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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Dynamic analysis of a slider-crank mechanism with two types of non-ideal revolute joints
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Dynamic analysis of a slider-crank mechanism with two types of non-ideal revolute joints

机译：具有两种非理想旋转关节的曲柄滑块机构的动力学分析

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摘要

Rolling element bearings and journal bearings are typical components comprising a revolute joint in a mechanical system. In the traditional dynamic analysis of multi-body systems, these two types of bearings are generally treated as ideal revolute joints and are modelled by kinematic constraints. The non-linearity of such bearings including internal radial clearance, local contact deformation, friction, lubrication and other phenomena associated with real joints are routinely ignored. In this work, an approach to the dynamic modelling of a multi-body system with these two types of non-ideal revolute joints is outlined. These non-ideal joints were modelled by their force interaction. In rolling element bearings, the frictionless multi-point contacts and bearing kinematics are considered. In the case of a journal bearing, the normal contact force and tangential dry friction force are considered. A planar slider-crank mechanism with multiple non-ideal revolute joints including a rolling ball bearing and two journal bearings is presented as a numerical example to demonstrate application of this approach. The variations of slider kinetic characteristics and the bearing reaction force are used to expound the dynamic characteristics of the mechanism when multiple non-ideal revolute joints are considered.
机译：滚动轴承和轴颈轴承是典型的组件，包括机械系统中的旋转接头。在传统的多体系统动力学分析中，这两种类型的轴承通常被视为理想的旋转关节，并通过运动学约束进行建模。通常会忽略此类轴承的非线性，包括内部径向游隙，局部接触变形，摩擦，润滑和与真实关节相关的其他现象。在这项工作中，概述了使用这两种类型的非理想旋转关节对多体系统进行动态建模的方法。这些非理想的关节是通过它们的力相互作用来建模的。在滚动轴承中，考虑了无摩擦的多点接触和轴承运动学。对于轴颈轴承，应考虑法向接触力和切向干摩擦力。作为数值示例，提出了具有多个非理想的旋转接头（包括滚动球轴承和两个轴颈轴承）的平面滑块-曲柄机构，以演示此方法的应用。当考虑多个非理想的旋转接头时，使用滑块动力学特性和轴承反作用力的变化来阐明机构的动力学特性。

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