Tham khảo tài liệu 'engineering analysis with ansys software episode 2 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 184 Chapter 4 Mode analysis IfflSubspace Modal Analysis MO DO PT Mode Extraction Options FREQB Start Freq initial shift 0 FREQE End Frequency 200001 Nrmkey Normalize mode shapes To mass matrix 2 RIGID Known rigid body modes All DOF ux UY uz ROTX ROIY ROTZ SUBOPT Subspace iteration options SUBSIZ Subspace work ng size NPAD No. of extra vectors NPERBK No of modes memory block Number of subspace iterations NUMSSI Maximum number NSHIFT Min. before shift Strmck Sturm sequence check 8 4 14 0 0 At shift end pts J OK 1 Cancel 1 Help Figure Window of Subspace Modal Analysis. 2 The calculated result for the first mode of vibration appears on ANSYS Graphics wmdOW as shown in Figure . Theresonant frequency is shown as FRQE at the upper left side on the window. READTHE CALCULATEDRESULTSOF HIGHERMODES OF VIBRATION Command I ANSYS Main Menu R General PoTtprocRRead Results F Next Set Perform the same steps described in Section and the calculated results from the seco ndmtdt tethe siihOmodeofgibrationure dtsphytd onthe windtws as shown in Figures . From these vibration modes it is found that a large radial displacfmentappears at tRe fifth modetf vibration. Mode analysis of a suspension for Hard-disc drive 185 Plot Deformed Shape PLDISP Plot Deformed Shape KUND Items to be plotted Def shape only Def undef edge Apply Figure Window of Plot Deformed shape. Figure The first mode of vibration. 186 Chapter 4 Mode analysis Figure Figure The third mode of .
