平面曲折槽机构参数与结构阻尼系数关系模型

摘要

For the previous research of tortuous groove relying too much on simulation,a relational model between the parameters of planar tortuous groove and damping coefficient was proposed.A spring-damper-mass system was built and the relationship between damping coefficient and distinguishing performance of the loading was analyzed.According to the relationship between damping coefficient and transient response rise time,the impact of the tortuous groove incli-nation and anchor groove gap to damping coefficient was derived and it has been well verified by ANSYS simulating and MATLAB curve fitting.The results showed that when tortuous groove inclination and the anchor groove gap increases, damping coefficient was first decreased then increased and decreased after reaching the maximum.%针对传统曲折槽研究过分依靠仿真的问题，提出了曲折槽机构参数与结构阻尼系数关系模型。该模型建立了弹簧-质量-阻尼系统，分析了结构阻尼系数与载荷区分性能的关系，并根据结构阻尼系数与上升时间的关系推导出了曲折槽参数对于结构阻尼系数的影响趋势。通过 ANSYS 仿真与 MATLAB 曲线拟合，验证了以上推导的正确性。结果表明，当曲折槽倾角或锚槽间隙较小时(槽倾角2α<82.5°，锚槽间隙 h <0.02 mm)，结构阻尼系数 c 随槽倾角、锚槽间隙增大呈递减趋势；当2α趋近于90°、h 趋近于0.05时，阻尼系数 c 随着参数的增大而逐渐递增；当槽倾角或锚槽间隙进一步增大时，阻尼系数 c 随着参数的增大而持续减小。