1、根据场量分布要求,求取场源。根据电磁装置设定的场量值及其有关的特性的要求,求解该装置的的结构、尺寸、媒质性能参数和激励参数等。2 设计一个高压点火器,用分析其电场分布,说明影响点火器起火的主要参数,并说明怎样改变参数可以容易地点火?建立模型如图选择两个尖端为路径,电位图和电场强度图如下图所示程序如下:/BATCH /COM,ANSYS RELEASE 12.0.1 UP 21:32:18 01/14/2016/input,menust,tmp,1 /GRA,POWER/GST,ON/PLO,INFO,3/GRO,CURL,ON/CPLANE,1 /REPLOT,RESIZE WPSTYLE,0
2、/FILNAME,T2,0 /PREP7 !* /NOPR /PMETH,OFF,1KEYW,PR_SET,1 KEYW,PR_STRUC,0 KEYW,PR_THERM,0 KEYW,PR_FLUID,0 KEYW,PR_ELMAG,1 KEYW,MAGNOD,0 KEYW,MAGEDG,0 KEYW,MAGHFE,0 KEYW,MAGELC,1 KEYW,PR_MULTI,0 KEYW,PR_CFD,0 /GO /COM, /COM,Preferences for GUI filtering have been set to display:/COM, Electric ET,1,PLAN
3、E121 MPTEMP, MPTEMP,1,0 MPDATA,PERX,1,1MPDATA,RSVX,1,1e+10FLST,3,1,8 FITEM,3,0,0.1E-02,0 K, ,P51XFITEM,3,-0.1E-02,0.2E-02,0 FITEM,3,-0.1E-02,0.4E-02,0 FITEM,3,-0.3E-02,0.4E-02,0 FITEM,3,-0.3E-02,-0.4E-02,0 FITEM,3,-0.1E-02,-0.4E-02,0 FITEM,3,-0.1E-02,-0.2E-02,0 FITEM,3,0,-0.1E-02,0FITEM,3,0.1E-02,-0
4、.2E-02,0 FITEM,3,0.1E-02,-0.4E-02,0 FITEM,3,0.3E-02,-0.4E-02,0 FITEM,3,0.3E-02,0.4E-02,0 FITEM,3,0.1E-02,0.4E-02,0 FITEM,3,0.1E-02,0.2E-02,0 LSTR, 1, 2 LSTR, 3, 2 LSTR, 4, 3 LSTR, 5, 4 LSTR, 6, 5 LSTR, 7, 8 LSTR, 6, 7 LSTR, 9, 8 LSTR, 10, 11 LSTR, 9, 10 LSTR, 12, 13 LSTR, 12, 11 LSTR, 13, 14 LSTR, 1
5、4, 1 FLST,2,14,4 FITEM,2,4 FITEM,2,3 FITEM,2,2 FITEM,2,1 FITEM,2,6 FITEM,2,7 FITEM,2,5 FITEM,2,10 FITEM,2,9 FITEM,2,8 FITEM,2,12 FITEM,2,11 FITEM,2,13 FITEM,2,14 AL,P51X ALLSEL,ALL CM,_Y,AREA ASEL, , , , 1 CM,_Y1,AREA CMSEL,S,_Y CMSEL,S,_Y1 AATT, 1, , 1, 0, CMDELE,_Y CMDELE,_Y1 SMRT,6 SMRT,1 MSHAPE,
6、0,2D MSHKEY,0CHKMSH,AREA AMESH,_Y1 CMDELE,_Y2 FINISH /SOLANTYPE,0FLST,2,4,4,ORDE,4 FITEM,2,-2 FITEM,2,-14 DL,P51X, ,VOLT,0FLST,2,4,4,ORDE,3 FITEM,2,-8 DL,P51X, ,VOLT,7000 /STATUS,SOLUSOLVE /POST1 /EFACET,1 PLNSOL, VOLT, 0/VSCALE,1,1,0 PLVECT,EF, , , ,VECT,ELEM,ON,0 PATH,1,2,30,20, PPATH,1,0,0,0.001,
7、0,0, PPATH,2,0,0,-0.001,0,0, /PBC,PATH,1 /REPLOT /PBC,PATH,0 PDEF, ,EF,SUM,AVG /PBC,PATH, ,0 PLPATH,EFSUMPLPATH,S /EXIT,ALL(3)分析可得,物体击穿放电主要与材料,形状,所加电压有关。当采用统一击穿物体放电,所加电压相同和相处距离相同时,尖对尖最易击穿放电,尖对板击穿放电次之,板对板最不易放。在形状相同,击穿介质一样时,一般所加电压越高越容易击穿。综上所述:使所加电压的物体之间距离越短,形状越接近尖对尖就越容易放电。同时,选择击穿电压较低的介质也是实现击穿发电的途径。3如图
8、1所示,、,半径以内是金属球,其上电位为,大于半径小于半径之间为第一种电解质(即绝缘体),其相对介电常数为,大于半径小于半径之间为第二种电解质,其相对介电常数,第二种电解质外面是导体层,该导体层接地,试分析当(1)当,(2),两种情况时两种电解质内和的分布,并说明两种情况下和的分布不同的原因。图1(1)程序:/COM,ANSYS RELEASE 12.0.1 UP 11:02:26 01/12/2016/FILNAME,T3,0 MPDATA,RSVX,2,1e+10MPDATA,PERX,2,80 PCIRC,0.08,0.01,0,360, PCIRC,0.12,0.08,0,360, FLST,2,2,5,ORDE,2 AGLUE,P51X ASEL, , , , 3 AATT, 2, , 1, 0, FLST,5,2,5,ORDE,2 FITEM,5,1 FI
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