回转窑液压挡轮装置改进设计

介绍了回转窑液压挡轮装置的优化设计过程。具体设计方案是：将挡轮的上部设计为挡轮盘，下部为套筒，挡轮盘和套筒为一体结构，挡轮轴为空心轴，挡轮下部的套筒套装在挡轮轴外周，在挡轮下部的套筒与挡轮轴之间安装有一组承受径向力轴承，挡轮轴的底部有环绕圆周的水平圆台，水平圆台位于挡轮下部套筒的下方，挡轮下部套筒的底部与挡轮轴底部的水平圆台之间安装有一组承受轴向力的轴承。优化设计后的挡轮结构使得轴承抗冲击能力更强，可以有效地抵抗各种冲击力，避免了轴承的损坏，大大提高了挡轮装置使用寿命，减少了维修时间，提高了生产效益。     

ANSYS在结构拓扑优化设计中的应用

计算机技术的迅猛发展带动了优化设计方法的变更。从理论上说明了拓扑优化的数学模型,结合一设计优化实例,介绍了ANSYS优化设计的思想及步骤,为使用者提供了一套系统的思维模式,创造了良好的条件和方法。     

离心机转鼓结构优化设计方法的研究

提出了一种基于有限元分析的离心机转鼓结构优化设计的新方法。通过ANSYS中的参数化建模模块建立了GKH1250虹吸离心机转鼓的计算模型,并在此基础上使用优化设计功能对其进行第一次优化计算,然后根据其优化结果对转鼓进行了刚度和强度分析,并对优化变量的限制条件作相应的调整,最后再通过有限元分析进行了第二次优化设计,实现了总质量最小的优化目标。为应用ANSYS优化设计功能进行离心机转鼓的优化设计提供了一种新的方法。     

套筒材料与壁厚对跳弹威力的影响研究

为了克服普通榴弹杀伤效果差,容易形成死角的缺陷,本文根据跳炸杀伤战斗部的结构特点,采用非线性动力程序ANSYS/LS-DYNA软件对破片套筒进行仿真计算,以确定使战斗部威力达到最大时的套筒材料和最佳壁厚。仿真结果表明:当套筒壁厚为1.5mm时,预制破片初速为最大;当套筒材料为45#钢时,预制破片初速显著提高。     

机械密封中密封环的优化设计

介绍了一种利用ANSYS软件对机械密封中密封环进行优化设计的方法。采用这种方法,通过建立参数化模型和设定目标函数的方式,优化模型后,直接计算出符合要求的结构。从而减少了设计时反复修改结构尺寸的过程,缩短了设计周期,提高了设计效率。     

基于Qt和ANSYS的含未焊透缺陷压力管道安全评定系统开发

介绍了基于内压、弯矩、扭矩组合载荷作用下的含未焊透缺陷压力管道的安全评定方法及其步骤。重点阐述了运用Qt对ANSYS进行的封装方法,以及程序与ANSYS的交互方法和计算中的数据流向,探讨了一种可行的工程数据存储格式和通过Qt操纵工程文件的方法,介绍了程序用户界面的构建方法,并且展示了主要的用户界面,最后建立了完整的压力管道安全评定系统软件,给出了部分重要的程序代码,经实践应用验证软件效果良好。     

套筒接杆护套小总成3D打印工艺的研究

动力工具通常带有套筒和接杆,为避免操作工在紧固操作过程中直接接触旋转的套筒和接杆,设计了既安全又便于安装的热塑性聚氨酯（TPU）套筒接杆护套小总成。针对套筒接杆护套小总成,运用SolidWorks和Teamcenter软件进行3D建模与整车环境虚拟评估;利用3D打印技术制备TPU试样,通过正交试验方法分析打印工艺参数对试样硬度和拉伸性能的影响,得到了较为理想的套筒接杆护套小总成3D打印工艺参数组合：打印层高　0.2 mm,壁厚　1.2 mm,打印温度　220 ℃,打印速度　35 mm·s^-1。在该优化工艺条件下打印的套筒接杆护套小总成满足使用要求。     

钢筋套筒连接技术在核电工程中的应用

钢筋套筒连接技术已经在工业、民用、道路、桥梁、水工建筑、海洋工程、核电工程等领域广泛应用。本文介绍了常用的钢筋连接套筒分类以及不同国家钢筋连接套筒强度要求,并介绍了钢筋套筒连接技术在第三代非能动核电工程中的应用情况和技术要求。由于在第三代非能动核电工程采用了钢板混凝土这一结构形式,从而大量使用了可焊型机械套筒,目前可焊型套筒采用进口套筒,基于此,本文亦对可焊型套筒的国产化进行了思考和探讨。     

双井节能抽油机机架结构的优化设计

本文探讨了基于ANSYS参数化有限元分析过程的设计优化包含三大变量,设计变量、状态变量、目标函数:最终的优化目的,ANSYS提供了两种主要的优化方法:零阶方法,一阶方法。在此基础上对机架结构进行了结构优化设计,达到了减轻自重的目的。为今后利用现代方法设计抽油机机架起到了一个很好的引导作用。     

Ti3SiC2/Al2O3陶瓷基复合材料支护托板结构优化设计

本文以ANSYS优化设计基本理论为基础,以ANSYS为模拟分析软件,通过对Ti3SiC2/A12O3陶瓷基复合材料支护托板进行结构优化设计,最终得到满足强度要求、容易成型、且成本较低的矿用支护托板.为工程上的支护托板的优化设计提供了依据.     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。