基于虚拟样机的动态轻量化设计方法  

Virtual-prototype-based dynamic lightening design

作　　者：彭禹[1] 郝志勇[1] 

机构地区：[1]浙江大学机械与能源工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第6期984-988,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50575203)

摘　　要：针对在轻量化设计的强度计算过程中,现存单工况静态边界条件导致的精度和自动化程度低的问题展开讨论,提出了基于虚拟样机的动态轻量化设计方法.该方法基于虚拟样机技术,对与机体相关的曲柄连杆机构进行动态仿真,仿真结果为强度计算提供动态的边界条件和载荷,从而可以进行多工况的强度计算,并为轻量化设计提供可靠的设计评判依据,提高计算精度的同时改善了设计自动化程度.以单缸内燃机机体为例,介绍了虚拟样机构建、有限元前/后处理,以及轻量化结构改进等方面工作.结果表明,轻量化改进设计方案经小批量试制测试,通过可靠性实验,从而证实了该设计模式的可行性和可靠性.Aiming at the problems in the strength calculation of lightening design process, such as static loads and boundary conditions, low efficiency and low level of automatization, a dynamic lightening design method based on virtual prototype （VP） was proposed as a solution. A VP-based simulation of crank-train was executed. Using the simulation results of dynamic loads and boundary conditions for the FE strength calculation, the dynamic strength calculation on multi-moments could be conducted. Based on the calculation results, the accuracy, efficiency and automatization level of the whole design process could be improved to a great extent. Taking the single-cylindered engine block as an example, the application procedure was introduced, from VP constructing to pre/post-processing of FEM, then to lightening modification, A dependability test on the small-scaled trial product practically proved the feasibility and dependability of the new design method.

关 键 词：机体 缸体 动态设计 轻量化设计 虚拟样机 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程] TK05