Khảo sát dao động riêng của khoang hành khách để đánh giá độ ổn của xe bus cỡ lớn lắp ráp tại Việt Nam

NGHIEN cuu-TRAO DOI

KHAO SAT DAO DONG RIENG CUA KHOANG HANH KHACH DE

DANH GIA DO 6 N CUA XE BUS CO LON LAP RAP TAI VIET NAM

STUDY ON MODAL APPROACH OF THE SPACE INSIDE THE BUS BODY TO

ASSESS THE NOISE AND VIBRATION OF 45 SEATS BUS

ASSEMBLY IN VIETNAM

Du Tuan Dat, Nguyen Tien Diing

Trudng Dai boc Bach khoa Ha Ndi

TOM TAT

Trong nhimg ndm qua, cdc nhd sdn xudt 6 to trong nu&c da lap rdp rdt nhieu ddng xe bus

ca l&n. Viec nghien cim phdt tnen de tdng tinh tien nghi cho ngu&i ngoi tren xe luon Id vdn de duac

quan tdm nghien aim, trong do on rung la mot trong nhimg chi tieu de ddnh gid chdt hcangxe. De

ddnh gid vd hodn thien ket cdu cho sdn phdm khung vo, viec xdc dinh dao dong rieng nhdm tim ra

cdc dang vd viing tdn so co khd ndng cong hu&ng la bu&c quan trong trong qud trinh nghien cuv.

on rung cua xe bus vd la vdn de ddng duac quan tdm nghien cuu. Bdi bdo trinh bdy mot so ket qud

khdo sdt dao dpng rieng cua khung vo vd khoi khong khi khoang hdnh khdch cua xe bus 45 cho lap

rdp tai Viet Nam. Nghien cuu ndy tap trung vdo viec xdy dung mo hinh rung on de xdc dinh cdc

dang vd vung tdn so dao dpng rieng cua khung vo, ldm ca s& cho bdi todn phdn tich on rung xe bus.

Tir khoa: Dang dao dpng rieng; Tdn so; Mo hinh phdn tu hihi han; Xe bus 45 cho.

ABSTRACT

In recent years, domestic car manufacturers have assembled many large buses. Research

and development to increase comfort for people sitting on cars is always a matter of concern,

in which noise and vibration are indicators to assess vehicle quality. In order to evaluate and

improve the structure of the bus body, the specific vibration determination ofeigenmodes and areas

of resonant frequency is an important step in the noise and vibration study process and that is a

matter of concern. The paper presents some studied results of vibration of the body and the space

inside the bus body of the 45-seat bus assembly in Vietnam. This study focuses on building of noise

and vibration model to determine the eigenmodes and individual oscillation frequency of bus body,

as a basis for the noise and vibration analysis of bus.

Keywords: Modal approach, resonant frequency, FE model. 45-seats bus. '^

ISSN 0866 - 7056

TAP CHi CO KHi VIET NAM, Sd 1+2 nam 2019

www.cokhivietnam.vn