Modeling and dynamic analysis of stretcher bed on ambulance based on virtual prototyping technology
- VernacularTitle:基于虚拟样机技术的车载担架床建模与仿真
- Author:
Lidong FAN
;
Nan XIAO
;
Zhigang ZHANG
;
Shuguang LI
- Publication Type:Journal Article
- Keywords:
stretcher bed;
virtual prototyping;
three-dimension solid model;
sine wave superposition;
simulation;
dynamic analysis;
acceleration;
vibration reduction
- From:
Chinese Medical Equipment Journal
1989;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To obtain the dynamic characteristics of the stretcher bed without absorber, and to optimize the absorber. Methods Pro/E and ADAMS were used to build the dynamic model of the stretcher bed on ambulance. The principle of random sine wave superposition and Visual Basic language were used to produce time-domain pavement roughness which could stimulate the model. The system was analyzed. Results The curve of vertical acceleration in time and frequency domain and the RMS of vertical acceleration without absorber were obtained by simulation., and a reasonably suited pair of stiffness and damping coefficient was found to reduce the vibration intensity. Conclusion The inherent frequency of the stretcher bed is 2.7Hz, which is out of the sympathetic vibration area of decubital body. Through adjusting and optimizing the stiffness and damping of vibration reduction equipment, the stretcher bed is more comfortable.
