ansys耦合场-压电梁的模态分析

压电梁的模态分析几何尺寸：梁的长度L1=300mm宽度W=30mm厚度H1=2mm压电片长度L=50mm宽度W=30mm厚度H=1mm采用pzt-5H压电陶瓷片模态分析结果一阶振型（f=23.144Hz）++---箭头为压电陶瓷的极化方向二阶振型(f=137.52Hz)/prep7!PZT-5H材料特性参数mp,DENS,1,7700!密度,kg/m**3mp,perx,1,1700!介电常数mp,pery,1,1700mp,perz,1,1470tb,ANEL,1!弹性劲度系数,N/m^2tbdata,1,12.6E10,7.95E10,8.41E10!c11,c12,c13tbdata,7,12.6E10,8.41E10!c11,c33tbdata,12,11.7E10!c33tbdata,16,2.30E10!c44tbdata,19,2.30E10!c44tbdata,21,2.35E10!c66tb,PIEZ,1!压电（应力）常数,C/m^2tbdata,3,-6.5!e31tbdata,6,-6.5!e31tbdata,9,23.3!e33tbdata,11,17.0!e15tbdata,13,17.0!e15!定义主结构的材料参数mp,dens,2,7800EX,2,209e9nuxy,2,0.3!定义压电复合梁几何模型(L=50mmW=30mmH=1mm)L=50e-3W=30e-3H=1e-3!压电片几何尺寸L1=300e-3H1=2e-3!主结构几何尺寸local,11!建立下层局部坐标+Z方向local,12,,,,,,,180!建立上层局部坐标-Z方向csys,11!激活局部坐标系11+y方向block,0,L1,0,W,O,H1block,0,L,0,W,0,-Hblock,0,L,0,W,H1,H1+Hvglue,all!将梁同压电片粘结et,1,solid5,3!定义压电单元et,2,solid45!定义主结构单元!采用映射划分网格连接相邻面asel,s,loc,z,0cm,CM_1,areacmplot,CM_1accat,CM_1asel,s,loc,z,H1cm,CM_2,areaaccat,CM_2!进行网格划分LESIZE,ALL,5e-3,,,,1,,,1,mat,1$type,1$esys,11!对下层压电片网格划分Vmesh,4mat,2$type,2$esys,11!对中间结构网格划分Vmesh,6mat,1$type,1$esys,12!对上层压电片网格划分vmesh,5nsel,s,loc,z,-H!定义下层电极cp,1,volt,all*get,n_bot,node,0,num,minnsel,s,loc,z,H+H1!定义上层电极cp,2,volt,all*get,n_top,node,0,num,minnsel,s,loc,z,0!压电片中间面电压耦合nsel,r,loc,x,0,Lcm,CM_3,nodensel,s,loc,z,H1nsel,r,loc,x,0,Lcm,Cm_4,nodecmsel,s,cm_3,nodecmsel,a,cm_4,nodecp,3,volt,allfini/soluantype,modalmodopt,lanb,3mxpand,3nsel,s,loc,x,0d,all,ux,0,,,,uy,uzd,n_top,volt,0!上下层电极短路d,n_bot,volt,0nsel,allsolvefini