嵌入若干组独立的导热丝(14),潜艇内部设置的电源通过遥控开关与若干组独立的导热丝(14)连通,导热丝(14)为单元组件外壳(9)内的晶格点阵结构提供热量使其达到记忆回复温度,若干组独立的导热丝(14)在内缓层(1)中分区域独立运行;
所述的晶格点阵结构为双箭尾型-0型结构阵列;
所述的双箭尾型-0型结构阵列的设计方法为:首先,通过宽度参数g与高度参数h设计出基础对称双箭头薄壁模型,其中设计四个半径为r1的弧形肋条替代直肋,同时内部添加两个半径为r2的弧形梁稳固支撑,基于此部分单元体进行优化,为其上下两部分添加横梁与直梁用以支撑稳定变形,得到双箭尾型-0型结构,将双箭尾型-0型结构沿着宽度方向和高度方向线性阵列后形成双箭尾型-0型结构阵列,四个弧形肋条位置处能相互耦合拼接以稳固变形,将其填充入单元组件外壳(9)内部;
所述的减振潜艇耐压外壳制备方法,包括以下步骤:
步骤一,制备防护层(3)与内缓层(1);防护层(3)的制备方法为:将下石墨烯垫板(7)平放在下固定模具(5)上,把碳纤维预浸布(8)逐层放置在下石墨烯垫板(7)上,上石墨烯垫板(6)放置在碳纤维预浸布(8)上,上固定模具(4)平放在上石墨烯垫板(6)上,利用支架固定上石墨烯垫板(6)、下石墨烯垫板(7)与碳纤维预浸布(8),调整上固定模具(4)与下固定模具(5)成型面至目标形状,使上固定模具(4)向下运动,对于支架上的上石墨烯垫板(6)施加压力,同时,下固定模具(5)向上运动,当上固定模具(4)与下固定模具(5)合模以后,在压力作用下碳纤维预浸布(8)得到符合目标形状的预成型件,保持上固定模具(4)与下固定模具(5)合模状态下,使上石墨烯垫板(6)和下石墨烯垫板(7)内的石墨烯电热膜通电加热,使预成型件固化;
步骤二,通过雾化法处理好NiTi形状记忆合金粉末,利用选择性激光熔融技术依据尺寸排列逐层打印晶格点阵结构,并按照所设计的厚度填充至单元组件外壳(9)内部;
步骤三,利用回填式摩擦点焊、热固化与铆接的方法分别处理核心层(2)、防护层(3)以及内缓层(1),完成耐压外壳体的连接;其中热固化与铆接方法为:将单元组件外壳(9)嵌入层状的碳纤维热塑性与树脂基复合材料中;再加热层状的碳纤维热塑性与树脂基复合材料,层状的碳纤维热塑性与树脂基复合材料中的树脂基受热熔化,在压力作用下凝固,从而在单元组件外壳(9)和层状的碳纤维热塑性与树脂基复合材料之间形成粘附力;对层状的碳纤维热塑性与树脂基复合材料与单元组件外壳(9)进行铆接,提高其连接强度;
步骤四,利用等离子喷涂机在防护层(3)处喷涂超声波电磁干扰屏蔽涂层:纳米银颗粒经等离子焰流加热至熔融状态,再经高速气流加压使其雾化,最后通过喷枪喷射至防护层(3)外部,同时,引入碳纳米管CNTs作为增强相,以同样的方法在纳米银的区域上进行喷射,形成等梯度的Ag/CNTs复合涂层,作为超声波电磁干扰屏蔽涂层。
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CN116765425A (zh) * | 2023-08-21 | 2023-09-19 | 吉林大学 | 一种医用植入异质金属复合结构的制备方法 |
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