排序方式： 共有85条查询结果，搜索用时 15 毫秒
71.
针对在一般填充墙框架的抗震设计中忽略填充墙的抗侧刚度对实际结构的影响进行了探讨，定性推导出了一般规律，并且同时考虑了填充墙的影响，得出了比较客观的结论． 相似文献
72.
张帆 《浙江大学学报(A卷英文版)》2004,5(5):558-566
This paper provides theoretical foundation for the problem of localization in multi-robot formations. Sufficient and necessary conditions for completely localizing a formation of mobile robots/vehicles in SE(2) based on distributed sensor networks and graph rigidity are proposed. A method for estimating the quality of localizations via a linearized weighted least-squares algorithm is presented, which considers incomplete and noisy sensory information. The approach in this paper had been implemented in a multi-robot system of five car-like robots equipped with omni-directional cameras and IEEE 802.11b wireless network. 相似文献
73.
李戎 《襄樊职业技术学院学报》2004,3(4):14-16
建立了爆破震动作用下，底层框架砌体结构的时非线性程分析方法。利用某水电站地下厂房开挖爆破的地震波．对其周边的一栋五层底层框架砌体结构，进行了实例分析，通过与构造地震波作用下结构的动力反应进行了对比，对其安全性进行了评估。 相似文献
74.
刘榕 《赣南师范学院学报》2001,(6):98-100
本文介绍了北京八角小区 3#塔楼的设计情况 ,结合工程实例对剪力墙的厚度 ,连梁 ,圈梁、箱基暗柱的设置等问题进行探讨 . 相似文献
75.
应用有限单元法对电机换向抽油机支架进行了静态分析，计算了其静强度和刚度。结果表明：设计的支架结构及选材能够满足强度和刚度要求，但安全余量大。利用优化设计模块对支架进行了优化设计，结果改用14号等边角钢代替原主弦杆用钢。并经有限元再分析，证明：优化后的支架仍能满足工况要求，且减轻了重量，降低了制造成本。 相似文献
76.
Extensive research has shown that externally bonded carbon fiber reinforced polymer (CFRP) laminates are particularly suitable for improving the fatigue behavior of reinforced concrete (RC) beams. This paper presents the research on flexural rigidity evolvement laws by testing 14 simple-supported RC beams strengthened with carbon fiber laminates (CFL) under cyclic load, and 2 under monotone load as a reference. The cyclic load tests revealed the peak load applied onto the surface of a supported RC beam strengthened with CFL is linear to the logarithm of its fatigue life, and the flexural rigidity evolvement undergoes three distinct phases: a rapid decrease from the start to about 5% of the fatigue life; an even development from 5% to about 99% of the fatigue life; and a succedent rapid decrease to failure. When the ratio of fatigue cycles to the fatigue life is within 0.05 to 0.99, the flexural rigidity varies linearly with the ratio. The peak load does not affect the flexural rigidity evolvement if it is not high enough to make the main reinforcements yield. The dependences of the flexural rigidity of specimens formed in the same group upon their fatigue cycles normalized by fatigue life are almost coincident. This implies the flexural rigidity may be a material parameter independent of the stress level. These relationships of flexural rigidity to fatigue cycles, and fatigue life may be able to provide some hints for fatigue design and fatigue life evaluation of RC member strengthened with CFL; nevertheless the findings still need verifying by more experiments. 相似文献
77.
结构矩阵分析中,经常利用高斯消元法来求解未知位移,一般认为高斯消元仅为一种数学过程,而实际其包含着深刻的物理意义.高斯消元法求解方程包括消元和回代两个过程,消元的物理意义为原结构的未知自由度逐步转化为子结构内部自由度,而得到新结构的过程;回代的物理意义为子结构内部自由度逐步释放回到总体结构,最终还原为原结构的过程. 相似文献
78.
任晓 《浙江工贸职业技术学院学报》2011,11(1):1-4
在多数情形下市场价格未能在短期内依照古典供求规律的要求对失衡的供求迅速做出反应,会存在"不可思议"的调整刚性。原因在于价格调整是有成本的。本文就价格调整中存在的成本作简要分析,并结合文献中有代表性的观点作简要的回顾和评论。 相似文献
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INTRODUCTION In order for a team of mobile robots to navigateautonomously in some desired formations and fur-ther perform cooperative tasks, such as surveillanceand target acquisition, they must be able to localizethemselves in the formation as well as in a globalreference frame (Belta and Kumar, 2001; Das et al.,2002). Therefore, how to estimate the robots’po-sitions and orientations (poses) in a precise andefficient way is of particular interest. Our interestwas in localizing a team o… 相似文献
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