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Instantaneous deflection of light-weight concrete slabs
Behnam VAKHSHOURI, Shami NEJADI
《结构与土木工程前沿(英文)》 2017年 第11卷 第4期 页码 412-423 doi: 10.1007/s11709-017-0416-8
关键词: instantaneous deflection light-weight concrete expanded polystyrene effective moment of inertia cracking moment moment capacity service moment
Improved prediction of pile bending moment and deflection due to adjacent braced excavation
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0961-2
关键词: pile responses excavation prediction deflection bending moments
On the location of the secondary instantaneous poles in two-degree-of-freedom spherical mechanisms
Soheil ZARKANDI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 34-40 doi: 10.1007/s11465-014-0290-1
As the instant centers in planar mechanisms, the instantaneous poles (or instant poles, in brief) can be used for kinematic analysis in spherical mechanisms. One of the mandatory steps in this analysis is the determination of the location of these poles. This paper presents a theorem showing analytically that the locus of an unknown secondary instant pole in two-degree-of-freedom (2-DOF) spherical mechanisms is a great circle (GC). The exact location of the pole on its GC is obtained based on the configuration of the mechanism and velocity ratio of the two inputs. Moreover, using the results of the theorem, a geometrical technique is presented to determine the GC of the pole.
关键词: spherical mechanisms instantaneous poles great circle angular velocity
A survey of instantaneous poles for a class of two-degree-of-freedom spherical mechanisms
Soheil ZARKANDI
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 344-353 doi: 10.1007/s11465-014-0320-z
This paper is a detailed exploration of instantaneous poles for a class of two-degree-of-freedom (two-DOF) spherical mechanisms (SMs) with seven links or bars. For two-DOF SMs, the secondary instantaneous poles (the ones which cannot be found by direct inspection) must lie on the specified great circles. For many of these mechanisms, however, some of these great circles cannot be obtained by a direct application of Aronhold-Kennedy theorem. This paper presents geometrical and analytical techniques to locate these unknown great circles for three topologies of seven-bar two-DOF SMs.
关键词: spherical mechanisms instantaneous poles Aronhold-Kennedy theorem great circles pencil of meridian
Modeling of large-deflection links for compliant mechanisms
Zhonglei FENG, Yueqing YU, Wenjing WANG,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 294-301 doi: 10.1007/s11465-010-0019-8
关键词: compliant mechanism pseudo-rigid-body model (PRBM) large-deflection link angular deflection approximation
New nonlinear stiffness actuator with predefined torque‒deflection profile
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0721-3
关键词: compliant actuator nonlinear stiffness actuator nonlinear spring predefined torque−deflection profile
Thermal deflection analysis of the solidified shell in continuous casting of slab
LIU Hongzhao, WANG Zhongmin
《机械工程前沿(英文)》 2007年 第2卷 第2期 页码 175-179 doi: 10.1007/s11465-007-0029-3
关键词: s reciprocal loading deflection expression reciprocal opposite
李学军,张美阳,褚福磊
《中国工程科学》 2007年 第9卷 第12期 页码 16-20
针对回转窑托轮偏斜对接触区应力分布的影响,运用赫兹接触理论,推导出托轮与滚圈最大接触应力比与托轮偏斜角的关系;采用有限元方法计算某支承结构托轮平行与呈最大偏斜角时的接触问题,得到支承部件接触应力和等效应力应变分布情况,并得出滚圈和托轮的危险易损部位;为回转窑的轴向调控提供了有效的理论依据。
Yuji CHEN, Qizhi LUO,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 352-356 doi: 10.1007/s11709-009-0057-7
关键词: thin-walled box girder with variable cross-sections potential variational theory shear lag large deflection problem
段敬民,钱永久,曾宪桃
《中国工程科学》 2004年 第6卷 第10期 页码 79-82
将一定几何尺寸的玻璃钢板粘贴在混凝土梁的受拉区,能有效地提高混凝土梁的抗弯承载能力和混凝土梁的横向刚度。通过解析的方法,分别考虑组合梁在3种不同受力状态下,对玻璃钢板中拉力进行解析,得到了组合梁在不同载荷作用下的挠度表达式。
Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads
Masoud ABEDINI, Azrul A. MUTALIB, Chunwei ZHANG, Javad MEHRMASHHADI, Sudharshan Naidu RAMAN, Roozbeh ALIPOUR, Tohid MOMENI, Mohamed H. MUSSA
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 532-553 doi: 10.1007/s11709-020-0604-9
赵慧英,沈兆武
《中国工程科学》 2007年 第9卷 第8期 页码 62-65
从炸药装药的瞬时爆轰产物飞散理论出发,根据动量守恒原理得出药型罩装药形成爆炸成型弹丸的速度计算模型,并根据装药高度与直径之比对弹丸速度的影响修正了计算模型。应用该计算模型计算了大锥角药形罩和球缺药型罩装药形成的爆炸成型弹丸速度,计算结果与实验和数值模拟得到的结果吻合较好,此速度计算模型适合于工程应用。
Ali Fadhil NASER, Zonglin WANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 308-320 doi: 10.1007/s11709-012-0140-3
关键词: prestressed concrete box girder monitoring external tendons strain deflection
Vibration testing of a steel girder bridge using cabled and wireless sensors
Dapeng ZHU, Yang WANG, James BROWNJOHN
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 249-258 doi: 10.1007/s11709-011-0113-y
关键词: wireless sensing structural health monitoring (SHM) signal conditioning operating deflection analysis ambient vibration
标题 作者 时间 类型 操作
On the location of the secondary instantaneous poles in two-degree-of-freedom spherical mechanisms
Soheil ZARKANDI
期刊论文
A survey of instantaneous poles for a class of two-degree-of-freedom spherical mechanisms
Soheil ZARKANDI
期刊论文
Modeling of large-deflection links for compliant mechanisms
Zhonglei FENG, Yueqing YU, Wenjing WANG,
期刊论文
Thermal deflection analysis of the solidified shell in continuous casting of slab
LIU Hongzhao, WANG Zhongmin
期刊论文
analysis of thin-walled box continuous girder with variable cross-sections in considering effect of large deflection
Yuji CHEN, Qizhi LUO,
期刊论文
Large deflection behavior effect in reinforced concrete columns exposed to extreme dynamic loads
Masoud ABEDINI, Azrul A. MUTALIB, Chunwei ZHANG, Javad MEHRMASHHADI, Sudharshan Naidu RAMAN, Roozbeh ALIPOUR, Tohid MOMENI, Mohamed H. MUSSA
期刊论文
Experimental monitoring of the strengthening construction of a segmental box girder bridge and field testing of external prestressing tendons anchorage
Ali Fadhil NASER, Zonglin WANG
期刊论文
Vibration testing of a steel girder bridge using cabled and wireless sensors
Dapeng ZHU, Yang WANG, James BROWNJOHN
期刊论文