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MTMD对结构刚度和质量参数摄动的鲁棒性 被引量:19
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作者 李春祥 杜冬 《振动与冲击》 EI CSCD 北大核心 2004年第1期38-40,共3页
基于结构刚度和质量的摄动 ,建立了设置MTMD结构的传递函数。于是MTMD的优化准则可定义为设置MTMD结构最大动力放大系数的最小值的最小化。根据结构摄动而质量不摄动与结构质量摄动而刚度不摄动两种情况 ,讨论了MTMD的有效性变化趋势。... 基于结构刚度和质量的摄动 ,建立了设置MTMD结构的传递函数。于是MTMD的优化准则可定义为设置MTMD结构最大动力放大系数的最小值的最小化。根据结构摄动而质量不摄动与结构质量摄动而刚度不摄动两种情况 ,讨论了MTMD的有效性变化趋势。数值分析表明 ,可以设计有效性与TMD相当但鲁棒性高得多的MTMD。因此 ,MTMD适用于控制频率变化的结构振动。 展开更多
关键词 MTMD结构 刚度 质量摄动 参数 鲁棒性 传递函数 控制
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Thermal and solutal Marangoni convection in three-layered viscous flows:Insights for liquid metal battery optimization
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作者 SHAHEEN Sidra HUANG Hu-lin +2 位作者 ARAIN Muhammad Bilal BHATTI Muhammad Mubashir KHALIQUE Chaudry Masood 《Journal of Central South University》 2025年第6期2087-2100,共14页
This study examines the intricate occurrences of thermal and solutal Marangoni convection in three-layered flows of viscous fluids,with a particular emphasis on their relevance to renewable energy systems.This researc... This study examines the intricate occurrences of thermal and solutal Marangoni convection in three-layered flows of viscous fluids,with a particular emphasis on their relevance to renewable energy systems.This research examines the flow of a three-layered viscous fluid,considering the combined influence of heat and solutal buoyancy driven Rayleigh-Bénard convection,as well as thermal and solutal Marangoni convection.The homotopy perturbation method is used to examine and simulate complex fluid flow and transport phenomena,providing important understanding of the fundamental physics and assisting in the optimization of various battery configurations.The inquiry examines the primary elements that influence Marangoni convection and its impact on battery performance,providing insights on possible enhancements in energy storage devices.The findings indicate that the velocity profiles shown graphically exhibit a prominent core zone characterized by the maximum speed,which progressively decreases as it approaches the walls of the channel.This study enhances our comprehension of fluid dynamics and the transmission of heat and mass in intricate systems,which has substantial ramifications for the advancement of sustainable energy solutions. 展开更多
关键词 viscous fluid three-layered closed geometries electrical conductivity thermal convection solutal convection mass diffusivity homotopy perturbation methods
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