CAJ | 학술논문

文章运用ANSYS11.0建立了SiCp/Al复合材料薄壁回转体的三维实体模型,并进行了模态分析.通过模态叠加法在工件的自由一端、离自由一端1/3工件长度、离自由一端2/3工件长度处施加不同简谐激振力进行谐响应分析获得了振幅频率曲线,确定了0~5000 Hz的共振频率点及应避开的频率范围.结果表明:SiCp/Al复合材料薄壁圆柱壳各阶固有频率均较高,第1、3、5阶振型均为整体振动,第7阶振型为扭振,第9阶振型整体表现为弯曲振动;随着对SiCp/Al复合材料薄壁回转体简谐激振力增大,其振动振幅也随着增大;而工件几何尺寸对固有频率影响较大.其分析结果可以为在薄壁回转体加工中,合理选择铣刀转速和齿数,可使切削力频率避开共振区间,有利于得到更好的表面质量.
문장운용ANSYS11.0건립료SiCp/Al복합재료박벽회전체적삼유실체모형,병진행료모태분석.통과모태첩가법재공건적자유일단、리자유일단1/3공건장도、리자유일단2/3공건장도처시가불동간해격진력진행해향응분석획득료진폭빈솔곡선,학정료0~5000 Hz적공진빈솔점급응피개적빈솔범위.결과표명:SiCp/Al복합재료박벽원주각각계고유빈솔균교고,제1、3、5계진형균위정체진동,제7계진형위뉴진,제9계진형정체표현위만곡진동;수착대SiCp/Al복합재료박벽회전체간해격진력증대,기진동진폭야수착증대;이공건궤하척촌대고유빈솔영향교대.기분석결과가이위재박벽회전체가공중,합리선택선도전속화치수,가사절삭력빈솔피개공진구간,유리우득도경호적표면질량.
This paper uses ANSYS11.0 built up three-dimensional entity mode and modal analysis is about rotary thin-walled part of SiCp/Al composites.Through using modal superposition method and applying dif-ferent harmonic exciting force at the free end of the workpiece,a third of the workpiece length from free end,two-thirds of artifacts from the free end length ,for harmonic response analysis to obtain the amplitude frequency curve,so that it can determine the resonance of 0 ~ 5000 Hz frequency point and avoided of the frequency range.The result shows that the inherent frequencies of rotary thin-walled part of SiCp/Al com-posites are very high,the overall vibration model shapes occurs in 1th、3th、5th model shapes ,the tensional vibration model shapes occurs in 7th model shapes and 9th overall performance for the first mode shape ben-ding vibration;As the SiCp/Al thin-walled composite rotary radial wave power increases,the vibration am-plitude increases;The influence of centrifugal force to workpiece geometry size has great influent on it.It is shown that cutting force can avoid resonance frequency range by reasonable choice on cutter rotate speed and tooth number,it is propitious to obtaining better surface quality.