ABSTRACT

Issues with traditional implementations of tangent-stiffness-proportional damping model are associated with negative damping forces that develop in the post-yield range when the system stiffness becomes negative and with unrealistic damping forces arising at degrees of freedom undergoing second-order movements only. To overcome these issues, this paper proposes a localized formulation of the tangent-stiffness-proportional damping model which can be used in nonlinear dynamic analysis of simple inelastic systems. Results show the consistency of the local and global damping formulations in small displacements and the effectiveness of the localized tangent-stiffness-proportional damping model in the presence of material and geometrical nonlinearities.

摘要

切线刚度比例阻尼模型的传统实现问题与系统刚度变为负时在屈服后范围内产生的负阻尼力以及仅经历二阶运动的自由度产生的不切实际的阻尼力有关。为了克服这些问题，本文提出了切线刚度比例阻尼模型的局部公式，该模型可用于简单非弹性系统的非线性动力学分析。结果显示了局部和全局阻尼公式在小位移中的一致性以及局部切线刚度比例阻尼模型在存在材料和几何非线性的情况下的有效性。