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土桩结构非线性相互作用体系行波效应的并行计算分析 被引量:5
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作者 张巍 陈清军 《湖南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2012年第6期19-25,共7页
采用并行计算方法,分别选取长周期地震波和普通地震波作为输入,以某典型桥梁工程为背景建立土桩桥梁结构非线性相互作用分析模型,对在不同类型地震波作用下的土桩结构非线性相互作用体系进行了行波效应分析,探讨了桩土接触效应和并行计... 采用并行计算方法,分别选取长周期地震波和普通地震波作为输入,以某典型桥梁工程为背景建立土桩桥梁结构非线性相互作用分析模型,对在不同类型地震波作用下的土桩结构非线性相互作用体系进行了行波效应分析,探讨了桩土接触效应和并行计算加速比等问题.分析结果表明:接触面效应对群桩水平向地震反应的影响较小,在竖直向则会产生明显的不协调现象.考虑接触面效应时,行波输入下的结构水平向加速度反应略小于一致输入,竖向加速度反应则远大于一致输入,水平向和竖向的位移反应也较大.长周期地震动行波输入下的水平向加速度和位移反应结果均大于普通地震波.对于此类大计算量三维有限元分析,采用并行计算方法可以有效提高计算效率. 展开更多
关键词 非线性相互作用体系 行波效应 长周期地震波 并行计算 桥梁结构
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Review of cavity optomechanics in the weak-coupling regime: from linearization to intrinsic nonlinear interactions 被引量:6
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作者 XIONG Hao SI LiuGang +2 位作者 LV XinYou YANG XiaoXue WU Ying 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2015年第5期16-28,共13页
Recently, cavity optomechanics has become a rapidly developing research field exploring the coupling between the optical field and mechanical oscillation. Cavity optomechanical systems were predicted to exhibit rich a... Recently, cavity optomechanics has become a rapidly developing research field exploring the coupling between the optical field and mechanical oscillation. Cavity optomechanical systems were predicted to exhibit rich and nontrivial effects due to the nonlinear optomechanical interaction. However, most progress during the past years have focused on the linearization of the optomechanical interaction, which ignored the intrinsic nonlinear nature of the optomechanical coupling. Exploring nonlinear optomechanical interaction is of growing interest in both classical and quantum mechanisms, and nonlinear optomechanical interaction has emerged as an important new frontier in cavity optomechanics. It enables many applications ranging from single-photon sources to generation of nonclassical states. Here, we give a brief review of these developments and discuss some of the current challenges in this field. 展开更多
关键词 cavity optomechanics nonlinear interactions weak-coupling regime radiation pressure
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