环形容器接管环带区球壳侧应变场在线性条件下的工程估算研究

本文用电测法对３台带接管的球形容器（两台带正交接管，一台带切向接管）接管环带区的应变进行了测试，对应变分布进行了分析。认为球形容器接管环带区的峰值应变位于离焊缝较近的球壳侧，且峰值应变和压力具有线性关系。在线性条件下，对球壳侧应变的工程估算进行了探测，得出的试验式可供压力容器安全评定时参考。     

接管环带区应力应变场的工程估算方法研究

本文实验测定了容器一接管联接处角焊缝区域（环带区）的应力集中系数，并与目前国内外几种主要的高应变区应力集中系数工程估算方法作了比较分析，还用实测值验证了ＣＶＤＡ－８４规范中采用的峰值应变近似计算方法。结果表明：曾广欣公式在屈服区有限情况下有效性良好，但在大范围屈服的情况下需作一定的修正。     

具有容器接管高应变区应变场特征的一种十字形试板

设计了一种承受双向载荷的十字形试板,以满足压力容器接管连接结构处疲劳性能研究的需要。通过有限元应力分析及电阻应变片测量,两者结果有较好的一致性,同时证明该试板具有压力容器接管连接处的应变分布特征:高应变峰值、高应变梯度及周围被广大弹性区包围。     

按管环带区应力应变场的工程估算方法研究

本文实验测定了容器－接管联接处角焊缝区域（环带区）的应力集中系数，并与目前国内外几种主要的高应变区应力集中系数工程估算方法作了比较分析，还用实测值验证了ＣＶＤＡ－８４规范中采用的峰值应变近似计算方法。结果表明：曾广欣公式在屈服区有限情况下有效性良好，但在大范围屈服的情况下需作一定的修正。     

大型混合式球形容器球壳板设计

在承接广西钦州 4台 2 0 0 0m3液化石油气球罐的设计、制造中 ,通过对 2 0 0 0m3球形容器桔瓣式与混合式结构形式各参数的比较 ,认为 :大型球形容器设计中采用混合式结构形式 ,在支柱数与桔瓣式结构形式相同的情况下 ,混合式结构形式具有结构新颖 ,材料利用率高 ,焊缝总长减少等诸多优点。 4台 2 0 0 0m3球罐一次性节约钢材 1 66吨 ,产生直接经济效益 66.4万元     

接管高应变区断裂评定工程方法及失效评定曲线的研究

采用三段幂次法则和ＥＰＲＩ弹塑性Ｊ积分工程估算方法，推导得到了１６ＭｎＲ材料的接管高应变区二维模型分段弹塑性Ｊ积分工程估算公式，同时运用有限元方法进行了计算，在此基础上建立了高应变区的失效评定曲线ＦＡＣ，得到了该曲线的３大特征，并指出选择１曲线的不足。     

高压球形容器强度的可靠性分析

采用有限元分析软件ANSYS,对高压球形容器进行有限元分析,并基于计算结果对该压力容器的可靠性及参数敏感性进行分析和评价,为化工设备强度的可靠性设计提供有益的参考。     

夹套容器平齐接管在温差作用下的疲劳分析

对气化炉夹套平齐接管处的温差应力进行了有限元分析计算，并对内筒温度的变化引起的疲劳问题进行了分析研究，按照分析设计标准ＪＢ４７３２－９５进行了疲劳强度评定， 了的结论对类似的设计有参考价值。     

球形封头接管结构的安全评定与优化

球形封头开孔接管结构是压力容器常用结构之一,由于在封头与接管连接区域会产生应力集中,是压力容器失效的源头。基于ANSYS软件中的APDL语言建立了球形封头与接管连接结构的有限元模型,对该结构在内压和管道外载荷作用下进行了强度分析,并基于JB 4732标准对其进行安全评定,结果发现接管N2与球形封头连接区域的应力不能满足强度要求。基于此,提出了满足强度要求的优化结构,为工程上此结构的设计提供了一定参考依据。     

容器斜接管区应力状态的研究

以直径６００ｍｍ、具有两个斜接管的容器为模型，进行了内压作用下的应力测试，并用高精度壳单元的柱壳相贯程序进行了详细计算，得到了容器斜接管区的应力分布规律。同时，从实验数据和ＳＡＰ程序的计算对比中验证了柱壳相贯程序，可用于工程计算     

接管轴向推力作用下圆柱形壳体开孔—接管区局部应力的研究

本文对接管轴向推力作用下圆柱形压力容器开孔一接管高应变区的变形及局部应力进行了详细的试验研究和三维有限元分析。研究工作针对３台具有不同ｄ／Ｄ比的试验容器进行。研究结果表明，应力和变形具有明显的局部性，其最大应力出现在容器的横向截面内（θ＝９０°），并将本文的研究结果与ＷＲＣ．１０７及ＷＲＣ．２９７的计算结果进行了比较。     

接管环带区表面裂纹疲劳扩展规律的研究

在实物容器疲劳试验的基础上，采用按形变功率定义求得的循环Ｊ积分幅度ΔＪ来描述接管环带区表面裂纹的疲劳扩展速率，并提出了计算表达式。结果表明，在高应变情况下，ΔＪ是一个有效的疲劳控制参量，经修正后的ΔＪｅｆ能较好地描述环带区表面裂纹疲劳扩展规律     

电场作用下冷态单气泡形成过程

对氮气泡在电场作用下的形成过程进行了可视化研究。实验观察到电场作用下气泡生长的动态图像;研究表明,电场作用下气泡沿场强方向伸长,随着场强的升高,气泡的脱离长径比增大,脱离体积减小;另外利用Matlab编程从实验中取得实际气泡生长的轮廓线,对气泡界面的电应力计算显示,气泡顶部受到电拉力作用,两侧受电压力作用,从而使气泡产生了沿场强方向的伸长变形。这表明气泡界面受到的电应力是气泡产生变形的主要原因,该结果有助于电场对沸腾传热强化机理的研究。     

Experimental study of fire growth and ejected plume in a cross‐ventilation compartment under wind condition

In this study, a set of reduced‐scale experiments were conducted to study the influence of external wind on the fire growth and ejected plume in a compartment with two openings. The approaching wind velocity was set as 1.5 and 3.0 m/s, respectively. The temperatures in the fire compartment were also measured by thermocouple matrixes. The images of the projected flames from the opening and the fuel mass loss rate were recorded by digital video and electronic balance, respectively. It is observed that the wind with velocity of 1.5 m/s can reduce the combustion severity by decreasing the ventilation in the fire room and enhance the duration time of combustion. On the contrary, the wind with velocity of 3 m/s can promote the combustion severity by increasing the ventilation in the fire room and reduce the duration time of combustion. The theoretical analysis shows how the external wind that coupled with the thermal buoyance influence the ventilation of the compartment, and a critical velocity or a dimensional number are suggested to predict the ventilation of the fire room, which is believed to influence the compartment fire behavior greatly.     

A comparative study of particle size analysis in fine powder: The effect of a polycomponent particulate system

We report the particle size distribution of poly component particulate systems studied in three kinds of experimental methods. Six analyzers, such as Mastersizer Microplus (Malvern Instruments Ltd., UK), LS230 (Coulter Electronics Ltd., USA) LMS30 (Seishin, Japan), Analysette22 (Fritsch, Germany), HELOS (Sympatec, Germany) based on a laser diffraction and scattering method, and the SKC-2000S (Seishin Co., Ltd., Japan) based on the centrifugal sedimentation method, were used to study the particle size distribution. The results do not show reasonably good agreement between the different analyzers and different sample systems. There is a discrepancy regarding the absolute values, which can be explained by the fact the techniques used are based on different measuring principles. The results of the present study reflect that the investigator must carefully select the particle size analyzer for a particular application. Therefore, we suggest that it is necessary to measure the particle size distribution by using at least two types of analyzers or more of different makers.     

The Effect of 7 H -Dibenzo[ c,g ]carbazole and Benzo[ a ]pyrene Mixture on DNA Adduct Formation in Strain A/J Mouse Model: Preliminary Report

Complex mixtures consist of homocyclic and heterocyclic polycyclic aromatic compounds (PACs) represented by benzo[ a ]pyrene (B a P) and 7 H -dibenzo[ c,g ]carbazole (DBC), respectively. To exert their biological effects, PACs are metabolized into reactive intermediates, which can form DNA adducts. In this preliminary report, male A/J mice were given a single intraperitoneal injection. Groups of three animals were treated with DBC (2 or 10 mg/kg) or B a P (10 or 100 mg/kg). Mixtures of DBC:B a P were given at doses of 2:10, 2:100, 10:10, or 10:100 mg/kg. DNA adduct levels in lungs collected three days posttreatment were determined by the 32 P-postlabeling method. The results indicate that, in the lungs, exposure to mixtures containing more B a P than DBC resulted in the absence of adduct 3 (DBC) and significantly higher total adduct levels. This suggests that B a P is being preferentially metabolized, resulting in less DBC adduction.