钱江
数值计算方法及工程结构问题的数值模拟分析
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- 姓名:钱江
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学术头衔:
博士生导师
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学科领域:
水文学
- 研究兴趣:数值计算方法及工程结构问题的数值模拟分析
钱江研究员,1960生,1978年考入中国科学技术大学力学系固体力学专业,分别于1982、1985及1989年在该校获理学学士、工学硕士及博士学位。自1989年起,任教于同济大学,从事固体力学、计算结构力学及工程结构抗震专业方面的教学、科研工作,主要研究方向是数值计算方法及工程结构问题的数值模拟分析。于1992年获欧共体联合研究中心“Marie Curie Fellowship”,在希腊Patras大学任高级访问科学家;1993-94年获联邦德国洪堡基金会洪堡研究金(Alexander von Humboldt Fellowship),在德国鲁尔大学任客座研究员;1995-96年获香港裘槎基金会资助,在香港大学从事数值计算方法方面的研究。现为同济大学结构工程与防灾研究所研究员,博士生导师,中国力学学会固体力学专业委员会振动专业组副组长,反应堆结构力学专业委员会副主任委员。已发表学术论文60余篇。曾获省部级科技进步奖二项,二次被选拔为“上海市高校优秀青年教师”。
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钱江, 陈原
工程力学,2004,21(1):125~130,-0001,():
-1年11月30日
利用模糊有限元方法研究了文克尔地基上的梁和桩在确定性荷载作用下的反应,其中梁和桩身材料的物性参数及地基参数均模拟成模糊变量。在上述模糊变量为小变量的前提下,利用一种基于普通摄动法原理的模糊摄动展开方法求解模糊有限元平衡方程组得到结构反应量的模糊集。导出了用模糊摄动展开方法求解弹性地基上梁和桩的计算公式,并研究了结构中各模糊参变量对结构反应量模糊集的影响。经与数值模拟的结果比较后表明,方法在精度和实用性方面可较好的满足要求。
结构工程, 模糊有限元法, 模糊集, 隶属度, 弹性地基梁, 层状介质
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【期刊论文】金属基纳米复合材料等效弹性模量的均匀化方法数值模拟
钱江, 袁红, 钱江*, 王秀喜, 刘光勇
力学季刊,2003,24(4):567~571,-0001,():
-1年11月30日
均匀化理论利用位移场双尺度渐近展开建立有限元列式,本文将其与有限元通用程序相结合,应用于金属基复合材料的弹性本构数值模拟。通过对不同尺度增强相金属基复合材料等效模量的数值模拟,考察了均匀化方法的适用情况。数值计算结果表明,对常规尺度增强相金属基复合材料,均匀化方法可以较准确地预测其等效弹性模量;对纳米增强相金属基复合材料,该方法仍可给出较好的预测,但存在某种程度的系统偏差。通过对纳米尺度增强机理的分析讨论,认为纳米增强相与基体材料间的界面效应可能有别于连续介质假设,指出可以考虑采用离散原子-连续介质耦合模型改进数值模拟结果。
金属基复合材料, 纳米复合材料, 均匀化理论, 等效模量
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钱江, 陈原
力学季刊,2002,23(2):210~218,-0001,():
-1年11月30日
实际工程问题中,常常会包含一些难以准确描述的系统参数。本文根据模糊集理论,将结构中的不确定参数转化为模糊参数,从而建立起含模糊参数的有限元平衡方程,应用一般模糊线性方程解的基本原理,对模糊有限元平衡方程解的概念及方法进行了讨论,并在此基础上提出了一种改进解的概念以及以摄动法为基础的求解方法。该方法假定当不确定参数相对于其清晰值的分解度不很大时,可以将其在清晰值附近作摄动展开。文中也简要讨论了改进解与现有的模糊有限元方程组各种解之间的关系。相对于现有的其它解法,本文建议的方法更易于与常规的有限元软件结合,用于处理工程实际问题。对算例结果的分析表明,本文方法可较好地符合实际要求。
模糊集, 隶属度, λ-截集, 模糊线性方程组, 摄动法
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75浏览
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【期刊论文】Application of a New Dynamic Reduction Procedure to Seismic Analysis of High-rise Buildings
钱江, J. Qian, Z. Yang and X. L. Lu
Advances in structural dynamics, Vol. 11,-0001,():
-1年11月30日
It is realized that, for many practical problems, the localized vibration pattern usually has a very little contribution to the overall response behavior of the system. From this point, a new dynamic reduction procedure is proposed and applied to the seismic analysis of complex engineering structures. By introducing a set of virtual master degrees of freedom (VMDOF) which represent the mean value of displacements at the substructural interface. The compatibility is conducted to those VMDOF only while all other real nodes at interfaces are considered as secondary slavers and then can be eliminated by the conventional Guyan reduction procedure. Numerical example shows that this method is quite efficient for the seismic analysis of high-rise building structures.
Finite element method,, Eigenvalue problem,, Dynamic reduction,, High-rise building,, Seismic analysis
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60浏览
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钱江, 翁智远, 徐礼存
核动力工程,2000,21(4):328~331,-0001,():
-1年11月30日
试图对池式快堆结构作较大简化,使计算简图既能反应堆结构的动力特性,又能使计算简便可行。从而把一个复杂的结构用一个简单的弹簧.质量体系来近似地等效代替。引入容器的变形假设和确定的液动压力假设,应用虚位移原理可获得体系在水平地震作用下的运动方程,丽后考察其地震动响应。
快堆, 弹簧-质量体系, 虚位移原理, 地震响应
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67浏览
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【期刊论文】DYNAMIC ANALYSIS OF RIGID SURFACE FOOTINGS BY BOUNDARY ELEMENT METHOD
钱江, J. QIAN AND L.G. THAM AND Y.K. CHEUNG
Journal of Sound and Vibration (1998) 214 (4), 747-759,-0001,():
-1年11月30日
An accurate and efficient boundary element procedure is developed for the analysis of dynamic response of rigid surface footings. The footings are assumed to be resting on an elastic half-space. The problem is formulated in the frequency domain by adopting the half-space Green's function for surface points loads. Therefore, only discretization is required for the soil-footing interface. Two types of element, linear and quadratic isoparametric elements, are employed for the discretization. Examples of the single-footing as well as two-footing system are presented to demonstrate the application of the method. The results are compared with other published results. It is demonstrated that the present results are in good agreement with the approximate solution proposed by Tajimi at low frequency range. However, the approximate solution may lead to an over-estimation of the amplitude and decaying rate as the frequency increases.
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【期刊论文】Harmonic wave response of two 3-D rigid surface foundations
钱江, J. Qian* & D.E. Beskos
Soil Dynamics and Earthquake Engineering 15(1996)95-110,-0001,():
-1年11月30日
A boundary element methodology is developed for studying the response of a system of two rigid, massless or massive, surface foundations of arbitrary planforms to various harmonic waves under three-dimensional conditions. The method employs the frequency domain Green's function for the surface of the elastic half-space, thereby restricting the discretization only to the soil-foundation interfaces, and isoparametric quadratic quadrilateral boundary elements for increased accuracy. Extensive comparison studies with other known numerical solutions confirm the high accuracy of the proposed method. Detailed parametric studies are conducted in order to study the harmonic wave response of two square foundations as a function of the kind of incident wave, the angles of wave incidence, the wave frequency, the separation distance between the foundations and the amount of mass in each foundation and compare it against that of a single foundation for assessing the through the soil coupling effect.
BEM,, harmonic seismic waves,, rigid surface foundations,, crossinteraction.,
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【期刊论文】DYNAMIC CROSS-INTERACTION BETWEEN FLEXIBLE SURFACE FOOTINGS BY COMBINED BEM AND FEM
钱江
,-0001,():
-1年11月30日
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钱江
,-0001,():
-1年11月30日
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86浏览
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【期刊论文】A COMPARATIVE STUDY OF THE CABLE-STAYED BRIDGE WITH UNILATERAL SUPPORTS
钱江, Jiang Qian, † Wenda Lu and Zhiyuan Weng
Computers & Structures Vol. 53, No.6, pp. 1389-1394. 1994,-0001,():
-1年11月30日
A mathematical programming method for the analysis of the cable-stayed bridge with unilateral supports is presented. A detailed comparative study of the nonlinear phenomenon arising from the unilateral restriction at intermediate piers of the bridge is carried out. The characteristics of the unilateral supports can be described by a set of control variables which are of multi-folded constitutive relations with piecewise linearity. By using the parametric variational principle, it leads to the solution of a quadratic programming problem or to a linear complementary problem. The distinguished figures of the cable-stayed bridge with this kind of support are illustrated' by numerical examples.
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