基于点云数据的声学边界元分析方法
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摘要
以点云数据作为声学边界元分析的基础数据,把逆向工程与声学边界元数值计算相结合。将扫描获取的不规则的点云网格优化处理为形状规则、满足数值计算的网格单元模型,以用于声学数值计算,实现了CAD几何模型与CAE仿真分析的无缝衔接,提出基于点云数据的声学边界元分析方法。以小型扫路机厢体声传播问题作为具体算例,与传统声学边界元仿真对比,得到了较高的吻合度,证明了该方法的有效性与可行性。
A boundary element method for acoustical problems based on point cloud data was proposed,which combines the reverse engineering with the acoustic boundary element numerical algorithm. The irregular point cloud grid obtained by scanning was optimized to a regular grid element model with well shape,suitable for numerical calculation.The CAD geometrical model was seamlessly connected with the CAE simulation analysis. An example of the acoustic propagation problem for a small suction sweeper van body was given in detail. Comparing the results with those of the traditional acoustic boundary element simulation,the validity and feasibility of the method were proved.
A boundary element method for acoustical problems based on point cloud data was proposed,which combines the reverse engineering with the acoustic boundary element numerical algorithm. The irregular point cloud grid obtained by scanning was optimized to a regular grid element model with well shape,suitable for numerical calculation.The CAD geometrical model was seamlessly connected with the CAE simulation analysis. An example of the acoustic propagation problem for a small suction sweeper van body was given in detail. Comparing the results with those of the traditional acoustic boundary element simulation,the validity and feasibility of the method were proved.
引文
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[3]张俊杰,原春晖,刘彦,等.基于解析解和边界元解的圆柱壳声辐射对比研究[J].振动与冲击,2013,32(4):1-5.ZHANG Junjie,YUAN Chunhui,LIU Yan,et al.The comparative study of sound radiation of cylindrical shell based on analytical solution and boundary element method[J].Journal of Vibration and Shock,2013,32(4):1-5.
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[5]赵岩,江建明,李筱贺,等.中下胸椎肋椎单元三维有限元模型的建立[J].中国组织工程研究,2012,16(22):3996-4000.ZHAO Yan,JIANG Jianming,LI Xiaohe,et al.Establishing three-dimensional finite element model of the rib vertebra unit of the middle and lower thoracic vertebra[J].Chinese Journal of Tissue Engineering Research,2012,16(22):3996-4000.
[6]李筱贺,李志军,李少华,等.CT扫描结合逆向工程软件建立下胸椎三维有限元模型[J].中国组织工程研究与临床康复,2010,14(4):594-597.LI Xiaohe,LI Zhijun,LI Shaohua,et al.Reconstruction of a three-dimensional finite element model of lower thoracic vertebrae using CT in combination with reverse engineering software[J].Chinese Journal of Tissue Engineering Research,2010,14(4):594-597.
[7]CHEN Y H,NG C T,WANG Y Z.Data reduction in integrated reverse engineering and rapid prototyping[J].International Journal of Computer Integrated Manufacturing,1999,12(2):97-103.
[8]曹万秋.基于逆向工程的复杂曲面重构技术的研究[D].沈阳:东北大学,2011.
[9]宋德华.基于柴油发动机缸盖的逆向工程研究[D].郑州:郑州大学,2014.
[10]沈建国,陈志杨,张引,等.面向有限元分析的三角网格迭代优化[J].计算机辅助设计与图形学学报,2009,21(12):1715-1721.SHEN Jianguo,CHEN Zhiyang,ZHANG Yin,et al.Iterative optimization of triangle meshing for FEM analysis[J].Journal of Computer-Aided Design&Computer Graphics,2009,21(12):1715-1721.
[11]ALLIEZ P,VERDIRE R C D,DEVILLERS O,et al.Isotropic surface remeshing[C]∥Shape Modeling International.[S.l.]:IEEE,2003.
[12]BOTSCH M,STEINBERG S,BISCHOFF S,et al.Open Mesh:a generic and efficient polygon mesh data structure[Z].Opensg Symposium,2002.
[13]KOBBELT L.Open Mesh.[EB/OL].(2013-06-03).http://www.openmesh.org.
[14]BOTSCH M,KOBBELT L.A remeshing approach to multiresolution modeling[C]∥Eurographics/acm Siggraph Symposium on Geometry Processing.[S.l.]:DBLP,2004.
[15]CHEN L H,SCHWEIKERT D G.Sound radiation from an arbitrary body[J].Journal of the Acoustical Society of America,1963,35(10):1626-1632.