CN108248147A - 一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构 - Google Patents
一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构 Download PDFInfo
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Abstract
本发明公开了一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构,包括中间层的泡沫夹芯和上、下面板;泡沫夹芯为镍钛阻尼合金各向同性ISOMAX泡沫结构,它有各向异性的方形壁板结构和三角形金字塔壁板结构组成;上、下面板为镍钛阻尼合金面板。本发明使用的是超材料ISOMAX泡沫结构,它是目前现有的唯一达到多孔材料理论刚度极限的各向同性泡沫结构。与传统金属蜂窝和泡沫结构相比,即使在质量很轻的情况下,依然具备极强的刚度和强度,在剧烈声振激励下,具备很强的抗变形和抗破坏能力。另外,本发明的夹芯结构和上下面板具有优良的耐磨性和耐蚀性,是一种极为合适的被动减振结构材料,仅仅通过自身材料就可以从低频到高频进行宽频段的自适应减振降噪。
Description
技术领域
本发明属于航空航天、船舰和高铁技术领域,具体涉及一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构。
背景技术
金属蜂窝和泡沫夹层板因其轻质、高比强度、高比刚度、隔热、减振和降噪等多功能结构一体化的特点,被广泛用于航空航天飞行器、船舰和高铁等的壁板结构中。现有的技术,对轻质多孔材料夹层板结构的刚度、强度和减振降噪性能的研究,多集中在传统的四变形、六边形蜂窝夹层板以及泡沫夹层板结构中。随着科学技术的快速发展、人民经济和国防事业的需要,航空航天飞行器、船舰和高铁等的速度越来越快,安装的智能设备越来越多,传统的金属蜂窝夹层板和金属泡沫夹层板结构,在满足结构整体质量要求的情况下,其刚度、强度和减振降噪等性能已不能满足结构安全性能的基本要求。因此,研制出具备超轻、超硬、高强、优良自适应减振降噪的高性能面板结构,已成为当务之急。
在减振降噪方面,传统的多孔材料夹层板,多通过在芯层施加外在共振结构或者填充阻尼材料,来进行某些低频段的减振降噪。一方面,施加外在共振结构或者填充阻尼材料,会过多增加质量,因而过多影响或者改变多孔材料夹层板的结构和力学性能。另外,往往只能在某些低频段减振降噪,很难自适应减振降噪。
因此,为了克服传统蜂窝和泡沫夹层板结构存在的质量重和减振降噪性能差的缺点,制备超轻、超硬、高强、优良自适应减振降噪泡沫夹层板结构,已成为航空航天、船舰和高铁等领域的迫切需求。
发明内容
本发明的目的,是克服传统泡沫夹层板质量重、承载差和很难自适应减振降噪的缺点,从结构和镍钛阻尼合金材料两方面出发,为航空航天、船舰和高铁等领域,提供一种超轻、超硬、高强、自适应减振降噪阻尼合金泡沫夹层板结构。
本发明的目的是通过以下技术方案实现的:
一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构,包括中间层的泡沫夹芯和上、下面板;泡沫夹芯为镍钛阻尼合金各向同性ISOMAX泡沫结构,它有各向异性的方形壁板结构和三角形金字塔壁板结构组成;上、下面板为镍钛阻尼合金面板。其中,ISOMAX是夹芯泡沫的名称,它是加州大学圣芭拉分校材料系的科研人员提出的一种超材料各向同性泡沫结构,取名为ISOMAX。
与现有技术相比,本发明的技术方案所带来的有益效果是:
本发明的夹芯结构,使用的是超材料ISOMAX泡沫结构,它是目前现有的唯一达到多孔材料理论刚度极限的各向同性泡沫结构。与传统金属蜂窝和泡沫结构相比,即使在质量很轻的情况下,依然具备极强的刚度和强度,在剧烈声振激励下,具备很强的抗变形和抗破坏能力。另外,本发明的夹芯结构和上下面板,使用的材料是镍钛阻尼合金Ni50Ti50。该阻尼合金是一种孪晶性阻尼合金,具有优异的阻尼性能(比阻尼约为40%),抗拉强度达850Mpa左右,延伸率约为60%,而且具有优良的耐磨性和耐蚀性,是一种极为合适的被动减振结构材料,仅仅通过自身材料就可以从低频到高频进行宽频段的自适应减振降噪。
附图说明
图1是本发明整体结构示意图。
图2是ISOMAX泡沫夹芯结构和上、下面板结构的分离状态示意图。
图3是ISOMAX泡沫结构代表单元示意图。
附图标记:1-ISOMAX泡沫夹芯;2-上面板;3-下面板
具体实施方式
下面结合附图对本发明作进一步的描述。
图1是本发明提出的超轻、超硬、高强自适应减振降噪泡沫夹层板的整体结构示意图,它包括镍钛阻尼合金ISOMAX泡沫夹芯1、上面板2和下面板3(见图2)。图中的金属ISOMAX泡沫夹芯结构、上面板和下面板结构,仅为示例,具体的结构尺寸和ISOMAX泡沫单元数量(参见图3),可以根据实际工程需要适当选取。
记ISOMAX泡沫夹芯的厚度为d,相对密度为ρ/ρs(ρs为构成材料的密度),则组成ISOMAX泡沫结构的方形壁板结构的壁长lc=d/2。同时,记上下面板的厚度为t,组成ISOMAX泡沫结构的方形壁板结构和三角形金字塔壁板结构的壁厚分别为tc和tt。
理论分析表明,ISOMAX泡沫结构的各向同性性能,能通过适当选取各向异性方形壁板的厚度tc与三角形金字塔壁板的厚度tt来确定。这是ISOMAX泡沫夹层板结构超轻、超硬和高强的基础。ISOMAX泡沫夹层板的质量和总体承载性能,可以通过调整ISOMAX泡沫夹芯厚度d、相对密度ρ/ρs和上下面板的厚度t来实现。而ISOMAX泡沫夹层板结构的自适应减振性能,主要通过镍钛阻尼合金Ni50Ti50来实现。该阻尼合金具有优异的阻尼性能(比阻尼约为40%)、形状记忆性能和力学性能(抗拉强度达850Mpa左右,延伸率约为60%),而且温度适用范围广泛,已被地震工程专家成功地用在大厦和大型建筑物的减震装置上。同时,作为一种优良的减振材料,在汽车和机械制造领域也得到了一定的应用。结合ISOMAX泡沫结构的超轻超硬高强性能与Ni50Ti50阻尼合金的从低频到高频的优异被动减振性能以及优良力学性能,镍钛阻尼合金ISOMAX泡沫夹层板能够同时具备超轻、超硬、高强和优良自适应减振降噪的综合性能,在航空航天、船舰和高铁等领域的壁板结构中有着广泛的应用前景。
本发明的制备方法如下:
通过3D打印Ni50Ti50镍钛基阻尼合金ISOMAX泡沫夹层板结构,也即所需的超轻、超硬、高强、自适应减振降噪的镍钛阻尼合金ISOMAX泡沫夹层板结构。
本发明并不限于上文描述的实施方式。以上对具体实施方式的描述旨在描述和说明本发明的技术方案,上述的具体实施方式仅仅是示意性的,并不是限制性的。在不脱离本发明宗旨和权利要求所保护的范围情况下,本领域的普通技术人员在本发明的启示下还可做出很多形式的具体变换,这些均属于本发明的保护范围之内。
Claims (1)
1.一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构,其特征在于,包括上面板、下面板和位于中间层的泡沫夹芯,所述泡沫夹芯为镍钛阻尼合金各向同性ISOMAX泡沫结构,由各向异性的方形壁板结构和三角形金字塔壁板结构组成;所述上面板和下面板为镍钛阻尼合金面板。
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Citations (4)
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CN101407867A (zh) * | 2008-11-26 | 2009-04-15 | 华南理工大学 | 复合型轻质高强镍钛记忆合金基高阻尼材料制备方法 |
CN102896836A (zh) * | 2012-10-22 | 2013-01-30 | 哈尔滨工程大学 | 一种镍钛记忆合金/聚氨酯复合阻尼板材及其制备方法 |
CN103395230A (zh) * | 2013-07-09 | 2013-11-20 | 哈尔滨工程大学 | 镍钛形状记忆合金蜂窝板及其制备方法 |
CN208052733U (zh) * | 2018-02-27 | 2018-11-06 | 天津大学 | 一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构 |
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CN101407867A (zh) * | 2008-11-26 | 2009-04-15 | 华南理工大学 | 复合型轻质高强镍钛记忆合金基高阻尼材料制备方法 |
CN102896836A (zh) * | 2012-10-22 | 2013-01-30 | 哈尔滨工程大学 | 一种镍钛记忆合金/聚氨酯复合阻尼板材及其制备方法 |
CN103395230A (zh) * | 2013-07-09 | 2013-11-20 | 哈尔滨工程大学 | 镍钛形状记忆合金蜂窝板及其制备方法 |
CN208052733U (zh) * | 2018-02-27 | 2018-11-06 | 天津大学 | 一种自适应减振降噪镍钛阻尼合金泡沫夹层板结构 |
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