摘要
以多功能三臂挖掘机二级臂为研究对象,以二级臂的质量最小为设计目标,以设计空间的单元相对密度为设计变量,以模型强度和刚度为约束条件,利用Altair Inspire对原模型结构进行拓扑优化,去除了原模型多余材料,并利用Inspire对模型进行了不同工况的受力分析,进而得出最优的优化重构模型,最终二级臂质量减小约33.6%。对比优化前后有限元静强度分析结果发现,该模型优化后的米塞斯应力虽然有所增大,但是仍远小于材料屈服强度,为挖掘机的设计生产提供设计依据,为零部件结构设计提供一种新的轻量化设计思路。最后,3D打印出10%比例的模型进行仿真试验,结果表明:结构优化后的模型可有效降低能耗,提高工作效率,验证了优化的有效性。
In this article,with the focus on the multi-functional three-arm excavator’s secondary arm,the minimum mass of the secondary arm as the design objective,the relative density of the design space’s elements as the design variable,and the model strength and stiffness as the constraints,Altair Inspire is used to optimize the topology of the original model structure and remove excessive materials.Besides,Altair Inspire is used to analyze the force on the model under different working conditions.Then,the optimal optimization reconstruction model is worked out;the mass of the secondary arm reduces by about 33.6%.Efforts are made to compare the results of the finite-element analysis on the static strength before and after optimization;it is found that although the Mises stress on the model increases after optimization,it is still much smaller than the material’s yield strength,which provides basis for design and production of excavators as well as a new idea of lightweight design for structural design of components.Finally,the simulation test is carried out by 3D printing of the model in a proportion of 10%.The results show that after structural optimization the model reduces energy consumption,improves working efficiency,which verifies that this optimization method is effective.
作者
赵铮宇
朱颜
程兴群
相国
刘畅
韩文超
ZHAO Zhengyu;ZHU Yan;CHENG Xingqun;XIANG Guo;LIU Chang;HAN Wenchao(College of Mechanical and Automotive Engineering,Liaocheng University,Liaocheng 252000)
出处
《机械设计》
北大核心
2025年第10期133-139,共7页
Journal of Machine Design
基金
山东省自然科学基金(ZR2020ME113)
聊城大学博士启动基金项目(318051825)
聊城大学基金项目(311102133)
大学生创新创业训练项目(CXCY2023122)。
关键词
二级臂
拓扑优化
INSPIRE
变密度法
轻量化设计
3D打印
仿真分析
secondary arm
topology optimization
Inspire
variable density method
lightweight design
3 D printing
simulation analysis
