基于虚拟样机技术的机体振动灵敏度分析及优化  

Vibration sensitivity analysis and optimization of engine block based on virtual prototype technology

作　　者：杜宪峰[1,2] 张磊[1] 景亚兵[2] 朱志强[1] 

机构地区：[1]辽宁工业大学辽宁省汽车振动与噪声工程技术研究中心,锦州121001 [2]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《现代制造工程》2017年第11期54-59,共6页Modern Manufacturing Engineering

基　　金：辽宁省博士启动基金项目(20141200);辽宁省教育厅项目(L2015228)

摘　　要：柴油机机体振动速度最小化是改善结构本身及相连部件振动噪声特性的关键问题。通过柴油机机体虚拟仿真计算获得振动响应随结构参数的变化率,并探讨目标函数和约束条件对设计变量的灵敏度问题,以确定影响机体振动速度与结构质量的关键设计变量。同时,通过评价机体结构形状及尺寸因素对振动速度与结构质量的影响规律,有效协调两者的权重关系。研究结果表明,改进设计使其振动速度降低了23.87%,结构质量减轻了12kg,从而验证了机体振动速度最小化研究的合理性与有效性。Engine block vibration velocity minimization is a key issue to improve noise and vibration characteristics of the struc- ture itself and the connected component. Achieves the rate of change of vibration response with the block structural parameters through the virtual simulation analysis, and explore into the sensitivity problem for objective function and constraints influence on the design variables, in order to ensure the key design variables of vibration velocity and quality. Meanwhile, the weight relation- ships between structural quality and vibration velocity were coordinated effectively through the influence of block structure shape and size. The results showed that the vibration velocity was reduced by 23.87% , and the structural quality reduced 12kg in the improved process, and also verified the rationality and effective in the research of minimizing the vibration velocity of the block.

关 键 词：振动速度 灵敏度分析 虚拟样机 机体 

分 类 号：TH113.1[机械工程—机械设计及理论]