Finite element modeling and model analysis of stretcher base of field ambulance

SU Wei-hua, XU Xin-xi, GAO Zhen-hai, CHU Ze-kun

Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161

Abstract：Based on the structure characteristics of the stretcher base of WCY2000 field ambulance, this paper sets up a finite element analysis model with two types of beam elements. The accuracies under two types of elements are discussed and model method of the same structure is presented.

Keywords：medical technical vehicle; finite element method; model analysis

Introduction

Field medical technology vehicles will inevitably be effects from vibration or shock caused by ground roughness during use, thus causing a response to a large extent influence the comfort of the wounded or the successful completion of the task in the medical transport process. Usually require vehicle bumps vibration generated wounded and the harm caused by equipment and other facilities on the minimum. To improve the dynamic performance of the vehicle system to achieve the purpose of vibration control and effective way is to perform dynamic analysis and design of structures. In modal analysis based on structural dynamic design, it is one of the most extensively studied in recent years, the field of vibration engineering undertaken. As we all know, the traditional structural design, dynamic factor in considering structural modifications, based on experience and repeatedly found to be the main means. Because although based on modal analysis and response test is easy to determine the performance of the initial defect structure, but the structure is often the question of amending ignorance, and the design engineer can only be repeatedly modified and measured based on experience and existing conditions, sometimes even redesigned completely overturned the original design. This greatly reduced the speed of design, quality is difficult to achieve optimal design. For this reason, scientists continue to explore evidence-based structural dynamic modification method, in order to achieve the purpose of optimizing the design. Finite Element Method (FEM) and experimental modal analysis (EMA) for the structural dynamic design provides two main ways. Taking WCY2000 field ambulance stretcher Taiwan as an example, using the finite element method was carried out modal analysis.