NGHIEN CIJfU-TRAOOOl ^PWfi TICH DfiO DONG RIEflG TRONG TJNH TOflN KET CflU KHUNG ^E C0 Sd LflP PHflO PHONG KHONG B^NG PHflN MEM fINSYS WORKBENCH MODAL ANALYSIS TO SOLVE THE STRUCTURAL VEHICLE FRAME THAT ARE INSTALLED ANTI-AIRCRAFT BY ANSYS WORKBENCH SOFTWARE PGS,TS Vu Due Lap, ThS Nguyen Manh Hung Hoc vien Ky thuat Quan sir TOM TAT Bdi bao trinh bdy kit qua nghien ciiu phan tich dao dong rieng trUdc phan tich cac bdi toan dong lUc hoc khac, giup cho ngUdi thiet kehinh dung dUdc mo hinh se dap iing the ndo chiu cac tdi trongkhdc nhau; cho phep thiet ke tranh dUdc cong hUdng dao dong tai cac tan so dac biet Ket qua nghien ciiu diidc dp dung cho viec thiet ke khungphu de lap phdo phong khong ABSTRACT This paper presents the results of modal analysis before analyzing the dynamics of other problems, allowing the designer to visualize the model will respond when subjected to different loads, from that avoid resonance vibrations at specific frequencies Research results are applied to the design of sub-frame to install anti-aircrafi artillery DAT VAN DE Khi ban phao toan bd xe ca sd dUdc chong bdi chan chong, xe ludn dao ddng dUdi sU tac Qua trinh thiet ke lap rap to hop vCi dung cua ngoai liic, dac biet dao ddng se tang len xe co sd, phai dap Ung rat nhieu cac yeu cau manh tan so kich thich cua lUc phat ban trung dat ve ky thuat, cdng nghe mot nhUng vdi tan sd dao ddng rieng cua xe [2] Xac dinh tan yeu cau ve ky thuat dd la phai dap Ung dieu kien sd rieng va dang rieng cua xe giai doan ben ciia khung xe chiu tac ddng cua liic phat thiet ke de cd can cif khoa hoc dUa cac phUOng ban an dieu chinh ket cau, nham hoan thien td hop xe - phao TAP CHI CO KHI VIET NAM