本文主要研究内容
作者刘哲明（2019）在《多尺度高效吸声穿孔板结构优化及制造工艺研究》一文中研究指出：微穿孔板吸声结构具有低污染、结构强度高、耐腐蚀性强等优点,广泛应用于建筑、汽车、潜艇、飞机等众多领域,是现今应用范围最广的吸声降噪结构之一。但由于其吸声带宽较窄,在低频段吸声效果差,且板后空腔的存在导致需要的空间较大,限制了其实际应用范围。因此,如何在不增大微穿孔板结构体积的前提下,增大其吸声频带宽度,提高其低频段吸声性能是目前研究的热点。首先通过实验探究了油泥耦合穿孔板结构的吸声性能。常温条件下,在金属冲孔板内加入油泥材料,制造不同结构参数的油泥耦合微穿孔板,使用阻抗管传递函数法测试其吸声系数,并与传统机械加工微穿孔板进行对比。结果发现,油泥耦合微穿孔板在孔径较大与穿孔率较大的参数条件下,其吸声系数曲线向低频方向移动;当孔径或穿孔率过小时,油泥耦合微穿孔板与常规微穿孔板性能无较大差别。油泥对温度比较敏感,在50℃时开始软化,在60℃以上不能附着在冲孔板上,因此油泥耦合微穿孔板不适用于高温环境下工作的机动车尾气消声器等吸声结构。理想刚性微穿孔板的理论吸声性能由其结构参数决定,主要的结构参数有穿孔率、穿孔直径、板后空腔深度和穿孔板厚度。通过MATLAB数值仿真研究各结构参数对微穿孔板吸声性能的影响,并制备了相同结构参数的油泥耦合微穿孔板,与数值计算结果进行对比。结果发现,油泥耦合微穿孔板的各参数对其吸声性能的影响规律、吸声性能的变化趋势与理想刚性微穿孔板基本一致,但吸收性能有较大提高。分析认为,板后空腔深度能独立明确地影响微穿孔板吸声性能,穿孔率、穿孔直径、穿孔板厚度不能单独对穿孔板吸声性能产生明确的影响。提出了两种制造简单且成本低廉的提高微穿孔板吸声性能的新方法。经试验验证,改变微穿孔板的微孔分布,对微穿孔板的吸声性能有着较大影响。穿孔肋板耦合微穿孔板可以类比为双层穿孔板,其吸声系数曲线的第一个波峰会向低频移动,表明其低频吸声性能有一定提高。第二个波峰与单层微穿孔板吸声系数曲线峰值一致,吸声带宽会有较大幅度缩减。试验结果证明了理论分析的正确性。
Abstract
wei chuan kong ban xi sheng jie gou ju you di wu ran 、jie gou jiang du gao 、nai fu shi xing jiang deng you dian ,an fan ying yong yu jian zhu 、qi che 、qian ting 、fei ji deng zhong duo ling yu ,shi xian jin ying yong fan wei zui an de xi sheng jiang zao jie gou zhi yi 。dan you yu ji xi sheng dai kuan jiao zhai ,zai di pin duan xi sheng xiao guo cha ,ju ban hou kong qiang de cun zai dao zhi xu yao de kong jian jiao da ,xian zhi le ji shi ji ying yong fan wei 。yin ci ,ru he zai bu zeng da wei chuan kong ban jie gou ti ji de qian di xia ,zeng da ji xi sheng pin dai kuan du ,di gao ji di pin duan xi sheng xing neng shi mu qian yan jiu de re dian 。shou xian tong guo shi yan tan jiu le you ni ou ge chuan kong ban jie gou de xi sheng xing neng 。chang wen tiao jian xia ,zai jin shu chong kong ban nei jia ru you ni cai liao ,zhi zao bu tong jie gou can shu de you ni ou ge wei chuan kong ban ,shi yong zu kang guan chuan di han shu fa ce shi ji xi sheng ji shu ,bing yu chuan tong ji xie jia gong wei chuan kong ban jin hang dui bi 。jie guo fa xian ,you ni ou ge wei chuan kong ban zai kong jing jiao da yu chuan kong lv jiao da de can shu tiao jian xia ,ji xi sheng ji shu qu xian xiang di pin fang xiang yi dong ;dang kong jing huo chuan kong lv guo xiao shi ,you ni ou ge wei chuan kong ban yu chang gui wei chuan kong ban xing neng mo jiao da cha bie 。you ni dui wen du bi jiao min gan ,zai 50℃shi kai shi ruan hua ,zai 60℃yi shang bu neng fu zhao zai chong kong ban shang ,yin ci you ni ou ge wei chuan kong ban bu kuo yong yu gao wen huan jing xia gong zuo de ji dong che wei qi xiao sheng qi deng xi sheng jie gou 。li xiang gang xing wei chuan kong ban de li lun xi sheng xing neng you ji jie gou can shu jue ding ,zhu yao de jie gou can shu you chuan kong lv 、chuan kong zhi jing 、ban hou kong qiang shen du he chuan kong ban hou du 。tong guo MATLABshu zhi fang zhen yan jiu ge jie gou can shu dui wei chuan kong ban xi sheng xing neng de ying xiang ,bing zhi bei le xiang tong jie gou can shu de you ni ou ge wei chuan kong ban ,yu shu zhi ji suan jie guo jin hang dui bi 。jie guo fa xian ,you ni ou ge wei chuan kong ban de ge can shu dui ji xi sheng xing neng de ying xiang gui lv 、xi sheng xing neng de bian hua qu shi yu li xiang gang xing wei chuan kong ban ji ben yi zhi ,dan xi shou xing neng you jiao da di gao 。fen xi ren wei ,ban hou kong qiang shen du neng du li ming que de ying xiang wei chuan kong ban xi sheng xing neng ,chuan kong lv 、chuan kong zhi jing 、chuan kong ban hou du bu neng chan du dui chuan kong ban xi sheng xing neng chan sheng ming que de ying xiang 。di chu le liang chong zhi zao jian chan ju cheng ben di lian de di gao wei chuan kong ban xi sheng xing neng de xin fang fa 。jing shi yan yan zheng ,gai bian wei chuan kong ban de wei kong fen bu ,dui wei chuan kong ban de xi sheng xing neng you zhao jiao da ying xiang 。chuan kong le ban ou ge wei chuan kong ban ke yi lei bi wei shuang ceng chuan kong ban ,ji xi sheng ji shu qu xian de di yi ge bo feng hui xiang di pin yi dong ,biao ming ji di pin xi sheng xing neng you yi ding di gao 。di er ge bo feng yu chan ceng wei chuan kong ban xi sheng ji shu qu xian feng zhi yi zhi ,xi sheng dai kuan hui you jiao da fu du su jian 。shi yan jie guo zheng ming le li lun fen xi de zheng que xing 。
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论文作者分别是来自长春理工大学的刘哲明，发表于刊物长春理工大学2019-10-23论文，是一篇关于微穿孔板论文,传递函数法论文,结构参数论文,微孔分布论文,吸声带宽论文,长春理工大学2019-10-23论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自长春理工大学2019-10-23论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：微穿孔板论文; 传递函数法论文; 结构参数论文; 微孔分布论文; 吸声带宽论文; 长春理工大学2019-10-23论文;