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轴向力影响下大阻尼梁高频能量流响应解析模型
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作者 江旭东 熊志 滕晓艳 《噪声与振动控制》 CSCD 北大核心 2023年第1期1-6,30,共7页
针对轴向力作用下大阻尼梁的高频振动问题,基于能量流分析方法构建高频动响应解析预报模型。推导梁结构的能量传递方程和能量损失方程,结合功率平衡方程构建轴向力影响下大阻尼梁的能量密度控制方程。以简支梁为典型算例,分析结构的能... 针对轴向力作用下大阻尼梁的高频振动问题,基于能量流分析方法构建高频动响应解析预报模型。推导梁结构的能量传递方程和能量损失方程,结合功率平衡方程构建轴向力影响下大阻尼梁的能量密度控制方程。以简支梁为典型算例,分析结构的能量密度响应,研究轴向力和结构阻尼损耗因子对高频能量流响应的影响。数值结果表明:提出的能量流响应解析模型渐进一致逼近基于波动分析法的经典模型解,可以准确预示轴向力作用下大阻尼梁的高频弯曲振动响应。随着梁结构轴向载荷和阻尼损耗因子的增加,能量密度自激励点向两端约束边界衰减速度提高。但是,梁结构的弯曲振动总能量随轴向载荷单调增加,而随阻尼损耗因子单调减小。 展开更多
关键词 振动与波 能量流响应 大阻尼梁 轴向力 高频 解析模型
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Energy Consumption, Thermal Performance and Thermal Comfort in Public School Buildings in Jordan
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作者 Abdulsalam A. Alshboul 《Journal of Civil Engineering and Architecture》 2014年第12期1482-1494,共13页
Good learning outputs in schools require an acceptable physical environment inside schools. Whatever the climatic context that surrounds any school buildings, energy flows of different types should be provided. Concer... Good learning outputs in schools require an acceptable physical environment inside schools. Whatever the climatic context that surrounds any school buildings, energy flows of different types should be provided. Concerns may include thermal environment, luminous environment and acoustics environment. Types of energy used are an important variable that contributes to thermal comfort. Physical structure of the school building is another factor to be taken into consideration. This article established a relationship between thermal comfort inside schools and types of energy flows which have been consumed to maintain the level of comfort required, controlled by the building fabric and consequent economic factors that affect energy consumption of school buildings. Different approaches were applied in order to achieve the research objectives. Field surveys, field measurements and analyzing historical data were the most approaches followed to implement this study. The final outputs of this work have a national value nationwide: establishing a relationship among thermal comfort, energy flows and building fabric is of importance. Furthermore, it is of great importance to the decision maker for educational facilities. Research will also establish a wide platform based on scientific investigations for developing climate responsive school architecture in Jordan. 展开更多
关键词 School buildings ENERGY thermal comfort educational environments thermal performance Jordan.
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