【摘要】 阐述了大吨位双出杆粘滞阻尼器开发的数值与实验研究结果。基于硅油的幂律特性,通过对硅油介质的流态分析,介绍了非牛顿幂律流体模型对粘滞阻尼器耗能和阻尼出力的影响,与粘滞阻尼器的分析模型和计算公式。在商用流体软件平台上利用动网格技术对样品粘滞阻尼器阻尼出力进行了计算;综合实验研究结果,最终确定了大吨位土木用粘滞阻尼器设计的经验方法。另一方面,实验曲线和数值曲线基本吻和,验证了通过数值手段对粘滞阻尼器的出力特性进行预分析,从而提高开发精度、指导产品设计和缩短产品的开发周期的可行性。更多还原

【Abstract】 Large-tonnage-damping-force bi-directional-cylinder viscous fluid dampers was studied experimentally and numerically.Based on the power-law characteristic of silicone oil,the flow pattern of silicone oil was analyzed,the non-Newtonian fluid power-law model’s influence on the energy dissipation characteristic and the damping force of viscous dampers was discussed,and the calculation formulas were presented.The damping force of the viscous damper samples was simulated by professional CFD software based on the moving mesh technology;Based on comprehensive analysis of results,the experiential design method of large-tonnage-damping-force viscous fluid dampers was finally established.Comparison shows that,the numerical curves are in good agreement with experimental curves,which validates the feasibility of numerical method of preliminary design of the large-tonnage-damping-force bi-directional-cylinder viscous fluid dampers.The numerical method helps to enhance the engineering precision,guide the design,and shorten the development cycle.更多还原