基于多场耦合的锯片切割系统声辐射特性研究
发布时间：2018-12-06 09:34
【摘要】：为了对锯切噪声进行定量预估及声场分布规律的研究,提出建立声场、结构、流体多物理耦合模型。利用显式的中心差分算法提取了流固耦合(Fluid Structure Interaction,FSI)作用下多体动态接触时系统的振动响应;基于边界元法-有限元分析建模法搭建了切割系统声学模型,将系统振动响应作为声学边界,对声场辐射进行计算分析。研究了切割系统在半空间环境的声场时域、频域辐射特性;分析了结构与流体间的单、双向耦合对声场的影响;通过计算辐射面积对声功率的影响明确了噪声主要辐射区域。从现场实测数据与数值结果的比较可见,多场耦合分析在切割噪声辐射水平分析及预估方法是正确可行的。
[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.
【作者单位】： 河北工业大学机械工程学院;
【基金】：天津市自然科学基金重点项目(11JCZDJC23100) 河北省自然科学基金(E2011202114)资助~~
【分类号】：TB53
[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.
【作者单位】： 河北工业大学机械工程学院;
【基金】：天津市自然科学基金重点项目(11JCZDJC23100) 河北省自然科学基金(E2011202114)资助~~
【分类号】：TB53
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