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首页> 美国政府科技报告 >Viscous Heating of Fluid Dampers during Seismic and Wind Excitations: Analytical211 Solutions and Design Formulae
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Viscous Heating of Fluid Dampers during Seismic and Wind Excitations: Analytical211 Solutions and Design Formulae

机译：地震和风激发过程中流体阻尼器的粘性加热：analytical211解决方案和设计公式

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摘要

In this report, the problem of viscous heating is examined and closed form211u001eexpressions are developed to compute the temperature rise within fluid dampers as 211u001ethey dissipate the earthquake or wind-induced energy in structures. First, the 211u001eproblem of viscous heating is analyzed at the limit of very small piston motions. 211u001eThe range of validity of the linearized heat transfer equation is investigated, 211u001eand analytical solutions for the tmperature rise on the piston head are derived. 211u001eSolutions for different forcing functions are derived by considering an 211u001eapproximate one-dimensional energy equation expressed at a cross section of the 211u001edamper, which was obtained after replacing the power input in the damper with a 211u001edistributed heat source located at the piston head. Subsequently, the problem of 211u001eviscous heating is analyzed at the limit of long-stroke motions where most of the 211u001efluid travels through the damper valve(s). This study is of interest in the case 211u001eof strong earthquake motions where dampers are subjected to large displacements. 211u001eSome recommendations on the damper design are offered in order to keep the damper 211u001etemperatures within acceptable values.

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