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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： continuous welded rail double-inclined welding surface bearing capacity regularity

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 superplasticity, 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.

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

The analysis of the bending stiffness and intensity of cylindrical tubes

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Science China(Technological Sciences) 2007年第3期50卷 268-278页

作者： song yuquan GUAN ZhiPing NIE YuQin GUAN XiaoFang Superplastic and Plastic Research Institute Jilin UniversityChangchun 130025China Department of Engineering Mechanics Institute of Mechanical Science and EngineeringJilin UniversityChangchun 130025China

Based on the mechanics of material,the bending stiffness and intensity of cylin-drical bar and tube are analyzed. By comparing the cylindrical tube whose ratio of outside diameter to internal diameter is 0.7 with the cylindrical bar,it is concluded that when both of them have the same mass,the section stiffness of the cylindrical tube is three times that of the cylindrical bar;when both of them have the same external diameter,the mass of the cylindrical tube is only 1/2 that of the cylindrical bar,but the section stiffness of the cylindrical tube is 3/4 that of the cylindrical bar. By virtue of the elemental elastic-plastic theory,the yield stress of the liquid-filled cylindrical tube is investigated. Due to the incompressibility of liquid and the strain hardening effect of material,the yield stress of the liquid-filled tube is enlarged compared with the hollow tube,thus raising its bending intensity. Under the dy-namic load,compared with the hollow tube,the impact resistance of the liquid-filled tube is also raised due to elastic recovery. Because the hydraulic pressures per-pendicular to the inner surface are identical everywhere,the local stress concen-tration resulting from the ovalisation of the tube would be decreased,and the re-sistance to buckling would be improved.

关键词： bending of cylindrical tube liquid filled stiffness intensity

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乙唑螨腈与不同桶混助剂增效作用探索

农药 2024年第2期63卷 152-156页

作者：刘少武张俊龙赖先文宋玉泉常秀辉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 中化作物保护品有限公司上海200240

[目的]为探究乙唑螨腈与桶混助剂的混用效果,开展了乙唑螨腈与6种不同助剂的混配研究。[方法]采用喷雾法测定了乙唑螨腈与不同助剂混配的室内联合作用效力和田间防效。[结果]试验结果表明,乙唑螨腈分别与6种不同桶混助剂混配后,均表现... 详细信息

[目的]为探究乙唑螨腈与桶混助剂的混用效果,开展了乙唑螨腈与6种不同助剂的混配研究。[方法]采用喷雾法测定了乙唑螨腈与不同助剂混配的室内联合作用效力和田间防效。[结果]试验结果表明,乙唑螨腈分别与6种不同桶混助剂混配后,均表现出相加或增效作用。[结论]通过室内混配试验,推荐乙唑螨腈与有机硅类桶混助剂浩卓、功倍笑混配施用(1∶3),推荐乙唑螨腈与油类桶混助剂绿颖混配施用(1∶1);田间药效试验结果表明,乙唑螨腈与浩卓、功倍笑混配施用,速效性和持效性均优于单剂处理和对照药剂。

关键词：乙唑螨腈桶混助剂室内生物活性田间防效

Quantitative determination of homogeneous strain value in superplastic tension

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Chinese Science Bulletin 2002年第17期47卷 1488-1492页

作者： yuquan song Shumei Liu Lei Hou Jilin Univ Superplast & Plast Res Inst Changchun 130025 Peoples R China

After load instability, a passage of homogeneous strain e can be still continued in superplastic tensile deformation. But untill now, no one has given the precise value of e corresponding to actual materials, neither in experimental measurements nor in theoretical calculations. Using the elaborate experimental measuring methods of m value and its function expressions, the note first gives the method to determine homogeneous e, and the homogeneous ε value of typical superplastic alloy Zn-5% Al under 18°C and 340°C respectively.

关键词： superplastic tension load instability homogeneous strain.

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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

维普期刊数据库博看期刊

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

20%乙唑螨腈·螺虫乙酯悬浮剂干燥挥发性及杀螨活性

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农药 2024年第9期63卷 648-652页

作者：遇璐田大军潘强胡伟宋玉泉吴元华丑靖宇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 沈阳农业大学植物保护学院江苏扬州225009 江苏扬农化工股份有限公司沈阳110866

[目的]制备不同配方20%乙唑螨腈·螺虫乙酯悬浮剂,研究药液的喷雾干燥挥发性能及杀螨活性。[方法]采用高通量农化配方制备和筛选系统,制备不同配方样品并测其粒径,表征其干燥过程挥发度,开展制剂样品对朱砂叶螨室内杀螨活性试验,考察不... 详细信息

[目的]制备不同配方20%乙唑螨腈·螺虫乙酯悬浮剂,研究药液的喷雾干燥挥发性能及杀螨活性。[方法]采用高通量农化配方制备和筛选系统,制备不同配方样品并测其粒径,表征其干燥过程挥发度,开展制剂样品对朱砂叶螨室内杀螨活性试验,考察不同配方干燥挥发性能的变化及对应杀螨活性。[结果]20%乙唑螨腈·螺虫乙酯悬浮剂L1-11配方D_(50)为230 nm,干燥挥发性表征mDE_(t90)约9 min,其对朱砂叶螨的防效最优,LC_(50)为0.7270 mg/L。[结论]制备不同配方体系,通过对药液粒径、干燥挥发性及喷雾粒径性能的对比研究,初步探寻了20%乙唑螨腈·螺虫乙酯悬浮剂药液喷雾干燥挥发性与杀螨活性的对应关系,从而获得了杀螨活性明显优异于原药混配的制剂配方。

关键词：乙唑螨腈·螺虫乙酯悬浮剂挥发性杀螨活性