齿轮传动环向铅剪切阻尼器的试验研究与数值模拟
首发时间:2020-01-22
摘要:金属屈服型阻尼器通常存在疲劳损伤后需要更换和不易满足大行程要求的问题,提出一种齿轮传动环向铅剪切阻尼器。基于材料常温动态回复再结晶性能,并通过齿轮齿条配合使该阻尼器具有理论上无疲劳损伤及无位移上限的优良特征。根据核心耗能部件的构造对三个不同剪切轴截面的模型试件进行了数值模拟和试验研究,选择最优构剪切轴截面方案设计加工了齿轮传动环向铅剪切阻尼器,通过性能试验对该阻尼器的滞回性能、疲劳性能进行研究。基于有限元分析和试验结果,对该阻尼器耗能机理进行分析。结果表明:该型阻尼器滞回性能稳定,可实现大行程加载,多次加载后基本无疲劳损伤效应;其耗能机理包含铅材屈服和侧向钢-铅摩擦两部分,其中铅材屈服为主,但摩擦作用不可忽略。
关键词: 铅阻尼器 环向剪切 齿轮传动 钢-铅摩擦 数值模拟
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Experimental study and numerical simulation of a ring shear lead damper for gear transmission
Abstract:The metal yield damper usually needs to be replaced after fatigue damage and is not easy to meet the requirements of large stroke. A kind of ring shear lead damper for gear transmission is proposed. Based on the dynamic recovery recrystallization property of the material at room temperature, the damper has the excellent characteristics of no fatigue damage and no upper limit of displacement in theory through the combination of gear and rack. According to the structure of the core energy dissipation components, the numerical simulation and experimental research are carried out on three model specimens with different shear axis sections, and the optimal shear axis section scheme is selected to design and process the ring shear lead damper of gear transmission. The hysteretic performance and fatigue performance of the damper are studied through the performance test. Based on the finite element analysis and test results, the energy dissipation mechanism of the damper is analyzed. The results show that the hysteretic performance of the damper is stable, it can achieve large displacement loading, and there is basically no fatigue damage effect after multiple loading. The energy dissipation mechanism of the damper includes two parts: lead material yield and side steel lead friction, in which lead material yield is the main part, but the friction effect can not be ignored.
Keywords: lead damper ring shear gear transmission steel-lead friction numerical simulation
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齿轮传动环向铅剪切阻尼器的试验研究与数值模拟
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