文档介绍：Available online at hanism
and
Machine Theory
Mechanism and Machine Theory 43 (2008) 18–32
ate/mechmt
Design, test and modelling evaluation approach of a novel
Si-oil shock absorber for protection of electronic equipment
in moving vehicles
Ping Yang *, Ninbo Liao, Jianbo Yang
Laboratory of Advanced Design and Manufacturing, School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
Received 28 March 2006; received in revised form 18 May 2007; accepted 4 June 2007
Available online 31 July 2007
Abstract
Electronic equipment systems are precision system. There are some vibrations and impact in moving vehicles for road
environments. Therefore, shock absorber is significant in protection of electronic equipment in moving vehicles. The objec-
tive of this paper is to provide a systematic investigation to design or evaluation of a shock absorber for protection of elec-
tronic equipment system in harsh vibration-impact environment. A novel Si-oil coupling damping shock absorber is
designed and manufactured through coupling Si-oil, rubber ball and spring by ingenious tactics. The physical mechanism
of a prototype shock absorber is systematically investigated by dynamic test. A nonlinear dynamic model for the shock
absorber is presented by analyzing the internal fluid dynamic phenomenon with respect to the prototype. Comparisons
between experimental data and simulation result confirm the validity of the model. In the meantime, evaluation of the
importance of some key factors by using the mathematical model for designing is discussed. It shows amplitude and fre-
quency of excitation, as well as fluid viscosity, ratio of damping area are the key factors to ensure the performances of the
shock absorber. The change of these factors will change the working characteristics and performances of the shock
absorber.
Ó 2007 Elsevier Ltd. All rights reserved.
Keywords: Electronic equipment; Si-oil coupling shock absorber; Dynamics; Mod