地下建筑结构中弹性地基直梁的初参数法

以文克尔假定推导了弹性地基梁挠度曲线微分方程,并导出地基梁在不同荷载作 用下梁截面的挠度ｙ、转角θ、弯矩Ｍ和剪力Ｑ的计算公式．用初参数法获得基本方程 的解．所得到的计算公式适用于大多数的弹性地基短梁,用此公式可达到令人满意的结果．     

兰姆移动测量的激光共振法

介绍兰姆移动测量的一种重要方法——激光共振法,它可用来测量氢原子的兰姆移动,也可用来测量类氢离子的兰姆移动,而对后者射频共振法是无法实现的。     

Damage assessment of a continuous beam bridge based on the strain mode

1. Introduction In the structural damage identification, the confirmation of parameters sensitive to damage is the foremost, namely to decide what parameters are to be adopted, the next is to distinguish damaged from undamaged, and to determine the position and severity of damages. For local damage, an identifying parameter should be a local quantity and accord the following 4 basic conditions: 1) it is sensitive to local damages and is a monotone function depicting the severity of structural …     

无取向硅钢片非常规处理工艺的探讨

本文探讨了平整和退火处理工艺对不同成分、不同工艺生产的成品硅钢片磁性能的影响，并得出中低牌号硅钢经平整和退火毡理后磁性能改善显著的结论。     

确定轴向运动梁固有频率的多尺度法

The natural frequencies of an axially moving beam were determined by using the method of multiple scales. The method of second-order multiple scales could be directly applied to the governing equation if the axial motion of the beam is assumed to be small. It can be concluded that the natural frequencies affected by the axial motion are proportional to the square of the velocity of the axially moving beam. The results obtained by the perturbation method were compared with those given with a numerical method and the comparison shows the correctness of the multiple-scale method if the velocity is rather small.     

哑铃型钢管混凝土拱桥的面内弹塑性分析

本文采用非线性有限元方法对哑铃型钢管混凝土拱桥进行面内弹塑性分析．以解放大桥的中孔拱桥为研究对象,分别考虑了施工阶段和成桥阶段的受力情况,计算了该桥在施工和成桥阶段的弹塑性稳定安全系数,并讨论了不同程度的初始挠度对弹塑性稳定安全系数的影响。分析结果可供哑铃型截面钢管混凝土拱桥的设计建设参考。     

高职院校钢结构教学的几点思考

从职业教育的培养目标和目前钢结构的发展要求出发,探讨了钢结构教学,诸如:关注钢结构的发展,适当压缩理论教学学时、加强实践环节,采用现代化的教学手段,加强双师型教师的培养等,以使钢结构教学能够适应当前建筑市场的要求,培养出受欢迎的钢结构人才。     

影响锌钙系磷化液性能的几个因素

从温度、酸度、磷化时间、添加剂、前处理等方面研究了中温锌钙系磷化液的影响因素，并将在各种不同条件下所制得的磷化膜的外观、耐蚀性、附着力等性能加以比较、测定，找到了最佳磷化条件。     

Influences of Randomly Distributed Wall THickness of Beverage Can on Its Strength and Stiffness

This paper describes the research undertaken on the strength and stiffness of fluctuation on the wall thickness of steel beverage cans using the Monte-Carlo stochastic finite element method.Sample distributions were firestly assumed and then proven using the data observations of the wall thickness.the APDL language was then applied,and the stresses and displacements of the can were calculated by using the ANSYS software.It is concluded that the structureal reliability of a steel-making beverage can be estimated accurately.     

不锈钢锅筒破裂成因浅析

某市一台运行中的全不锈钢小型汽水两用锅炉,定期检验试压时发现锅筒出现裂纹,为探究其成因,通过进行综合性检验评定,采用高倍电子显微镜对裂纹形貌,特征及晶界进行了分析,从而给产品监检,制造生产部门提供一些有意义的参考意见。