|Table of Contents|

Vibration comfort of mining dump truck based on particle damping(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2019年06期
Page:
111-124
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Vibration comfort of mining dump truck based on particle damping
Author(s):
XIAO Wang-qiang1;  LU Da-jun1;  SONG Li-ming2;  YANG Zhe2;  LI Ze-guang2
(1. School of Aerospace Engineering, Xiamen University, Xiamen 361000, Fujian, China; 2. Inner Mongolia North Hauler Joint Stock Co., Ltd., Baotou 014030, Inner Mongolia, China)
Keywords:
mining dump truck;  particle damping;  discrete element;  vibration reduction;  vibration comfort
PACS:
U463.83
DOI:
10.19818/j.cnki.1671-1637.2019.06.011
Abstract:
Particle damping technology was used to reduce the vibration of the cab seat and improve its vibration comfort. The plinth between the cab floor and the seat was selected as a particle damper, and the discrete element model of the plinth damper was established. By simulating the vibration environment of the complete truck at the highest engine rotate speed, for different damper schemes(particle material, damper layer number, particle size, and particle filling rate), the energy dissipation based on the discrete element model was analyzed, and the optimal solution was obtained. The physical model was tested, and the root mean square values of the plinth acceleration of the original structure and the structure installed particle damper were compared, and the vibration reduction effect was confirmed. The feasibility of the discrete element model was verified by comparing the simulation results with the test results. The optimal scheme was applied in the test of the sample truck, the responses of the seat under different engine rotate speeds were collected and analyzed. At the highest engine rotate speed, the comfort analysis of human body vibration exposure was performed. Research result shows that based on the peak value of the time domain chart, the maximum acceleration response of the seat occurs at 425 Hz, which is 0.643 4 m·s-2 before vibration reduction. The maximum value is 0.087 5 m·s-2 occurs at 25 Hz after particle damper was installed. Based on the time domain chart, when the engine rotate speed is 750, 1 110, 1 470, 1 830, and 2 200 r·min-1, respectively, after particle damper was installed, the acceleration root mean square values reduce by 24.2%, 29.6%, 34.7%, 39.2%, and 46.0%, respectively. The higher the engine rotate speed, the better the vibration reduction effect of particle damper. After installing the particle damper, the comfort durations at each frequency significantly increase. At 3.1 and 4.0 Hz, the comfort limit durations increase by 1.50 times after the particle damper was used. At 20 Hz, the comfort limit duration increases by 1.57 times after the particle damper was used. 7 tabs, 26 figs, 32 refs.

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Last Update: 2020-01-13