摘要
用于地面振动试验(ground vibration test,GVT)的空气弹簧对承载能力、腔内工作压力、低频特性的要求非常高。针对该类空气弹簧低频特性,推导出其垂向频率近似表达式。通过对该表达式定性分析,发现空气弹簧垂向频率仅与其几何构型参数相关。利用Abaqus二次开发功能编写空气弹簧储气罐主腔体结构的参数化有限元模型,然后以其几何构型参数为设计变量,以空气弹簧低频特性、空气弹簧储气罐主腔体结构强度和刚度为约束,储气罐主腔体质量最小化为设计目标进行构型优化设计。结果表明优化后的结构的质量较初始设计有大幅降低。该优化设计方法能使得不同承载能力的GVT空气弹簧设计系列化。
The requirements of carrying capacity, cavity pressure and low frequency performance for air-spring of GVT are especially strict. An approximate expression of the vertical frequency was deduced for such air-spring con- sidering the low frequency characteristics. Based on the qualitative analysis, it was found that the vertical frequency was only decided by the geometric properties of the air-spring. A parameterized FE model of main structure of a gas tank was built by using the ABAQUS software and then the Air-spring Shape was optimizated so as to minimize the mass of gas tank by constraining the low frequency performance, strength and stiffness of the main structure of gas tank. The results showed that the optimized structure mass was greatly decreased. The present optimization method could be adopted for designing the GVT air-spring with different loading capabilities.
出处
《机械科学与技术》
CSCD
北大核心
2014年第3期348-353,共6页
Mechanical Science and Technology for Aerospace Engineering
关键词
地面振动试验
空气弹簧
参数化有限元模型
二次开发
构型优化
ABAQUS
air-spring
constrained optimization
design
equations of stateelement method
geometry
ground vibration test
mathematicalof gases
experiments
finite models
parameterization
parameterized FE model
pressure
secondary development
shape optimization
springs （components）
stiffness
vibrations （mechanical）
