- 摘 要
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（1 中衡設(shè)計集團股份有限公司, 蘇州 215021; 2 江蘇省生態(tài)建筑與復(fù)雜結(jié)構(gòu)工程技術(shù)研究中心, 蘇州 215021）
［摘要］阻尼作為反映結(jié)構(gòu)振動過程中能量耗散的動力特性之一，不同于結(jié)構(gòu)質(zhì)量和剛度等其他動力特性可直接通過計算確定，在計算中通常需要抽象為數(shù)學(xué)模型。對結(jié)構(gòu)設(shè)計中常見的阻尼數(shù)值模型進行了總結(jié)，對國內(nèi)外規(guī)范和規(guī)程的阻尼使用方法進行了對比；基于結(jié)構(gòu)運動方程，對比分析了常用的振型阻尼和瑞雷阻尼模型。以實際應(yīng)用項目為背景，介紹了不同情況下阻尼的實現(xiàn)和分析方法，對阻尼模型的選擇和阻尼比的取值進行了研究，并給出設(shè)計建議。對比分析了阻尼在動力彈塑性隱式分析和顯式分析中的實現(xiàn)方法，基于ABAQUS/Explicit方法，對振型阻尼在顯式分析中的應(yīng)用方法進行了探討和研究。
［關(guān)鍵詞］振型阻尼； 瑞雷阻尼； 顯式分析； 動力彈塑性分析
中圖分類號：TU352文獻標(biāo)識碼：A文章編號：1002-848X(2019)01-0076-07
Understanding and application of damping in structural dynamic calculation
Zhang Jin1,2, Gong Minfeng1,2, Yang Lülei1,2
(1 ARTS Group Co., Ltd., Suzhou 215021, China;2 Jiangsu Engineering Institute of Ecological Building & Complex Structure, Suzhou 215021, China)
Abstract:As one of the dynamic characteristics reflecting the energy dissipation in the structural vibration process, damping is different from other structural characteristics such as structural mass and stiffness which can be directly determined by calculation. It is usually abstracted into a mathematical model during the calculation. The commonly used damping numerical models in structural design were summarized, and the damping methods in domestic and foreign codes and specifications were compared. Based on the structural equations of motion, the commonly used modal damping and Rayleigh damping models were compared. The realization and analysis methods of damping under different conditions were introduced based on actual application project. The selection of damping model and the value of damping ratio were studied, and the structural design suggestions were given. The implementation methods of damping in implicit analysis and explicit analysis on dynamic elasto-plastic analysis were compared. Based on ABAQUS/Explicit method, the application method of modal damping in explicit analysis was discussed and studied.
Keywords:modal damping; Rayleigh damping; explicit analysis; dynamic elasto-plastic analysis
作者簡介：張謹(jǐn)，研究員級高級工程師，一級注冊結(jié)構(gòu)工程師，英國注冊結(jié)構(gòu)工程師，Email: zhangjin@artsgroup.cn。
