本文针对一实际工程结构———大连国贸大厦,研究了风荷载作用下调液阻尼器的减振控制作用。首先建立了该结构的简化计算模型,利用Davenport谱给出了模拟风荷载。在大厦所处位置进行多次测量,得到实际风速样本。选取其中风速较大、过程...本文针对一实际工程结构———大连国贸大厦,研究了风荷载作用下调液阻尼器的减振控制作用。首先建立了该结构的简化计算模型,利用Davenport谱给出了模拟风荷载。在大厦所处位置进行多次测量,得到实际风速样本。选取其中风速较大、过程平稳的样本,对实测样本和模拟样本的频谱进行比较,验证了模拟风荷载的合理性。文中将大厦顶层的生活水箱设计成可减小结构位移及加速度反应的控制装置TLD(tuned liqu id damper),根据不同工况进行数值计算,选出最佳方案,设计出可实际应用、并达到一定减振效果的减振水箱,以提高大厦在风荷载作用下的舒适度。展开更多
为增大调谐液体阻尼器(TLD)中液体的晃动质量,以获得更优的动力特性,首次提出内置横向圆柱体TLD(TLD embedded a transverse cylinder,简称TLDETC)的概念。结合流体力学原理以及能量方法推导了TLDETC的晃动质量、晃动力、晃动阻尼比以...为增大调谐液体阻尼器(TLD)中液体的晃动质量,以获得更优的动力特性,首次提出内置横向圆柱体TLD(TLD embedded a transverse cylinder,简称TLDETC)的概念。结合流体力学原理以及能量方法推导了TLDETC的晃动质量、晃动力、晃动阻尼比以及晃动频率的表达式,并通过三种设置方案对TLDETC与普通TLD进行了动力特性的对比分析。推导结果表明,TLDETC有效地增大了液体的晃动质量;而分析结果表明,TLDETC具有比普通TLD更优的动力性能。展开更多
The arbitrary Lagrange-Eulerian (ALE) finite element method (FEM) was successfully used to analyze fluid-structure interaction with a free surface. The fluid was regarded as a convection dominated incompressible visc...The arbitrary Lagrange-Eulerian (ALE) finite element method (FEM) was successfully used to analyze fluid-structure interaction with a free surface. The fluid was regarded as a convection dominated incompressible viscous with the viscous and the slip boundary conditions. Generalized variational principles were established for the problem with large amplitude sloshing due to the free fluid surface. The Newmark-β integration method with a predictor-corrector scheme was used to solve the nonlinear dynamic response of the coupled ALE-FEM equations. Numerical examples were given to analyze the effects of a tuned liquid damper (TLD) setting on the structure. The horizontal nonlinear displacement responses in time domain at the top of the structure and the fluid elevation histories along the wall were computed and compared with predictions of a simplified mass-spring system.展开更多
文摘本文针对一实际工程结构———大连国贸大厦,研究了风荷载作用下调液阻尼器的减振控制作用。首先建立了该结构的简化计算模型,利用Davenport谱给出了模拟风荷载。在大厦所处位置进行多次测量,得到实际风速样本。选取其中风速较大、过程平稳的样本,对实测样本和模拟样本的频谱进行比较,验证了模拟风荷载的合理性。文中将大厦顶层的生活水箱设计成可减小结构位移及加速度反应的控制装置TLD(tuned liqu id damper),根据不同工况进行数值计算,选出最佳方案,设计出可实际应用、并达到一定减振效果的减振水箱,以提高大厦在风荷载作用下的舒适度。
文摘为增大调谐液体阻尼器(TLD)中液体的晃动质量,以获得更优的动力特性,首次提出内置横向圆柱体TLD(TLD embedded a transverse cylinder,简称TLDETC)的概念。结合流体力学原理以及能量方法推导了TLDETC的晃动质量、晃动力、晃动阻尼比以及晃动频率的表达式,并通过三种设置方案对TLDETC与普通TLD进行了动力特性的对比分析。推导结果表明,TLDETC有效地增大了液体的晃动质量;而分析结果表明,TLDETC具有比普通TLD更优的动力性能。
基金Supported by the National Key Basic Research Fund( No.G19980 2 0 316 ) ,the National Key Project onBasic Research and Applied Research ( No.PD95 2 190 4) and the National Natural ScienceFoundation of China( No.19972 0 2 9)
文摘The arbitrary Lagrange-Eulerian (ALE) finite element method (FEM) was successfully used to analyze fluid-structure interaction with a free surface. The fluid was regarded as a convection dominated incompressible viscous with the viscous and the slip boundary conditions. Generalized variational principles were established for the problem with large amplitude sloshing due to the free fluid surface. The Newmark-β integration method with a predictor-corrector scheme was used to solve the nonlinear dynamic response of the coupled ALE-FEM equations. Numerical examples were given to analyze the effects of a tuned liquid damper (TLD) setting on the structure. The horizontal nonlinear displacement responses in time domain at the top of the structure and the fluid elevation histories along the wall were computed and compared with predictions of a simplified mass-spring system.
