**COMSOL模拟：管道SH波压电3维检测技术及其动画展示**,利用Comsol模拟的管道SH波压电三维检测技术：基于16个80kHz压电片PZT-4的轴向裂纹与周向裂纹无损检测动画展示,comso
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**COMSOL模拟：管道SH波压电3维检测技术及其动画展示**,利用Comsol模拟的管道SH波压电三维检测技术：基于16个80kHz压电片PZT-4的轴向裂纹与周向裂纹无损检测动画展示,comsol管道SH波压电3维利用16个80kHz的压电片PZT-4，切向激励，均匀贴在在外径72mm壁厚3mm的钢管外侧面，激励轴向SH导波。动画为管道无缺陷下的声场动图。压电片为自发自收模式，16个压电片的探测信号如图1所示，上中下分别为轴向裂纹，周向裂纹和无裂纹时的波形；在时间轴上，波包分别为始波，(裂纹反射波)，端面反射回波。图3为频散曲线，模型测得速度约3078，与理论值3185较为符合。优势:1.单一模态，没有波型转，无杂波干扰。2.可同时检测周向或者轴向裂纹。内存需求约40G，粗化网格可减少内存需求量。模型编号:23＃(价格为含周 轴向裂纹和不含裂纹，共3个模型)其他:模型都是自己做的，支持定制修改，，讲解视 频录制等，没有教不会的。想要自发他收的信号激励和接收方式，请看21-1＃【注:最近倒卖我这个模型的人越来越多，切勿贪便宜买那些没有后保障的】,关键词 <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90400701/2/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90400701/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">《<span class="ff2">3D<span class="_ _0"> </span><span class="ff3">压电技术在管道无损检测中的应用</span>——COMSOL<span class="_ _0"> </span><span class="ff3">模型与<span class="_ _1"> </span></span>SH<span class="_ _0"> </span><span class="ff3">波压电效应</span></span>》</div><div class="t m0 x1 h2 y2 ff3 fs0 fc0 sc0 ls0 ws0">在繁忙的工业检测场景中<span class="ff4">，</span>我们如何利用先进的科技手段来确保管道的完好无损呢<span class="ff4">？</span>今天<span class="ff4">，</span>让我们从</div><div class="t m0 x1 h2 y3 ff3 fs0 fc0 sc0 ls0 ws0">一种独特的视角<span class="ff4">，</span>探讨一下使用<span class="_ _1"> </span><span class="ff2">16<span class="_ _0"> </span></span>个<span class="_ _1"> </span><span class="ff2">80kHz<span class="_ _0"> </span></span>的<span class="_ _1"> </span><span class="ff2">PZT-4<span class="_ _0"> </span></span>压电片来检测管道的裂纹<span class="ff1">。</span></div><div class="t m0 x1 h2 y4 ff3 fs0 fc0 sc0 ls0 ws0">一<span class="ff1">、</span>压电技术的神奇之处</div><div class="t m0 x1 h2 y5 ff3 fs0 fc0 sc0 ls0 ws0">压电技术<span class="ff4">，</span>一个在现代工业检测中越来越受重视的技术<span class="ff1">。</span>在这次应用中<span class="ff4">，</span>我们使用了<span class="_ _1"> </span><span class="ff2">16<span class="_ _0"> </span></span>个<span class="_ _1"> </span><span class="ff2">PZT-4<span class="_ _0"> </span></span>压</div><div class="t m0 x1 h2 y6 ff3 fs0 fc0 sc0 ls0 ws0">电片<span class="ff4">，</span>这些小而强大的设备能够切向激励<span class="ff4">，</span>均匀地贴在外径<span class="_ _1"> </span><span class="ff2">72mm<span class="ff1">、</span></span>壁厚<span class="_ _1"> </span><span class="ff2">3mm<span class="_ _0"> </span></span>的钢管外侧面<span class="ff1">。</span>这样的</div><div class="t m0 x1 h2 y7 ff3 fs0 fc0 sc0 ls0 ws0">设计让我们的检测更加精准和全面<span class="ff1">。</span></div><div class="t m0 x1 h2 y8 ff3 fs0 fc0 sc0 ls0 ws0">二<span class="ff1">、</span>声场动图下的管道</div><div class="t m0 x1 h2 y9 ff3 fs0 fc0 sc0 ls0 ws0">在动画中<span class="ff4">，</span>我们看到了一个无缺陷的管道声场动图<span class="ff1">。</span>这个动图就像是管道的一个<span class="ff2">“</span>心电图<span class="ff2">”<span class="ff4">，</span></span>它以可视</div><div class="t m0 x1 h2 ya ff3 fs0 fc0 sc0 ls0 ws0">化的方式向我们展示了管道内部的状况<span class="ff1">。</span></div><div class="t m0 x1 h2 yb ff3 fs0 fc0 sc0 ls0 ws0">三<span class="ff1">、</span>自发自收模式的压电片</div><div class="t m0 x1 h2 yc ff3 fs0 fc0 sc0 ls0 ws0">压电片采用的是自发自收模式<span class="ff4">，</span>即每一个压电片既负责发出信号也负责接收信号<span class="ff1">。</span>探测信号如图<span class="_ _1"> </span><span class="ff2">1<span class="_ _0"> </span></span>所</div><div class="t m0 x1 h2 yd ff3 fs0 fc0 sc0 ls0 ws0">示<span class="ff4">，</span>上中下分别对应了轴向裂纹<span class="ff1">、</span>周向裂纹和无裂纹时的波形<span class="ff1">。</span>在时间轴上<span class="ff4">，</span>我们可以清晰地看到波</div><div class="t m0 x1 h2 ye ff3 fs0 fc0 sc0 ls0 ws0">包从始波到裂纹反射波<span class="ff4">，</span>再到端面反射回波的整个过程<span class="ff1">。</span></div><div class="t m0 x1 h2 yf ff3 fs0 fc0 sc0 ls0 ws0">四<span class="ff1">、<span class="ff2">COMSOL<span class="_ _0"> </span></span></span>模型与频散曲线</div><div class="t m0 x1 h2 y10 ff3 fs0 fc0 sc0 ls0 ws0">这里<span class="ff4">，</span>我们引入了<span class="_ _1"> </span><span class="ff2">COMSOL<span class="_ _0"> </span></span>这个强大的仿真工具<span class="ff1">。</span>通过这个模型<span class="ff4">，</span>我们可以模拟出管道中的<span class="_ _1"> </span><span class="ff2">SH<span class="_ _0"> </span></span>导波</div><div class="t m0 x1 h2 y11 ff4 fs0 fc0 sc0 ls0 ws0">，<span class="ff3">并且测得其速度约<span class="_ _1"> </span><span class="ff2">3078<span class="ff1">。</span></span>同时</span>，<span class="ff3">我们也得到了频散曲线</span>（<span class="ff3">如图<span class="_ _1"> </span><span class="ff2">3<span class="_ _0"> </span></span>所示</span>），<span class="ff3">它与理论值<span class="_ _1"> </span><span class="ff2">3185<span class="_ _0"> </span></span>非常</span></div><div class="t m0 x1 h2 y12 ff3 fs0 fc0 sc0 ls0 ws0">接近<span class="ff4">，</span>证明了我们的模型和方法的准确性<span class="ff1">。</span></div><div class="t m0 x1 h2 y13 ff3 fs0 fc0 sc0 ls0 ws0">五<span class="ff1">、</span>优势与挑战</div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff3">单一模态<span class="ff4">：</span>我们的方法只产生一种类型的波<span class="ff4">，</span>没有波型转换<span class="ff4">，</span>因此没有杂波干扰<span class="ff1">。</span>这使得我们的</span></div><div class="t m0 x2 h2 y15 ff3 fs0 fc0 sc0 ls0 ws0">检测结果更加准确和可靠<span class="ff1">。</span></div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff3">全面检测<span class="ff4">：</span>我们的方法不仅可以检测轴向裂纹<span class="ff4">，</span>还可以检测周向裂纹<span class="ff1">。</span>这大大提高了我们的工作</span></div><div class="t m0 x2 h2 y17 ff3 fs0 fc0 sc0 ls0 ws0">效率和检测的全面性<span class="ff1">。</span></div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">3.<span class="_ _2"> </span><span class="ff3">内存需求<span class="ff4">：</span>虽然这种方法需要一定的内存支持<span class="ff4">（</span>约<span class="_ _1"> </span></span>40G<span class="ff4">），<span class="ff3">但通过粗化网格的方式</span>，<span class="ff3">我们可以有</span></span></div><div class="t m0 x2 h2 y19 ff3 fs0 fc0 sc0 ls0 ws0">效地减少内存需求量<span class="ff1">。</span></div><div class="t m0 x1 h2 y1a ff3 fs0 fc0 sc0 ls0 ws0">六<span class="ff1">、</span>定制模型与服务</div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>