（1 中衡设计集团股份有限公司, 苏州 215021; 2 江苏省生态建筑与复杂结构工程技术研究中心, 苏州 215021）

［摘要］阻尼作为反映结构振动过程中能量耗散的动力特性之一，不同于结构质量和刚度等其他动力特性可直接通过计算确定，在计算中通常需要抽象为数学模型。对结构设计中常见的阻尼数值模型进行了总结，对国内外规范和规程的阻尼使用方法进行了对比；基于结构运动方程，对比分析了常用的振型阻尼和瑞雷阻尼模型。以实际应用项目为背景，介绍了不同情况下阻尼的实现和分析方法，对阻尼模型的选择和阻尼比的取值进行了研究，并给出设计建议。对比分析了阻尼在动力弹塑性隐式分析和显式分析中的实现方法，基于ABAQUS/Explicit方法，对振型阻尼在显式分析中的应用方法进行了探讨和研究。

［关键词］振型阻尼； 瑞雷阻尼； 显式分析； 动力弹塑性分析

中图分类号：TU352文献标识码：A文章编号：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

作者简介：张谨，研究员级高级工程师，一级注册结构工程师，英国注册结构工程师，Email: zhangjin@artsgroup.cn。