小断面静压预制桩简易焊接接头试验研究     

张九香 《福建工程学院学报》2004,2(2):219-221

通过小断面静压预制桩简易焊接接头力学性能的室内试验和工程实践，验证小断面静压预制桩简易焊接接头在工程上应用的可行性。  相似文献   

Static load test and load transfer mechanism study of squeezed branch and plate pile in collapsible loess foundation     

GAO Xiao-juan WANG Jin-chang ZHU Xiang-rong 《浙江大学学报(A卷英文版)》2007,8(7):1110-1117

As a special geological phenomenon, the character of collapsible loess foundation is collapsible when penetrated by water. This character leads to the soil losing load bearing capacity largely and may lead to foundation failure. Pile is a popular foundation used in collapsible loess. The squeezed branch and plate pile is a new type of pile developed in recent years and has not be used in a project before. In this paper three squeezed branch and plate piles are tested in collapsible loess after immersion processing. The results may be used for reference in similar construction project, and to provide theoretical references for de- signing of the squeezed branch and plate piles in engineering practice.  相似文献   

基于有限元分析的纳米级微进给平台设计     

阎兵  田延岭  张大卫  张铁城 《天津工程师范学院学报》2003,13(1):1-4

设计了一种利用弹性铰链作为预紧机构、高精度滚动导轨作为导向机构的单PZT驱动的微进给平台。利用有限元方法对微进给平台的结构和静、动态特性进行了研究。在静态特性中着重分析了微进给平台的静态刚度,得出整个动平台的工作平面上的刚度分布图。在动态特性分析中着重研究了微进给平台的模态振型、固有频率和谐波激励响应,得出了激进给平台在动态激振力作用下的特性。最后分析了微进给平台工作平面上静态刚度和动态刚度变化很大的原因,并提出一些改进的措施。  相似文献   

钢筋混凝土预制方桩静压施工质量监理     

周继忠 《福建工程学院学报》2002,(2)

通过工程实践 ,提出钢筋混凝土预制方桩采用静力压桩施工质量监理工作方法  相似文献   

Exact Computation of Parallel Robot''''s Generalized Inertia Matrix     

赵永杰  杨志永  梅江平  黄田 《天津大学学报(英文版)》2005,11(6)

According to the definition of the new hypothetical states which have obvious physical sig-nificance and are termed as no-gravity static and accelerated states, a method for exact computa-tion of the parallel robot's generalized inertia matrix is presented. Based on the matrix theory, the generalized inertia matrix of the parallel robot can be computed on the assumption that the robot is in these new hypothetical states respectively. The approach is demonstrated by the Delta robot as an example. Based on the principle of the virtual work, the inverse dynamics model of the robot is formulized after the kinematics analysis. Finally, a numerical example is given and the element dis-tribution of the Delta robot's inertia matrix in the workspace is studied. The method has computational advantage of numerical accuracy for the Delta robot and can be parallelized easily.  相似文献   

静电场的描绘实验方法对比分析     

蒋逢春  彭君如 《商丘师范学院学报》2003,19(2):133-134

通过对静电场描绘实验两种方法的对比分析，指出其优缺点，并给出提高测量精度的方法。  相似文献   

有机静电感应三级管动作特性的实验分析     

薛严冰  王东兴 《上海大学学报(英文版)》2006,10(4):352-356

1 Introduction Organic semiconductors are receiving considerableattention due to their remarkable advantages especiallyvarious manufacturing methods ,lowcost and plentifulmaterials .Ebisawa ,et al.[1]fabricated the first poly-mer-based transistor in 1983 . Since then,lots of re-search works have been done in the filed of organicmaterial-based transistors .It was reported that organicthin-fil m transistor ( OTFT) fabricated by usingorganic semiconductor material copper-phthalocyanine(CuPc)[2…  相似文献   

静态变量与静态数据成员     

吴集林 《广东广播电视大学学报》2003,12(1):81-83

本文从作用域和生命周期的角度解析了静态全局变量、静态局部变量、静态数据成员的含义，指出了它们本质上的特点和区别。  相似文献   

数学与物理学相融合的新趋势     

王贵保 《保定师专学报》2002,15(2):20-22

对近年来数学各领域之间、数学与物理之间的相互影响再次活跃,并相互作用及产生的重要成果进行了讨论,同时强调了数学的统一性。  相似文献   

石门台山顶矮林的静态生命表及存活曲线     

尹爱国  刘宏辉  占卫国 《茂名学院学报》2004,14(3):23-26

根据山顶矮林各优势种的大小结构图、静态生命表及存活曲线，并对存活曲线进行线性回归，红锥属于稳定的种群，疏齿木荷、五列木、密花树扣木荷的存活曲线仍代表增长型种群，并且都属于基部宽而顶部窄的金字塔结构，中间也没有缺失现象。  相似文献