基于MPI的注塑模分析前处理及优化设计的实现   总被引：1，自引：1，他引：1  

曾亚森  梁飞华  莫才颂  刘好 《茂名学院学报》2006,16(4):51-55

比较应用CAD/CAE/CAM技术的注塑模设计制造方法与传统模具设计制造过程,说明MPI作用与在优化设计中的地位;MPI对注塑模进行模流分析,建立在以网格划分及修改为主要内容的分析前处理基础上进行,通过一实例在MPI环境下对模型网格划分及修改,并根据注塑模工艺过程参数,进行最佳浇口位置的分析与浇口位置确定,说明应用MPI可实现注塑模设计优化。  相似文献   

BASES Position Statement on Guidelines for Resistance Exercise in Young People     

G Stratton  M Jones  KR Fox  K Tolfrey  J Harris  N Maffulli 《Journal of sports sciences》2013,31(4):383-390

Abstract

Despite the performance concerns of dehydration in other sports, there are currently no data on the effects of rapid weight-loss on the physical and cognitive performance of jockeys in a sport-specific context. In a randomised crossover design, eight Great Britain (GB) male licensed jockeys were assessed for chest strength, leg strength, simulated riding performance (assessed by maximum pushing frequency on a mechanical riding simulator during the final two furlongs of a simulated 2 mile race) and simple reaction time after performing 45 min of exercise, during which euhydration was maintained (Control trial) or induced 2% dehydration (Rapid Weight-Loss trial). Reductions in both chest (–13.8 ± 3.03% vs. 0.62 ± 1.04%) and leg strength (–4.8 ± 4.8% vs. –0.56 ± 2.5%) were greater in Rapid Weight-Loss compared with Control (P < 0.01 and P = 0.04, respectively). Similarly, reductions in simulated riding performance were also greater (P = 0.05) in Rapid Weight-Loss (–2.8 ± 4.0%) compared with Control (–0.07 ± 1.5%), whereas there were no significant changes (P = 0.14) in simple reaction time. We conclude that a 2% reduction in body mass, as achieved by 45 min of moderate-intensity exercise undertaken in a sweatsuit (a common method of inducing acute dehydration by jockeys), significantly impairs maximum pushing frequency during a simulated race. In addition, the observed reductions in strength may also increase the occupational hazards associated with race riding.  相似文献   

低渗透性硬煤层注水方法探讨     

闫建浩 《中国科技纵横》2014,(11):202-203

矿井粉尘能够引起瓦斯粉尘爆炸以及矿山工作人员的尘肺、矽肺职业病,严重影响煤矿的安全生产和工人的健康。经实践证明煤层注水是降低粉尘的最根本、最有效的方法。针对我国存在的大量低渗透性硬煤层注水效果差这一事实,本文以提高低渗透性硬煤层注水效果为目的对低渗透性硬煤层注水方法进行总结。  相似文献   

冠心宁注射液中大类成分的含量测定     

阮鸣 《南京晓庄学院学报》2013,(3):71-75

该实验通过测定冠心宁注射液中的丹参酚酸类成分和糖类成分,为评价冠心宁注射液的质量品质提供理论依据.采用紫外可见分光光度法检测,进行方法学考察,测定10批冠心宁注射液的丹参酚酸和总糖的含量.结果表明,NaNO2-Al（NO3）3显色法用于测定丹参酚酸的含量;苯酚-硫酸法用于测定总糖的含量;10批冠心宁注射液中丹参酚酸和总糖的平均含量分别为93.27mg.10 ml-1、969.87 mg.10 ml-1,分别占固含物的7.66%、79.60%.因此,该方法简便快速、准确可靠,可有效评价冠心宁注射液中80%以上的大类成分的含量.  相似文献   

工业用水总硬度在线检测方法探索     

李亚丽  王小锋 《南京晓庄学院学报》2013,(3):57-60

将流动注射技术应用于水中总硬度的分析,并在各种实验条件下研究相关因素的影响.在EDTA浓度为0.02 mol/L时,检测范围能满足国标要求的5～1000 mg/L测量范围,能够很好地应用于炼钢厂中生产用水、锅炉水的总硬度的在线测定.  相似文献   

新型注射成型技术及特点     

孟兵  孙建丽  刘志学 《成都航空职业技术学院学报》2013,29(1):42-44

本文针对高分子材料的注射成型介绍了动态注射成型、气体辅助注射成型、水辅助注射成型、超临界流体注塑成型、注射压缩成型、模具滑合成型、快速热循环注射成型等新技术的进展及其特点。  相似文献   

Progress in research on mixing techniques for transverse injection flow fields in supersonic crossflows     

Wei Huang  Li Yan 《浙江大学学报(A卷英文版)》2013,14(8):554-564

The transverse injection flow field has an important impact on the flowpath design of scramjet engines. At present a combination of the transverse injection scheme and any other flame holder has been widely employed in hypersonic propulsion systems to promote the mixing process between the fuel and the supersonic freestream; combustion efficiency has been improved thereby, as well as engine thrust. Research on mixing techniques for the transverse injection flow field is summarized from four aspects, namely the jet-to-crossflow pressure ratio, the geometric configuration of the injection port, the number of injection ports, and the injection angle. In conclusion, urgent investigations of mixing techniques of the transverse injection flow field are pro- posed, especiaUy data mining in the quantitative analytical results for transverse injection flow field, based on results from multi-objective design optimization theory.  相似文献   

Ajax安全性问题及对策     

李驰 《宜宾师范高等专科学校学报》2013,(12):72-76,87

系统全面地分析了Ajax应用程序的安全隐患,包括Ajax程序对传统Web程序中存在的一些安全隐患如SQL注入攻击、跨站脚本攻击XSS、跨站请求伪造攻击CSRF等进一步加重以及新增的如JSON注入、JSON劫持等额外的安全隐患,对每种情况作了具体的分析,给出了对应的解决方法.并针对Ajax程序本身的特点,给出了一个以严格输入验证和Web入侵检测为总体指导思想的解决策略.  相似文献   

拼装玩具中一连接件注射模的设计     

苏冬云  赵灵 《南通职业大学学报》2013,(2):98-101

根据某拼装玩具中一连接件的工艺特点,阐述了该连接件注射模的结构设计和模具工作过程。注射模采用滑块斜导柱侧向分型机构、齿条和各级齿轮传动脱螺纹抽芯机构完成塑件成型,并利用定距拉板完成二次分型,刮下产品b,再利用推杆推出产品a,顺利开模;合模时,则采用螺钉和压缩弹簧保证斜导柱准确地进入滑块的斜孔中。经批量生产验证,该模具结构紧凑,工作可靠,运转平稳,生产的塑件能满足要求。  相似文献   

基于Moldflow数控加工仿真器面板模具设计     

任卫东 《张家口职业技术学院学报》2012,25(1):54-56

介绍基于数控加工仿真器面板的注塑模具设计流程。使用Moldflow软件对塑件的注射成型过程进行CAE分析,找出模具设计过程中可能产生各种缺陷的原因,并制定解决方案,最终确定出最优化的模具结构。在UG MoldWizard基础上,完成注塑模设计。结果表明,在实际的生产过程中,利用Moldflow进行分析在优化塑料模设计和工艺参数等方面具有指导作用。  相似文献