共查询到20条相似文献,搜索用时 31 毫秒
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由中国力学学会、周培源基金会主办, 清华附中承办的``2011年海峡两岸力学交流暨中学生力学夏令营'活动于2011年7月13日在北京清华附中拉开帷幕.由台湾省力学学会秘书长、台湾云林科技大学建筑系教授蔡佐良带队的台湾省师生代表团一行28人, 以及全国各省市力学工作者及优秀中学生代表90余人参加了此次夏令营活动. 相似文献
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介绍分析力学学科的3部经典著作. Whittaker的《分析动力学》、Hamel
的《理论力学》和Lurie的《分析力学》. 概述这些经典著作的主要内容, 考察这些著作对学科发
展的影响, 分析这些著作的特点, 最后介绍各书作者的学术简历、主要贡献和其他著作. 相似文献
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跨世纪的中国计算力学 总被引:5,自引:0,他引:5
简要介绍中国计算力学的形成和发展,回顾了30多年来中国计算力学工作者在计算力学基本理论、方法和应用软件等各方面所取得的成就,展望21世纪中国计算力学的发展和可能的重要研究方向。 相似文献
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关于Emden方程的对称性——————分析力学札记之十一 总被引:2,自引:1,他引:2
研究著名的Emden方程的3种表达在群的无限小变换
下的Noether对称性、Lie对称性和形式不变性. 结果表明,
同一微分方程的不同表达可有不同的对称性. 相似文献
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讨论对称性研究中发生的两个问题. 一是
X (1) (L)中出现的q能否用微分方程消去, 结果表明对Noether
对称性应慎用. 二是Noether对称性在调整规范函数时其他对称性有否变化, 结果
表明对形式不变性会有变化. 相似文献
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神经算法在施工力学中的应用 总被引:4,自引:0,他引:4
利用神经算法进行矩阵运算的基本原理探讨了在施工力学中应用神经算法的可行性。引入虚、实单元的概念,在整个施工力学分析过程中保持有限元网格不变,通过物理参数的变化反映求解区域的变化,可以提高施工力学中多次重分析的计算效率。 相似文献
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An approach combining the method of moment equations and the statistical linearization technique is proposed for analysis of the response of non-linear mechanical systems to random excitation. The adaptive statistical linearization procedure is developed for obtaining a more accurate mean square of responses. For these, a Duffing oscillator and an oscillator with cubic non-linear damping subject to white noise excitation are considered. It is shown that the adaptive statistical linearization proposed yields good accurate results for both weak and strong non-linear stochastic systems.Presented at the First European Solid Mechanics Conference, September 9–13, 1991. Munich, Germany 相似文献
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《力学快报》2020,10(1):1-7
With the development of cutting-edge sciences and new technologies, we have to consider the size, the density, the hardness, the stiffness and other properties of engineering materials and structures beyond the conventional ranges, as well as their mechanical behavior in extreme environments, such as ultra-conventional temperature, speed, physical and chemical fields, and severe weather, and more effective theories and methods of mechanics are required. This paper first gives the fundamental definition and the scientific connotation of extreme mechanics, then reviews the studies of extreme mechanics from three aspects: the extreme properties, the extreme loads, and the discipline development, as well as major engineering and scientific challenges. The characteristics of extreme mechanics and major challenges in the aspects of mechanical theory,computational methods and experimental techniques are discussed. Prospectivei developments of extreme mechanics are suggested. 相似文献
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We present a formulation of continuum damage in glacier ice that incorporates the induced anisotropy of the damage effects but restricts these formally to orthotropy. Damage is modeled by a symmetric second rank tensor that structurally plays the role of an internal variable. It may be interpreted as a texture measure that quantifies the effective specific areas over which internal stresses can be transmitted. The evolution equation for the damage tensor is motivated in the reference configuration and pushed forward to the present configuration. A spatially objective constitutive form of the evolution equation for the damage tensor is obtained. The rheology of the damaged ice presumes no volume conservation. Its constitutive relations are derived from the free enthalpy and a dissipation potential, and extends the classical isotropic power law by elastic and damage tensor dependent terms. All constitutive relations are in conformity with the second law of thermodynamics.PACS 83.60.Df, 62.20.Mk 相似文献
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基于向量机(vectorcomputers)和并行机(parallelcomputers)两大类并行计算机,对线性静力和动力问题,非线性静力和动力问题,本文概说了相应于这两大类并行机一般的求解方法。 相似文献
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高层建筑结构施工力学分析 总被引:26,自引:0,他引:26
通常高层结构设计是以建造好结构在使用荷载下的计算模型为依据。然而这是同结构在实际施工过程产生的力学状态有差异的。为此本文将采用超级有限元-有限元耦合法对高层结构进行施工模拟分析,按照施工顺序及施工时的实际情况进行力学分析,从而对保证结构建造全过程的可靠性和安全性,指导选用合理的施工方案,具有一定的理论意义和现实意义。 相似文献