CAD环境下一种支持大装配的产品模型轻量化技术  

A Lightweight Technologies Supporting Large-Assembly for Product Model under the Environment of CAD

作　　者：赵晓峰[1,2] 门涛[3] 杨欣[3] 高庆庆[3] 张道忠[3] 

机构地区：[1]山东大学高效洁净机械制造教育部重点实验室,山东济南250061 [2]山东大学机械工程学院,山东济南250061 [3]山东山大华天软件有限公司,山东济南250000

出　　处：《东华大学学报（自然科学版）》2013年第4期407-410,416,共5页Journal of Donghua University(Natural Science)

基　　金：国家"八六三"高技术研究发展计划资助项目(2012AA040903);国际科技合作资助项目(2011DFB11490)

摘　　要：针对CAD环境下操作复杂大装配常出现加载和显示困难的问题,提出了一种CAD环境下的轻量化解决方案,将参数化表达和多细节层次(LOD)轻量表达共同定义于产品模型,满足CAD编辑需要和大装配操作.多层表达中保持了特征属性相关性,支持轻量显示时零件属性查询.默认加载LOD1表示,避免了分元操作,加载速度快.大装配操作困难时,逐层降低零件LOD层数,在流畅显示的前提下保证了显示精度.最后,在SINOVATION系统上开发实现该方案,实例表明其加载和显示效果良好.Load and display difficulties occurred usually when operating complex models under the environment of CAD, a kind of lightweight solution was put forward under the environment of CAD. According to this solution, parameterized and multilayer level of detail （LOD） lightweight presentation were designed into CAD models of products, separately, to meet the editorial requirements and lightweight display demand. The correlation of feature properties were saved in multilayer expression, and the part properties could be queried in lightweight state. The LOD1 was loaded as the default set, which could avoid the primitive operations, and ensure the loading speed. The LOD precision level of the parts would be reduced step by step to ensure the display precision under the premise of smooth display when display difficulties occurred. At last, the solution was realized in SINOVATION system, the research results showed that the effective of load and display was ~ood.

关 键 词：轻量化 大装配 模型简化 细节层次（LOD） 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]