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1、? 2006 LMS 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? LMS ? SCADAS ? ? LMS test. lab ? ? CAE ? ? ?TP319.9 Stiffness Identification of the Joints Based on the Experimental Mode XIAO Yongshan ? WANG Xing ? SONG Fumin ? (1 CAE Department of HANS CNC Science 2 College of Mechanical Engineering of Central South
2、 University, Changsha 410083) Abstract: The bolted connection is a typical connecting method in the machine structure. Based on the parameter identification theory of the joins, the modal experiment of the bolted assembly is operated by the LMS hardware and software, including the modal experimental
3、 equipment SCADAS and the LMS test?. lab. The joint parameters are identified by the FEM optimization. The results show that this method can solve the problem of obtaining the joint parameters in virtual prototyping modeling and boost the CAE application in the machine tools.? Key word: Modal Experi
4、ment?Joint?FEM?Optimization 1.? ? ? ? ? 2.? ? ? ? ? ? 2006 LMS ? ? ? ? ? )()()()(tFtkblxtxcbltxm? ? ? (1) ? m ?k?c ? ?F(t)?b ?l? ? 300mm?50mm? )(t x ? ? )(t x ? )(tx ? ? ? tj eFtF ? ?)()(? tj eXx ? ?)(? ? ee kcjm X ? ? ? ? 2 1 )( ? ? ? ? (2) ? ? ? ? ? ? (3) cblce? ? (4) kblke? ? ? ? ? ? ? ? ? ? ? mk
5、 c f m k 2 2 ? ? ? ? ? ? ? ? ? ? ? mkc fmk e e 2 . )2.( 2 ? ? ? ? bl mk bl c c e ?2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? bl fm bl k k e 2 )2(? ? ? ? 3.? ? ? 2 ? 2006 LMS ?/? ? 3.1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 3.2 ? ? 20 ? 4?7 ? ? 1? 8?11? 0.00 6500.00 Hz 0.00 18.00 Ampl
6、itude (g/N) 0.00 15.00 Amplitude (g/N) FFRF 1:1:+Z/1:1:-Z FFRF 1:2:+Z/1:1:-Z FFRF 1:3:+Z/1:1:-Z FFRF 1:4:+Z/1:1:-Z FFRF 1:5:+Z/1:1:-Z FFRF 1:6:+Z/1:1:-Z FFRF 1:7:+Z/1:1:-Z FFRF 1:9:+Z/1:1:-Z FFRF 2:2:+Z/1:1:-Z FFRF 2:3:+Z/1:1:-Z FFRF 2:4:+Z/1:1:-Z FFRF 2:5:+Z/1:1:-Z FFRF 2:6:+Z/1:1:-Z FFRF 2:7:+Z/1:
7、1:-Z FFRF 2:8:+Z/1:1:-Z BFRF 1:8:+Z/1:1:-Z BFRF 2:1:+Z/1:1:-Z BFRF 2:9:+Z/1:1:-Z BFRF 2:10:+Z/1:1:-Z BFRF 2:11:+Z/1:1:-Z 0.00 6400.00 Hz 0.00 27.00 Amplitude (g/N) 0.00 23.00 Amplitude (g/N) FFRF 1:1:+X/1:1:+X FFRF 1:2:+X/1:1:+X FFRF 1:3:+X/1:1:+X FFRF 1:4:+X/1:1:+X FFRF 1:5:+X/1:1:+X FFRF 1:6:+X/1:
8、1:+X FFRF 1:7:+X/1:1:+X FFRF 1:8:+X/1:1:+X FFRF 1:9:+X/1:1:+X FFRF 2:2:+X/1:1:+X FFRF 2:3:+X/1:1:+X FFRF 2:6:+X/1:1:+X FFRF 2:7:+X/1:1:+X FFRF 2:9:+X/1:1:+X FFRF 2:10:+X/1:1:+X FFRF 2:11:+X/1:1:+X BFRF 2:1:+X/1:1:+X BFRF 2:4:+X/1:1:+X BFRF 2:5:+X/1:1:+X BFRF 2:8:+X/1:1:+X ? ? ? ? ? ? ? ? ? ? ? ? 3 0
9、.001.16e+3Linear Hz 4.74e-3 9.66 Amplitude (g/N) o oo ooo ovvo vvov vovovo vovovo ovovos ssv s s s s s s v s sv s ss oo sss v ss sssv ooos sso oosv s sssos s ss o ooov v vo voooo oovooov vo oov vooos vo oovvovvs v oov vo oov v oo ov oov vooo vv voo ov ov os vv vvovv v vooo v voov vv vvv v vovv voovo
10、oov v vovovooov vov ovoo ovovvv v vov ov vo oov vovovvv vv oovov v vvovvoovvv ovooovv vovvv o vvv vvov ovo oo ov ovvvvvs v vo ov vv vvvovs vvvv ovoov vo vvvv vvs vvo ov v ovvoo vovo vvs vvv vv oovovo vvvoovvv vvovv vvv ov ovoovvvv vvvvvvvvvvv vvvvv oo vvoovvo vvv vv os vv vvv ooo ovvvovovvvo vvvos v
11、vvvv ooovvovvv v ovovvovvos vv vvv 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 0.006.31e+3Linear Hz 3.57e-3 19.9 Amplitude (g/N) o o oo oovo ovos s v s s ss sss sss sss soos ssv vs oss ssssv ss svossv sosso ss o sossoss ssssv ssss ssssv ssss s sss s s ss s
12、s v sv ss s vssss ss ss ssos sss osss v vsss sss sss ssssoss v v oovvov vovvoov vvv oov vvovoov vovvvvoo ovvvvvoo vvvvovvv vvvovoov ovvovvvvv s vvvoovvvv v ovvvvovvvo o voovvvovvv vvos vvovvvovvv s v ovvvvvvv vvvovv vvv voovvooo ovvvvovvvv oooovvvoo vvov ovvos vvvvvo vvvvvv oovvoov vovv v vvo v vvvv
13、vv oovvvo ov vvvvv ovo vvvvv ovosovo vv vvv vvvvvvv oo s ovvv ov vov vov vvvvv oo v vvov vv vo vvvv vvv vvv vvvvo ov vovs vv vo ovoov vvvvvvv v ooovovvs vv voovoov vvv vv ooovv voovovv v 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 ? ? ? ? ? ? ? ? ? ? 2006 L
14、MS ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4.? ? ? 4.1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4 ? 2006 LMS ? 4.2 ? ? ? ? ? ? ? ? ? ? ? ? ? n i Ti TiUi UnUTnTOBJ 1 2 ), 8, 1(? (7) ?Ti? ? ? ?Ui? ? ? ? x K y K z K ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
15、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 5 ? 2006 LMS 6 ? 5.? ? ? LMS ? SCADAS ? ? LMS test.lab ? ? ? ? 1) ?. ?J. 2004 ? MSC.Software ?2004. 2) ?. MSC.Nastran ?M. ?2004. 3) LMS ?. Test.Lab 6A ?,2006. 4) Fritzen?C?P? Identification 0f Mass, Damping and Stiffness Matrices
16、of Mechanical Systems. ASME Journa1 of Vibration, Acoustics, Stress and Reliability in Design?1986(108)?9-l6 5) Tsai?J?S?The Identification of Dynamic Characteristics of a Single Bolt Joint. Journal of Sound and Vibration. 1988(125)? 487-502 6) Thornley. R.H, Konenlgshergel F? Dynamic Characteristic of Machined Joints Loaded and Excited Normal to the joint face? CIRP?1971 7) M. Yoshimura?Computer Aided Design Improvement of Machine Tools? Structure Incorporating Joint Dynamics Data. Annals of CIRP, Vol28/1-1979. 返回目录