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不同刚度圆柱振子涡激振动数值模拟

中国海洋大学学报（自然科学版） 2024年第9期54卷 133-140页

作者：宋玉泉谭俊哲袁鹏司先才杜修茂李昌明中国海洋大学工程学院山东青岛266100 中国海洋大学山东省海洋工程重点实验室山东青岛266100 中国海洋大学青岛市海洋可再生能源重点实验室山东青岛266100

为了研究不同刚度涡激振动系统对圆柱振子振动特性的影响,本文建立了单自由度涡激振动系统的仿真模型,采用计算流体力学(CFD)方法并结合重叠网格技术进行数值模拟。通过与公开发表的文献数据进行对比,验证了模型的精度和方法的可靠性。... 详细信息

为了研究不同刚度涡激振动系统对圆柱振子振动特性的影响,本文建立了单自由度涡激振动系统的仿真模型,采用计算流体力学(CFD)方法并结合重叠网格技术进行数值模拟。通过与公开发表的文献数据进行对比,验证了模型的精度和方法的可靠性。本文对时变流速下圆柱振子的振幅响应、频率响应和尾涡特征的变化情况进行了详细分析。仿真结果表明:当圆柱振子的振幅随流速的改变而降低时,调整弹簧刚度的大小,可使其保持较大的无量纲振幅和振动频率,并使尾流脱落旋涡之间的间距增大,且脱落模式由“2S”模式变为“2P”模式。

关键词：涡激振动弹簧刚度计算流体力学重叠网格圆柱振子

新型乙烯基吡唑丙烯腈类化合物的合成及杀螨活性

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农药 2024年第5期63卷 325-329页

作者：张斌杨辉斌常秀辉宋玉泉李斌汪国庆沈阳科创化学品有限公司沈阳110144 沈阳中化农药化工研发有限公司新农药创制与开发国家重点实验室农药国家工程研究中心沈阳110021

[目的]为了发现结构新颖的杀螨活性化合物。[方法]以腈吡螨酯为先导化合物,在丙烯腈结构中引入乙烯基吡唑结构片断,设计合成了15个新型乙烯基吡唑丙烯腈类化合物,并对其进行杀螨活性测试。[结果]初步的室内生物活性测试结果表明:目标化... 详细信息

[目的]为了发现结构新颖的杀螨活性化合物。[方法]以腈吡螨酯为先导化合物,在丙烯腈结构中引入乙烯基吡唑结构片断,设计合成了15个新型乙烯基吡唑丙烯腈类化合物,并对其进行杀螨活性测试。[结果]初步的室内生物活性测试结果表明:目标化合物6a~6h均表现出较好的杀螨活性,在100 mg/L质量浓度下对朱砂叶螨致死率均≥99%。其中化合物6 g表现最佳,在10 mg/L下对朱砂叶螨致死率仍为88%。[结论]当羟基上的H被烷基羰基、烷氧基羰基取代时,化合物具有较好的杀螨活性。

关键词：乙烯基吡唑丙烯腈合成杀螨活性

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氯虫苯甲酰胺类似物的设计、合成及杀虫活性

农药 2024年第7期63卷 483-487,493页

作者：英君伍李雪松宋玉泉王刚李斌杨辉斌沈阳中化农药化工研发有限公司新农药创制与开发国家重点实验室农药国家工程研究中心沈阳110021

[目的]寻找具有较高杀虫活性的新化合物。[方法]以取代的邻氨基苯甲酸和取代的4,5-二氢吡唑酸为起始原料,合成了10个氯虫苯甲酰胺类化合物。化合物结构经1H NMR确证。[结果]初步活性测试结果显示,在10 mg/L剂量下,部分化合物对小菜蛾和... 详细信息

[目的]寻找具有较高杀虫活性的新化合物。[方法]以取代的邻氨基苯甲酸和取代的4,5-二氢吡唑酸为起始原料,合成了10个氯虫苯甲酰胺类化合物。化合物结构经1H NMR确证。[结果]初步活性测试结果显示,在10 mg/L剂量下,部分化合物对小菜蛾和黏虫具有优异的杀虫活性。[结论]化合物VI-1对小菜蛾的活性优于对照氯虫苯甲酰胺。

关键词：氯虫苯甲酰胺合成杀虫活性

Development of self-adjusting hydraulic machine for combination forming of upsetting and extruding

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Science China(Technological Sciences) 2009年第9期52卷 2785-2790页

作者： song yuquan WANG MingHui GUAN XiaoFang Superplasticity and Plasticity Research Institute Jilin UniversityChangchun 130022China

In the paper a self-adjusting hydraulic machine for combination forming of upsetting and extruding is systematacially presented in terms of mechanical principle, design principle, machine construction, design of the key components and working routine. The machine is designed with the following features: The lower movable beam is adjusted by the ejecting cylinder, the upper upsetting beam is reset by the backstroke slide rods, and the upsetting cylinders communicate with the gas-liquid accumulators. These features make the machine conformation compact, save both the backstroke cylinder of the upper upsetting beam and the upsetting cylinder of the lower movable beam, and simplify the hydraulic system. Furthermore, the machine can resolve such problems as incomplete filling at the addendum position, microcracks at the dedendum position, greater force and lower die life during precision forging of spur gears.

关键词： compound hydraulic machine upsetting extruding

Static mechanics analysis of no bumping no vibration welding structure with double-inclined surface for high-speed & heavy-load CWR

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Science China(Technological Sciences) 2011年第3期54卷 603-609页

作者： song yuquan WANG MingHui song JiaWang Superplasticity and Plasticity Research Institute Jilin University Changchun 130022 China

It is known from our former theoretical analysis that the single-inclined welding surface which is inclined towards the transverse direction of the rail can only eliminate vertical bumping, and the single-inclined welding surface which is inclined towards the vertical direction of the rail can only eliminate lateral vibration. In this paper, we put forward a welding structure of double-inclined welding surface to eliminate the vertical bumping and lateral vibration at the same time, and analyze the stress state of continuous welded rail (CWR) by combining geometrical azimuth. Furthermore, the increase of bearing capacity of CWR with the double-inclined welding surface is theoretically analyzed.

关键词：焊接结构无碰撞静力学分析双斜面震动垂直方向横向振动应力状态

Precision forming machine with rolling plate cross wedge rolling

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Science China(Technological Sciences) 2009年第10期52卷 3117-3121页

作者： song yuquan LI ZhiGang WANG MingHui GUAN XiaoFang Superplasticity and Plasticity Research Institute Jilin UniversityChangchun 130022China

Roller cross wedge rolling(CWR)machines have high rigidity, but sector dies are difficult to process. Plate CWR machines have low rigidity and need large floor space, but plate dies are easy to process. Neither roller CWR machine nor plate CWR machine can produce larger workpieces. Based on the above conclusions, this paper presents the mechanical principle of the precision forming machine with rolling plate CWR. Then, its design principle and machine construction are presented. There are a top press roller above the upper sliding plate and a bottom press roller under the lower sliding plate. The press rollers make rolling contact with the sliding plates. The plate dies are mounted on the upper and lower sliding plates, respectively. Furthermore, the axes of both press rollers and centerline of work-piece always keep in the identical vertical plane during forming process. These make the machine retain advantages of high rigidity for roller CWR machine and simpleness of manufacturing dies for plate CWR machine, and abandon defects of poor rigidity for plate CWR machine and difficulty of manufac-turing dies for roller CWR machine. Moreover, the machine can produce larger workpieces.

关键词： roller cross wedge rolling plate cross wedge rolling compound cross wedge rolling

Mechanical analysis of temperature impact on stability during superplastic tensile deformation

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Science China(Technological Sciences) 2006年第6期49卷 641-654页

作者： song yuquan GUAN Zhiping WANG Minghui song Jiawang Superplastic and Plastic Research Institute Jilin University Changchun 130025 China Superplastic and Plastic Research Institute Jilin University Changchun 130025 China Superplastic and Plastic Research Institute Jilin University Changchun 130025 China Superplastic and Plastic Research Institute Jilin University Changchun 130025 China

Based on state equation that stress is the function of strain, strain-rate and temperature, the paper establishes the differential constitutive equation used for analyzing load-stability and the variational constitutive equation used for analyzing geometry-stability during superplastic tensile deformation, which contain strain hardening index, strain-rate sensitivity index, temperature sensitivity index introducted for the first time and temperature undulation index introducted for the first time in the paper. And then, based on the universal condition of plastic elementary theory, the paper analyzes load-stability and geometry-stability under continuously rising temperature and under the non-uniform temperature along the axes of specimen respectively. The results prove the impact of continuously rising speed and non-uniform value of temperature on deformation stability is that the faster temperature rises and the more non-uniform temperature is, the smaller the corresponding uniform strain of load-stability and geometry-stability are; strain hardening index is the necessary condition of stability during superplastic tensile deformation, and geometry-instability will not happen when load-instability occurs, but happen when uniform deformation has lasted after load-instability; in the superplastic temperature field, constant temperature is not necessary condition of superplasticitiy, but during the deformation, the slower temperature rises and the more uniform temperature is, the more stable deformation is.

关键词： superplasticity, temperature, tensile deformation, stability.

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喹唑啉酮类似物的设计、合成及杀虫活性研究

世界农药 2024年第8期46卷 28-34页

作者：王刚梁爽宋玉泉英君伍李斌于海波杨辉斌沈阳中化农药化工研发有限公司新农药创制与开发国家重点实验室农药国家工程研究中心沈阳110021

Pyrifluquinazon是Nihon Nohyaku公司开发的喹唑啉酮类杀虫剂。以邻氨基苄醇和杂环硼酸为起始原料经8步反应合成了11个喹唑啉酮类似物,其结构经1H NMR及HRMS确证。杀虫活性测试结果表明:喹唑啉酮类似物在100 mg/L对蚕豆蚜具有优异活性,... 详细信息

Pyrifluquinazon是Nihon Nohyaku公司开发的喹唑啉酮类杀虫剂。以邻氨基苄醇和杂环硼酸为起始原料经8步反应合成了11个喹唑啉酮类似物,其结构经1H NMR及HRMS确证。杀虫活性测试结果表明:喹唑啉酮类似物在100 mg/L对蚕豆蚜具有优异活性,其中化合物9-4、9-5、9-7对在蚕豆蚜的活性为100%,优于对照化合物pyrifluquinazon的91.9%。

关键词：喹唑啉酮合成杀虫活性

Theoretical and metrical standardization of strain rate sensitivity index

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Science China(Technological Sciences) 2007年第6期50卷 714-735页

作者： song yuquan GUAN ZhiPing LI ZhiGang WANG MingHui Superplastic and Plastic Research Institute Jilin University Changchun 130022 China Superplastic and Plastic Research Institute Jilin University Changchun 130022 China Superplastic and Plastic Research Institute Jilin University Changchun 130022 China Superplastic and Plastic Research Institute Jilin University Changchun 130022 China

Strain rate sensitivity index m is one of the vital mechanical parameters for deter- mining material superplasticity. In this paper, the existing formulae for measuring m value are reviewed, and it is found that the m values can be classified into three classes: mi under constant length, mv under constant velocity, and mP under con- stant load. The constraint equation of the generalized m value is established ac- cording to the tensile constitutive equation and the basis theory for plastic me- chanics. Based on three typical deformation paths, the m value is redefined. Fur- thermore, from the formula of generalized m value, the formulae for measuring mi, mv and mP are theoretically deduced. The precise methods with numerical simula- tion are presented. The results prove that the m value is a non-constant and its dependence on ε changes with the deformation path. Under different deformation paths, the m values calculated from the same formula are different. Using different formulae, the m values under the same deformation path are also different. There- fore, deformation path and corresponding formula should be given during the measurement of the m value. Moreover, it is explained theoretically and experi- mentally that why the mv value under constant velocity is sometimes negative but the mP value under constant load is sometimes lager than 1. The aim of the analysis and measurement of the m value is to facilitate the study on the relationship be- tween macroscopical mechanical laws and microscopic physical mechanisms during superplastic deformation.

关键词： superplasticity, strain rate sensitivity index, tensile deformation