文中运用遗传算法在盒式应变天平上对测量元件进行单目标和多目标优化设计,并利用ABAQUS商用软件建立盒式天平的数学模型。通过有限元受力分析,对比优化前后天平应变梁的灵敏度和刚度变化。结果表明,考虑刚度因素的多目标优化结果优于仅考虑灵敏度的单目标优化;所采用的盒式应变天平遗传算法求解速度快,计算效率高。可见多目标遗传算法可以较好地应用于盒式应变天平元件优化设计。

In this paper, genetic algorithm optimization with single objective and multi-objective optimization was applied to design the geometric parameters of measuring elements of a cassette strain-gauge balance used in NF-3 wind tunnel located at Northwestern Polytechnical University. The business software ABAQUS was used to build the mathematical model of the cassette strain-gauge balance and to be analyzed. On the base of applying the original mechanics and the finite element analysis to the optimized balance and comparing it with traditional situation, some conclusions could be obtained. The drawn results show that the finite element computed result is conformed to the cassette strain-gauge balance design, and the approach of multi-objective optimization regarding stiffness is superior to the single-objective optimization; the method of genetic algorithm optimization cost short calculating time, and it has efficiency. So proposals from the paper may be have some successful engineering application value for the cassette strain gauge balance design.