CN110065273B - 一种填充磁流变阻尼复合材料的夹层波纹减振结构 - Google Patents
一种填充磁流变阻尼复合材料的夹层波纹减振结构 Download PDFInfo
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Abstract
本发明公开一种填充磁流变阻尼复合材料的夹层波纹减振结构,设有外圆柱壳、内圆柱壳,在外圆柱壳与内圆柱壳之间设有复合材料波纹夹层,所述复合材料波纹夹层设有多个斜边,每两个斜边与外圆柱壳、内圆柱壳共同组成梯形折线,所述梯形折线以内圆柱壳的圆心为中心圆周阵列在内圆柱壳的外圆上,所述梯形折线包括磁流变阻尼材料单元,所述磁流变阻尼材料单元设置在两个斜边的下端部之间,所述磁流变阻尼材料单元还设置在两个斜边的上端部之间,本发明的优点是:梯形斜面可用于吸收冲击力,作支撑结构,磁流变阻尼材料单元起缓冲作用,可以实现阻尼性能的无极主动控制。
Description
技术领域
本发明属于机械领域,具体说是一种波纹夹层减振结构,更具体说是一种复合材料波纹夹层减振结构。
背景技术
纤维增强复合材料具有比强度高、比模量高、耐腐蚀性好、温度稳定性好等一系列优点,广泛应用于航空、航天、机械、船舶、体育器械、电气设备、医学、兵器工业与化学工业等领域。工程实际中存在大量通过该类型材料制成的典型薄壳结构件,如航空发动机的复合材料机匣、海底深潜器用的复合材料耐压圆柱壳、液体火箭发动机燃烧室采用的耐高温复合材料壳体等。随着它们的结构越来越复杂、工作环境越来越苛刻,其振动响应问题也越来越突出,由于振动响应超标而引发的碰撞、摩擦等问题也越来越受到人们的关注。
磁流变液是一种新型智能流体材料,在外加磁场作用时,具有阻尼无极可调、能耗低等突出优点。磁流变弹性体是磁流变液的固体模拟,克服了其易沉降、稳定性差的缺点,是一种集磁流变液和弹性体于一体的一种新型智能材料。长期以来,人们对磁流变液、磁流变弹性体等进行了大量研究,并取得了阶段性的研究成果,目前已被广泛应用于振动控制领域。例如,哈尔滨工业大学欧进萍院士等将磁流变阻尼器成功应用于渤海JZ20-2MUQ平台结构的减振;香港理工大学段元峰等将所设计的磁流变阻尼器应用于索承结构中斜拉索的减振;Sharkman研制了使用磁流变液的剪切式旋转阻尼器(吸振器)并将其应用于汽车悬架阻尼主动控制系统实现减振;YALCINTAS等基于能量法研究了磁流变液芯层与弹性材料所组成的自适应磁流变液夹层简支梁的动力特性,并对不同外加磁场作用下的简直夹层梁进行了实验测试。然而,将磁流变材料应用于复合材料及其层合结构的振动主动控制领域的研究还不多见。
在复合材料波纹夹层圆柱壳结构中,目前,还没有出现将磁流变液这种阻尼可控材料加入到波纹夹层结构中的设计。例如,如专利CN201710354091.2和专利CN201510172294.0,分别使用了不同的构想,设计了相关模具,其能成功制备金属波纹夹层圆柱壳和复合材料波纹夹层圆柱壳,但波纹圆柱壳的结构简单,功能单一,而未实现对阻尼性能的主动控制。
阻尼作为复合材料及其结构动力学性能的一项重要指标,在振动、冲击、噪声控制中的地位十分重要。若能够将可主动控制的磁流变阻尼材料填充到复合材料圆柱壳的波纹夹层中去,且实现对波纹夹层的批量化生产和制备,则可极大地提升复合材料圆柱壳系统的抗振性和稳定性,这对于复合材料圆柱壳的生产、制造、工程应用和耐久性具有十分重要的意义。
发明内容
为解决上述技术问题,本发明提供一种具有高模块化,可实现对阻尼的无极主动控制的发明,具体技术方案如下:
一种填充磁流变阻尼复合材料的夹层波纹减振结构,设有外圆柱壳、内圆柱壳,在外圆柱壳与内圆柱壳之间设有复合材料波纹夹层,所述复合材料波纹夹层为由多个梯形折线所组成的环状,梯形折线的上底胶粘在内圆柱壳的外圆上,梯形折线的下底胶粘在外圆柱壳的内圆上;梯形折线的上底和/或下底均沿内圆柱壳的轴向设置磁流变阻尼材料单元,所述磁流变阻尼材料单元与复合材料波纹夹层复合为一体;所述磁流变阻尼材料单元。
所述磁流变阻尼材料单元包括密封管,所述密封管内设有磁流变液,在密封管的圆周外侧还设有线圈,硬支撑管套接在设有线圈的密封管上。
每个所述的下底设有X个磁流变阻尼材料单元,每个所述的上底设有Y个磁流变阻尼材料单元,且X的数量要大于Y的数量,由于外圆柱壳比内圆柱壳的面积更大,且较多的X数量易于发挥多个磁流变阻尼材料单元的阻尼控制效果。
所述复合材料波纹夹层根据不同的使用要求选用不同的材料作为波纹夹层,例如碳纤维波纹夹层、玻璃纤维波纹夹层、芳纶纤维波纹夹层。
本发明进一步公开了一种制造所述的填充磁流变阻尼复合材料的夹层波纹减振结构的方法,包括以下步骤:
步骤1:制备磁流变阻尼材料单元,将磁流变液注入塑料中压成封闭管;然后在封闭管外缠绕铜线圈以提供大小可控的电磁场,线圈两端尽头各引出一根;最后在外层套上一根带有内涂覆绝缘层的铝合金支撑管以发挥防护及屏蔽作用,从而制成了电磁场大小可控的磁流变阻尼材料单元,并且将磁流变阻尼材料单元以标准件制备;
步骤2:制作填充磁流变阻尼材料单元的复合材料波纹夹层,将模具预热至60℃,在波纹夹层模具的模具中柱上先安装好内侧条,涂上脱模剂,铺设复合材料预浸料,在内侧条的上端部和下端部、外侧条的中空腔的上端和下端埋入上述步骤制作好的磁流变阻尼材料单元,再铺设复合材料预浸料,所述的复合材料预浸料将填充磁流变阻尼材料单元包裹在中心位置,用螺栓固定,安装好,再安装外侧条,外侧条用螺栓固定,最后两个安装外壳将包括内侧条、外侧条的模具中柱合夹在一起,用夹紧螺栓螺接在安装外壳上的吊耳上;
步骤3:将安装好的波纹夹层模具放入热压罐中,用120℃加热150分钟后,随炉冷却至室温后拆开外壳,拆开外侧条,由于步骤2模具上涂抹了脱模剂,轻敲便可脱模,得到已填充磁流变阻尼材料单元的复合材料波纹夹层;
步骤4:将外圆柱壳、内圆柱壳与复合材料波纹夹层胶粘在一起,形成填充磁流变阻尼复合材料的夹层波纹圆柱壳;
步骤5:将每个磁流变阻尼材料单元的上下端导线分别通过导电铜线并联焊接起来汇聚成一根总成,即,正极一根,负极一根。
步骤6:在整体壳结构上贴附加速度传感器,将其感知的振动信号传至PLC,若振动幅度超过PLC所设定的极限值,则PLC系统接通铜导线电路,缓慢增大电流。螺旋结构的电流会在磁流变阻尼材料单元内部产生均匀的磁场,达到提升波纹夹层的阻尼性能的目的,最终使得振动幅度小于极限值。若仍未达到理想的减振效果,则持续输入最大电流,使波纹夹层的阻尼达到可控范围内的最大值,将振动控制在可以接受的范围内。
本发明的优点是:梯形斜面可用于吸收冲击力,作支撑结构,磁流变阻尼材料单元起缓冲作用,可以实现阻尼性能的无极级主动控制。
附图说明
图1为本发明整体结构示意图;
图2为磁流变阻尼材料单元的结构示意图;
图3为制造复合材料波纹夹层模具的结构示意图;
图4为外侧条的结构示意图。
具体实施方式
下面结合附图进一步说明本发明,如图1、图2、图3所示,一种填充磁流变阻尼复合材料的夹层波纹减振结构,设有外圆柱壳2、内圆柱壳1,在外圆柱壳2与内圆柱壳1之间设有复合材料波纹夹层3,所述复合材料波纹夹层3为由多个梯形折线5所组成的环状,梯形折线的上底32胶粘在内圆柱壳1的外圆上,梯形折线的下底31胶粘在外圆柱壳2的内圆上;每个梯形折线5的上底和/或下底均沿内圆柱壳1的轴向设置磁流变阻尼材料单元6,所述磁流变阻尼材料单元6与复合材料波纹夹层3复合为一体。
所述磁流变阻尼材料单元6包括密封管601,所述密封管内设有磁流变液602,在密封管601的圆周外侧还设有线圈603,硬支撑管604套接在设有线圈的密封管601上。
每两个斜边4的上端部之间设有五个磁流变阻尼材料单元6,每两个斜边4的下端部之间设有三个磁流变阻尼材料单元6。
所述的磁流变阻尼材料单元的数量并不局限于上述具体数值,每个所述的下底设有X个磁流变阻尼材料单元,X=1,2,3......,每个所述的上底设有Y个磁流变阻尼材料单元,Y=1,2,3......,且X的数量要大于Y的数量,由于外圆柱壳比内圆柱壳的面积更大,且较多的X数量易于发挥多个磁流变阻尼材料单元的阻尼控制效果。
所述复合材料波纹夹层可以在不同的使用条件下可选用不同的材料作为波纹夹层,例如碳纤维波纹夹层、橡胶波纹夹层。
本发明还提供一种制造复合材料波纹夹层的模具,设有波纹夹层模具7,所述波纹夹层模具7包括模具中柱8,所述模具中柱为圆形8,模具中柱8的圆周外侧的上端部设有螺纹孔9,模具中柱8外侧的内侧条10、外侧条11通过螺栓固定在模具中柱的螺纹孔9上,外侧板的内侧为中空腔;内侧条10、外侧条11的外侧还设有两个安装外壳12,所述安装外壳为半圆形,两个安装外壳12将包括内侧条10、外侧条11的模具中柱8扣合在在一起,夹紧螺栓13螺接在安装外壳上的吊耳1201上,并将两个安装外壳12固定在一起。
制造方法包括以下步骤:
步骤1:制备磁流变阻尼材料单元,将磁流变液注入塑料中压成封闭管601;然后在封闭管601外缠绕线圈603,线圈两端尽头各引出一根;最后在外层套上一根硬支撑管604,从而制成了磁流变阻尼材料单元,并且将磁流变阻尼材料单元大量制备,作为标准件;
步骤2:制作复合材料波纹夹层,在波纹夹层模具的模具中柱8上先安装好内侧条10,铺设复合材料预浸料15,在内侧条10的上端部和下端部、外侧条11的中空腔的上端和下端间埋入上述步骤制作好的磁流变阻尼材料单元,再安装外侧条11,最后两个安装外壳12将包括内侧条10、外侧条11的模具中柱8合在在一起,用夹紧螺栓螺接在安装外壳上的吊耳上;
步骤3:将安装好的波纹夹层模具放入热压罐中,用120℃加热150分钟后,随炉冷却至室温后将模具拆开,得到复合材料波纹夹层,且磁流变阻尼材料单元与复合材料波纹夹层复合成一体;
步骤4:将外圆柱壳、内圆柱壳与复合材料波纹夹层胶粘在一起,形成填充磁流变阻尼复合材料的夹层波纹圆柱壳;
步骤5:将每个磁流变阻尼材料单元的上下端导线分别通过导电铜线并联焊接起来汇聚成一根总成,即,正极一根,负极一根。
Claims (3)
1.一种填充磁流变阻尼复合材料的夹层波纹减振结构,其特征在于:用来实现对阻尼的无极主动控制;设有外圆柱壳、内圆柱壳,在外圆柱壳与内圆柱壳之间设有复合材料波纹夹层,所述复合材料波纹夹层为由多个梯形折线所组成的环状,梯形折线的上底胶粘在内圆柱壳的外圆上,梯形折线的下底胶粘在外圆柱壳的内圆上;梯形折线的上底和/或下底均沿内圆柱壳的轴向设置磁流变阻尼材料单元,所述磁流变阻尼材料单元与复合材料波纹夹层复合为一体;
所述磁流变阻尼材料单元包括密封管,所述密封管内设有磁流变液,在密封管的圆周外侧还设有线圈,硬支撑管套接在设有线圈的密封管上;将每个磁流变阻尼材料单元的上下端导线分别通过导电铜线并联焊接起来汇聚成一根总成,即,正极一根,负极一根;在整体壳结构上贴附加速度传感器,将其感知的振动信号传至PLC,若振动幅度超过PLC所设定的极限值,则PLC系统接通铜导线电路,缓慢增大电流;螺旋结构的电流会在磁流变阻尼材料单元内部产生均匀的磁场,达到提升波纹夹层的阻尼性能的目的,最终使得振动幅度小于极限值;若仍未达到理想的减振效果,则持续输入最大电流,使波纹夹层的阻尼达到可控范围内的最大值,将振动控制在可以接受的范围内。
2.根据权利要求1所述的填充磁流变阻尼复合材料的夹层波纹减振结构,其特征在于:每个所述的下底设有X个磁流变阻尼材料单元,X=1,2,3......,每个所述的上底设有Y个磁流变阻尼材料单元,Y=1,2,3......,且X的数量要大于Y的数量。
3.根据权利要求1所述的填充磁流变阻尼复合材料的夹层波纹减振结构,其特征在于:所述复合材料波纹夹层根据不同的使用要求选用不同的材料作为波纹夹层。
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