第四章结构被动调谐减震控制Chapter 4 Structural passive tunedvibration control结构被动调谐减震控制概述Introduction to passive tuned vibration control单质点结构被动调谐减震控制Passive tuned vibration control.of SDOF system多质点结构被动调谐减震控制Passive tuned vibration control of MDOF system结构被动调谐减震控制的工程应用Applications of passive tuned vibration control in civilengineering
第四章 结构被动调谐减震控制 Chapter 4 Structural passive tuned vibration control 结构被动调谐减震控制概述 Introduction to passive tuned vibration control 单质点结构被动调谐减震控制 Passive tuned vibration control of SDOF system 多质点结构被动调谐减震控制 Passive tuned vibration control of MDOF system 结构被动调谐减震控制的工程应用 Applications of passive tuned vibration control in civil engineering d
4.1结构被动调谐减震控制概述Introduction to passive tuned vibration control4. 1. 1 Principles of passive tuned vibration controlPrinciples结构被动调谐减震控制体系，由结构和附加在主结构上的子结构组成。附加的子结构具有质量、刚度和阻尼，因而可以调整子结构的自振频率，使其尽量接近主结构的基本频率或激振频率。这样，当主结构受激励而振动时，子结构就会产生一个与结构振动方向相反的惯性力作用在主结构上，使主结构的振动反应衰减并受到控制。由于这种减震控制不是通过提供外部能量，只是通过调整结构的频率特性来实现的，故称为“被动调谐减震控制”。也称“动力消震
4.1 结构被动调谐减震控制概述 Introduction to passive tuned vibration control 4.1.1 Principles of passive tuned vibration control Principles 结构被动调谐减震控制体系，由结构和附加在主结构上的子结 构组成。附加的子结构具有质量、刚度和阻尼，因而可以调整子 结构的自振频率，使其尽量接近主结构的基本频率或激振频率。 这样，当主结构受激励而振动时，子结构就会产生一个与结构振 动方向相反的惯性力作用在主结构上，使主结构的振动反应衰减 并受到控制。由于这种减震控制不是通过提供外部能量，只是通 过调整结构的频率特性来实现的，故称为“被动调谐减震控制” 。 也称“动力消震”
Passivetuned vibration control system consists ofKT,Crmain structure and the substructure attached to it.MTTheadditionalsubstructurehasmass.stiffnessand damping, so it is possible to tune the naturalperiod of substructure by itself with thefundamental frequency of the main structure.Thus,when the main structure vibrates under excitation,thesubstructurewill produceaninertiaforceactingonthe main structure whose directionisopposite to the vibration ofthemain structure,which minimize the vibration response of the mainstructure.Since this kind of vibration control isachievedbytuningthestructuralfrequencyanddoes notneed anyexternal energysupplyforoperation, it is called passive tuned vibrationcontrol,alsoknownas“dynamicvibrationabsorption
Passive tuned vibration control system consists of main structure and the substructure attached to it. The additional substructure has mass, stiffness and damping, so it is possible to tune the natural period of substructure by itself with the fundamental frequency of the main structure. Thus, when the main structure vibrates under excitation, the substructure will produce an inertia force acting on the main structure whose direction is opposite to the vibration of the main structure, which minimize the vibration response of the main structure. Since this kind of vibration control is achieved by tuning the structural frequency and does not need any external energy supply for operation, it is called passive tuned vibration control , also known as “dynamic vibration absorption
Types of passive tuned damper调谐质量阻尼器（TunedMassDamper简TMD）：支承式调谐质量阻尼器Translational TMD悬吊式调谐质量阻尼器Suspending TMD悬吊式调谐摆动阻尼器PendulumTunedMassDamper(a)(h)(c)
Types of passive tuned damper 调谐质量阻尼器(Tuned Mass Damper简TMD)： 支承式调谐质量阻尼器 Translational TMD 悬吊式调谐质量阻尼器 Suspending TMD 悬吊式调谐摆动阻尼器Pendulum Tuned Mass Damper
Typesof passivetunedcontrolO调谐液体阻尼器（TunedLiquidDamper，简TLD）调谐液体储液池式阻尼器sloshingdamper谐液体U形柱式阻尼器tunedliquidcolumndamperFirst is the sloshing damper as shownin Fig. (a). Vibration period is adjustedTLDby the size of the container or depth ofthe liquid. Damping capacity isincreasedbyplacingmeshesorrodsin the liquid.The secondisthetuned liguid columndamper as shown in Fig, (b). Vibrationperiod is adjusted by shapes of columnor air pressure in the column. Dampingcapacityis increased by adjusting the(b)(a)orifice in the column which generateshigh turbulence
Types of passive tuned control 调谐液体阻尼器（Tuned Liquid Damper, 简TLD）: 调谐液体储液池式阻尼器 sloshing damper 谐液体Ｕ形柱式阻尼器 tuned liquid column damper First is the sloshing damper as shown in Fig. (a). Vibration period is adjusted by the size of the container or depth of the liquid. Damping capacity is increased by placing meshes or rods in the liquid. The second is the tuned liquid column damper as shown in Fig, (b). Vibration period is adjusted by shapes of column or air pressure in the column. Damping capacity is increased by adjusting the orifice in the column which generates high turbulence