悬背式箱体结构加强筋布局研究  

Stiffeners Layout Design for Hanging-back Box

作　　者：江川[1,2,3] 向春生[1,2] 刘儒贞[1,2] 

机构地区：[1]中国科学院光电技术研究所,成都610209 [2]中国科学院光束控制重点实验室,成都610209 [3]中国科学院大学,北京100049

出　　处：《光电工程》2016年第7期40-44,共5页Opto-Electronic Engineering

摘　　要：为了使悬背式箱体结构具有较好的静动态特性,研究了不同加强筋分布方式对整个箱体结构的影响。结合悬背式光电载荷箱体的实际工况,建立了ANSYS有限元模型;在静态和模态分析基础上,对箱体结构提出了多种改进意见。应用PROE软件对加强筋的形状和位置进行参数化建模,实现不同分布形式的加强筋模型的快速建立。应用ANSYS软件对不同加强筋箱体模型作有限元分析,并将结果分析比较,提出一种折衷评价函数对结果优劣进行评判,选定了最优的加强筋布局方式。最后考虑到整个箱体的实际应用环境,对加强筋的形状尺寸进行了调节,在箱体内部法兰盘处增加了一条纵向加强筋,确定了最终的箱体结构形式。优化后的箱体静态工况最大位移从0.029 mm下降到0.013 mm,达到光电载荷精度要求;一阶谐振频率从88 Hz提高到140 Hz,成功避开80Hz、85 Hz和100 Hz工作激振频率。悬背式箱体整体性能得到极大提升。该箱体结构已应用于实际光电设备中。In order to improve the static and dynamic characteristics of hanging-back box, the effect of different stiffeners distribution modes was researched. Combined with engineering practice of a hanging box with photoelectric load, ANSYS model was set up and eight kinds of suggestions were presented based on the static and modal analysis results. PROE was applied to set up the parametric model, which can achieve models with different distribution forms of stiffeners in a shorter time. ANSYS was applied to analyze the box with different stiffeners, and a compromise evaluation function was presented to help select the best way of strengthening. At last, considering the practical application of the box, the size of stiffeners was changed and a longitudinal stiffener was added. In conclusion, the static maximum displacement of the optimized box reduced from 0.029 mm to 0.013 mm, meeting the accuracy requirement and the fundamental frequency increased from 88 Hz to140 Hz avoiding the vibration frequency points including 80 Hz, 85 Hz and 100 Hz. The box has been used in a photoelectric device.

关 键 词：悬背式箱体 参数化 有限元方法 加强筋 评价函数 

分 类 号：TH122[机械工程—机械设计及理论] TB21[一般工业技术—工程设计测绘]