| 陈水福,李常虹.悬索大挠度风振响应的有限体积法分析[J].计算力学学报,2006,23(4):434~439 |
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| 悬索大挠度风振响应的有限体积法分析 |
| A finite-volume method for large deflection wind-excited response analysis of suspended cables |
| 修订日期：2004-06-15 |
| DOI：10.7511/jslx20064082 |
| 中文关键词: 悬索结构 有限体积法 几何非线性 大挠度 风振响应 |
| 英文关键词:suspended cables,finite-volume method,geometric non-linearity,large deflection wind-excited responses |
| 基金项目:中国科学院资助项目 |
| 陈水福 李常虹 |
| 浙江大学土木工程系,浙江杭州310027 |
| 摘要点击次数: 1385 |
| 全文下载次数: 8 |
| 中文摘要: |
| 基于Lagrange原理，建立了一套新的悬索大挠度动力特性和动力响应分析的有限体积法列式，推导了结点力向量、质量矩阵和单元刚度矩阵的显式表达式。该列式的一个显著特点是直接利用工程应变定义结构变形，其物理意义明确，列式简单，适用于各种垂度和荷载情况的悬索大挠度动力分析。实例动力特性和随机风振响应分析表明，该有限体积列式不仅计算效率高，而且具有良好的计算精度。 |
| 英文摘要: |
| A finite-volume formulation for the analysis of largedeflection dynamic characteristics and dynamic responses of suspended cables is established based on the principle of Lagrange.The explicit expressions of the nodal force vector,mass and tangent stiffness matrices are presented.A particularly important feature of the present formulation is the use of the engineering strains instead of the Green strains for defining the cable deformations.As a result the formulation is simple and has a clear physical meaning.Numerical examples for the analysis of dynamic characteristics and stochastic wind-excited responses are given.The obtained results indicate that the present method is accurate and efficient and is applicable to large-deflection dynamic analysis of suspended cables in any sag and loading conditions. |
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