【摘要】：為了對(duì)鋸切噪聲進(jìn)行定量預(yù)估及聲場(chǎng)分布規(guī)律的研究,提出建立聲場(chǎng)、結(jié)構(gòu)、流體多物理耦合模型。利用顯式的中心差分算法提取了流固耦合(Fluid Structure Interaction,FSI)作用下多體動(dòng)態(tài)接觸時(shí)系統(tǒng)的振動(dòng)響應(yīng);基于邊界元法-有限元分析建模法搭建了切割系統(tǒng)聲學(xué)模型,將系統(tǒng)振動(dòng)響應(yīng)作為聲學(xué)邊界,對(duì)聲場(chǎng)輻射進(jìn)行計(jì)算分析。研究了切割系統(tǒng)在半空間環(huán)境的聲場(chǎng)時(shí)域、頻域輻射特性;分析了結(jié)構(gòu)與流體間的單、雙向耦合對(duì)聲場(chǎng)的影響;通過計(jì)算輻射面積對(duì)聲功率的影響明確了噪聲主要輻射區(qū)域。從現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)與數(shù)值結(jié)果的比較可見,多場(chǎng)耦合分析在切割噪聲輻射水平分析及預(yù)估方法是正確可行的。
[Abstract]:In order to study the quantitative prediction of sawing noise and the distribution of sound field, a multi-physical coupling model of sound field, structure and fluid is proposed. The vibration response of the multi-body dynamic contact system under fluid-solid coupled (Fluid Structure Interaction,FSI is extracted by using the explicit central difference algorithm. Based on the boundary element method (BEM) and finite element method (FEM), the acoustic model of the cutting system is built. The acoustic response of the system is taken as the acoustic boundary, and the acoustic field radiation is calculated and analyzed. In this paper, the time-domain and frequency-domain radiation characteristics of the cutting system in the half-space environment are studied, the influence of the single and bidirectional coupling between the structure and the fluid on the acoustic field is analyzed, and the main radiation region of the noise is determined by calculating the effect of the radiation area on the acoustic power. From the comparison of the field measured data and the numerical results, it can be seen that the multi-field coupling analysis is correct and feasible in the analysis and prediction of the radiation level of the cutting noise.
【作者單位】： 河北工業(yè)大學(xué)機(jī)械工程學(xué)院;
【基金】：天津市自然科學(xué)基金重點(diǎn)項(xiàng)目(11JCZDJC23100) 河北省自然科學(xué)基金(E2011202114)資助~~
【分類號(hào)】：TB53

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本文編號(hào)：2365830