广深线250km/h接触网运用1周年

通过对广深线２５０ｋｍ／ｈ接触网１年多的运行情况回顾，参考国外高速铁路先进技术，对我国未来的高速铁路接触网的一些主要技术问题提出了建议。     

浅析投标施工组织设计

通过论述投标施工组织设计的重要作用和特点，阐述了投标施工组织设计编制的要点，并提出了编制投标施工组织设计的几点建议。     

既有线提速路基检测评估技术

阐述既有线路基基床质量的检测评估方法及存在的问题,指出短时间内完善路基基床质量检测方法和评估标准的技术路线,并对路基的管理和提速评估模式提出了建议.     

OKT10在淋巴瘤及多发性骨髓瘤淋巴细胞的表达

本文利用OKT10检测了18例多发性骨髓瘤及35例恶性淋巴瘤患者外周血淋巴细胞,发现多发性骨髓瘤和非何杰金淋巴瘤患者OKT10阳性细胞均显著高于对照组,其改变与血清β_2微球蛋白水平无关。     

浅谈城市综合管沟设计方法

该文结合济南奥林匹克体育中心综合管沟工程,阐述了综合管沟的优点、设计原则、设计技术以及存在的问题和建议。     

粉喷桩施工质量控制要点

该文以惠青黄河特大桥回填路堤基层软化处理为实例,从粉喷桩施工准备、施工现场管理、监理管理、质量检验等各方面对粉喷桩施工中存在的问题及主要事项进行了详细论述。     

洽舍大桥加固方案的比较与选择

本文通过对洽舍大桥病害调查、分析及国内目前常见的几种加固方案的基本原理、优缺点比较,确定大桥最终推荐方案及其主要施工工艺介绍.     

激励力对水下加肋圆柱壳声振特性的影响

利用有限元和边界元方法,研究了激励力对水下加肋圆柱壳振动及声辐射特性的影响。首先分析了加肋圆柱壳受激后的水下声辐射,计算结果与实验值误差小于40%;然后在加肋圆柱壳端面圆心处和侧面母线中点处分别施加轴向、径向和切向的单位激励,讨论了不同位置各个方向的单位激励对水下加肋圆柱壳振动及声辐射的影响.结果表明:在端面圆心处受单位激励时,轴向激励比径向激励产生的振动及声辐射更强,在侧面母线中点处受单位激励时,激起的振动及声辐射,径向最高,切向次之,轴向最低。     

Numerical simulation of the spreading dynamic responses of the multibody system with a floating base

To simulate the dynamic responses of the multibody system with a floating base when the upper parts spread with a certain sequence and relative speed, the homogeneous matrix method is employed to model and simulate a four-body system with a floating base and the motions are analyzed when the upper parts are spread sequentially or synchronously. The rolling, swaying and heaving temporal variations are obtained when the multibody system is under the conditions of the static water along with the wave loads and the mean wind loads or the single pulse wind loads, respectively. The moment variations of each joint under the single pulse wind load are also gained. The numerical results showed that the swaying of the floating base is almost not influenced by the spreading time or form when the upper parts spread sequentially or synchronously, while the rolling and the heaving mainly depend on the spreading time and forms. The swaying and heaving motions are influenced significantly by the mean wind loads. The single pulse wind load also has influences on the dynamic responses. The torque of joint 3 and joint 4 in the single pulse wind environment may be twice that in the windless environment when the system spreads with 60 s duration.