检索范围:
排序: 展示方式:
Prediction of cutting force in turning of UD-GFRP using mathematical model and simulated annealing
Meenu GUPTA, Surinder Kumar GILL
《机械工程前沿(英文)》 2012年 第7卷 第4期 页码 417-426 doi: 10.1007/s11465-012-0343-2
Glass fiber reinforced plastics (GFRPs) composite is considered to be an alternative to heavy exortic materials. According to the need for accurate machining of composites has increased enormously. During machining, the obtaining cutting force is an important aspect. The present investigation deals with the study and development of a cutting force prediction model for the machining of unidirectional glass fiber reinforced plastics (UD-GFRP) composite using regression modeling and optimization by simulated annealing. The process parameters considered include cutting speed, feed rate and depth of cut. The predicted values radial cutting force model is compared with the experimental values. The results of prediction are quite close with the experimental values. The influences of different parameters in machining of UD-GFRP composite have been analyzed.
关键词: UD-GFRP ANOVA radial cutting force PCD tool Taguchi method regression analysis simulated annealing multi objective techniques
卞有生,王天喜,陈正龙,崔斌
《中国工程科学》 2002年 第4卷 第7期 页码 17-22
文章在对胜利油田生态农场系统结构分析的基础上,根据农场规划目标,建立了由投入产出模型和线性规划模型相结合的经济发展数学模型。应用该模型指导农场的经济建设,取得了 极好的效果,证明所建立的模型是正确的。
潘健生,张伟民,田东,顾剑锋,胡明娟
《中国工程科学》 2003年 第5卷 第5期 页码 47-54
热处理计算机模拟是热处理智能化的基础。采用三维非线性有限元模型和界面条件突变的处理方法实现了几种复杂形状零件在复杂的淬火操作过程中温度场、相变、应力和应变的模拟,模拟结果与实测结果基本相符。将气体渗碳的计算机模拟与计算机控制技术相结合,研制成功智能型密封多用炉自动生产线,已处理渗碳件3 000炉次以上,全部合格。计算机模拟技术的应用明显提高渗碳和渗氮零件的承载能力和可靠性,减少热处理变形,缩短渗碳时间。建议将机械产品的CAD、选材与热处理的CAE和产品可靠性的动力评估技术相结合,进行高可靠而又无冗余的产品设计。
Development of a hydrodynamic model and the corresponding virtual software for dual-loop circulating
Shanwei Hu, Xinhua Liu
《化学科学与工程前沿(英文)》 2021年 第15卷 第3期 页码 579-590 doi: 10.1007/s11705-020-1953-6
关键词: multi-loop circulating fluidized bed mathematical modeling energy minimization multiscale virtual fluidization mesoscale structure
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 312-321 doi: 10.1007/s11465-012-0308-5
In this paper, loxodromic-type normal circular-arc spiral bevel gear is proposed as a novel application of the circular-arc tooth profile at the gear transmission with intersecting axes. Based on the principle of molding-surface conjugation, the study develops a mathematical model for the tooth alignment curve and the computational flow at the design stage to enable the generation of the tooth surface. Machining of the tooth surface is then carried out to determine the interference-free tool path of the numerical control (NC). Moreover, a pair of loxodromic-type normal circular-arc spiral bevel gears is manufactured on computer numerical control (CNC) machine tools. The proposed theory and method are experimentally investigated, and the obtained results primarily reflect the superior performance of the proposed novel gear.
关键词: loxodrome circular-arc tooth profile Wildhaber-Novikov (W-N) gear spiral bevel gear
Preparation of manganese (III) acetylacetonate nanoparticles via an environmentally benign route
M. S. Shalaby, H. Abdallah
《化学科学与工程前沿(英文)》 2013年 第7卷 第3期 页码 329-337 doi: 10.1007/s11705-013-1339-0
关键词: green chemistry manganese (III) acetylacetonate reaction conversion Mathematical model
Alexey FILIPPOV, Maria KUZNETSOVA, Alexander ROGOZHIN, Olga IAKUSHEVA, Valentina DEMIDOVA, Natalia STATSYUK
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 462-468 doi: 10.15302/J-FASE-2018239
Late blight is one of the most important potato diseases. To minimize yield losses, various protective measures are used including fungicide application. Active use of fungicides results in a contamination of the environment. Therefore, crop protection strategies optimizing the number of treatments are of great interest. Using information about late blight development in an experimental potato field recorded over 30 seasons, a simulator to forecast yield losses caused by the disease was developed based on the number of 5-d periods favorable for reinfection of plants during a vegetation season. The simulator was successfully verified using independent data on the disease development from nine unprotected potato fields in the Netherlands and Germany. The average difference between the calculated and real yield losses did not exceed 5%. Using the simulator and weather data for a period of 2007-2017, yield losses were calculated for several areas of the Bryansk, Tambov, and Orenburg Regions of Russia. The results revealed differences in disease development between these regions and may be used to develop recommendations for a frequency of fungicide applications according to the regional risk of epidemics, leading to a significant reduction in fungicide use.
关键词: potato late blight Phytophthora infestans yield losses retrospective analysis mathematical model
Variable stiffness and damping magnetorheological isolator
Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 310-315 doi: 10.1007/s11465-009-0039-4
关键词: magnetorheological (MR) fluid stiffness damping mathematical model dynamic performance parameter identification
李玲,阮奇
《中国工程科学》 2008年 第10卷 第10期 页码 54-60
建立了带有冷凝水闪蒸的有固相析出的多效两段蒸发系统的常规设计数学模型,模型将系统的相平衡关系用回归式表达,使模型可以用计算机编程求解,避免了手工计算结合查相图的烦琐的计算过程;利用矩阵方程具有结构清晰和高度模块化的特点,将系统的物料衡算和热量衡算方程组写成矩阵方程的形式,只要保留或舍弃矩阵方程中的相关块矩阵,模型就能代表没有冷凝水闪蒸或没有固相析出的多效两段蒸发系统常规设计模型;采用迭代法结合矩阵法来求解模型,算例表明,冷凝水闪蒸对多效两段蒸发系统是有效的节能措施,算法收敛速度快、收敛稳定性好。
关键词: 固相析出 多效两段蒸发数学模型 冷凝水闪蒸
战兴群,张炎华,赵克定
《中国工程科学》 2000年 第2卷 第7期 页码 47-54
静液驱动二次调节技术是一项新型的液压传动技术。它具有控制方便、容易组成类似于电气系统的网络执行机构以及液压能回收与重新利用,甚至比电气系统更为简便等一系列突出的优点。二次调节技术的研究将极大地提高液压传动技术的应用范围和产品的竞争力。扭矩伺服加载系统是二次调节技术研究的一个典型装置,同时它也具有很好的应用背景。文章通过对二次调节加载装置全系统建模,分析了二次调节技术的一些内在动态特性,建立了二次调节扭矩加载计算机控制系统,用部分实验曲线验证了理论分析的正确性。
Accounting for local features of fouling formation on PHE heat transfer surface
Petro Kapustenko, Jiří J. Klemeš, Olga Arsenyeva, Olexandr Matsegora, Oleksandr Vasilenko
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 619-629 doi: 10.1007/s11705-018-1736-5
关键词: heat transfer fouling plate heat exchanger mathematical model
Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor
Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG
《化学科学与工程前沿(英文)》 2010年 第4卷 第4期 页码 461-471 doi: 10.1007/s11705-010-0517-6
关键词: syngas alcohol/ether fuel slurry catalyst bubble column slurry reactor global kinetics mathematical model
标题 作者 时间 类型 操作
Prediction of cutting force in turning of UD-GFRP using mathematical model and simulated annealing
Meenu GUPTA, Surinder Kumar GILL
期刊论文
Development of a hydrodynamic model and the corresponding virtual software for dual-loop circulating
Shanwei Hu, Xinhua Liu
期刊论文
Mathematical model and manufacture programming of loxodromic-type normal circular-arc spiral bevel gear
Zhenyun DUAN, Houjun CHEN, Zhilan JU, Jian LIU
期刊论文
Preparation of manganese (III) acetylacetonate nanoparticles via an environmentally benign route
M. S. Shalaby, H. Abdallah
期刊论文
Development and testing of a weather-based model to determine potential yield losses caused by potato
Alexey FILIPPOV, Maria KUZNETSOVA, Alexander ROGOZHIN, Olga IAKUSHEVA, Valentina DEMIDOVA, Natalia STATSYUK
期刊论文
Variable stiffness and damping magnetorheological isolator
Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI
期刊论文
Accounting for local features of fouling formation on PHE heat transfer surface
Petro Kapustenko, Jiří J. Klemeš, Olga Arsenyeva, Olexandr Matsegora, Oleksandr Vasilenko
期刊论文