间隙铰链对平面机构碰撞动力学特性影响分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (17) : 74-78.

论文

王旭鹏,刘更,马尚君,佟瑞庭

作者信息 +

Analysis of Clearance Joint on the Dynamic Characteristics of Planar Mechanism

WANG Xu-peng, LIU Geng，MA Shang-jun, TONG Rui-ting

Author information +

文章历史 +

摘要

为了研究间隙铰链对机构动态性能的影响，本文首先建立了一种含轴向尺寸的线接触碰撞铰模型，在此基础上提出一种改进的非线性法向碰撞力模型和修正的切向库伦摩擦力模型，以平面含间隙铰链曲柄滑块机构为研究对象，通过不同间隙值下的滑块加速度、间隙铰链处接触力、加速度频谱以及速度-加速度相图分析，研究了间隙值对机构碰撞动力学特性的影响规律。研究结果表明：间隙会导致机构动态性能出现明显的振荡现象，且随着间隙值的增大，振荡加剧、振荡幅值上升，但振荡频率降低；同时，在间隙铰链的影响下，机构动态特性呈现出非线性现象,且间隙越大，非线性现象越明显。

Abstract

The main purpose of this work is to study the effect of clearance joint on the dynamic characteristics of planar mechanism. At first, a clearance contact model with axial dimension is presented. Based on an improved nonlinear impact force model and a modified coulomb friction force model, the dynamic characteristics of a planar slider-crank mechanism with clearance joint are analyzed under different clearance sizes.The results point out that the lager clearance size, the more obviousshake of dynamic characteristics, but lower vibration frequency. Meanwhile, with the effect of clearance joint, the mechanism exhibits nonlinear characteristics.

导出引用

王旭鹏,刘更,马尚君,佟瑞庭. 间隙铰链对平面机构碰撞动力学特性影响分析[J]. 振动与冲击, 2017, 36(17): 74-78

WANG Xu-peng, LIU Geng，MA Shang-jun, TONG Rui-ting. Analysis of Clearance Joint on the Dynamic Characteristics of Planar Mechanism[J]. Journal of Vibration and Shock, 2017, 36(17): 74-78

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