基于刚柔耦合仿真模型的高地隙喷雾机转向机构特性

doi:10.13229/j.cnki.jdxbgxb201503025

摘要/Abstract

摘要： 针对高地隙自走式喷雾机转向系统复杂的运动学、动力学等转向特性,建立其数字样机,并在此基础上,考虑转向机构的大变形运动与构件的结构变形的相互耦合问题,对转向油缸固定支架柔性化处理,分析转向机构运动过程中的柔性体与刚性体耦合时的运动学、动力学特性,并与全刚体构件的转向机构进行了对比,结果表明:转向油缸固定支架柔性化后,与刚性体相比,角位移、角速度、铰接处的接触力均有较大幅度的增加,进一步对等效应力、总变形变化进行仿真,结果表明:柔性固定支架满足转向系统使用要求。

关键词: 机械设计, 高地隙喷雾机, 转向机构, 刚柔耦合, 转向特性

Abstract: The rigid body dynamics is widely used in current research of the digital prototype of agricultural equipment without considering the mutual coupling problem between the large displacement of component movement and small displacement of the structural deformation. For the complex dynamic characteristics of steering system in high clearance boom sprayer, a digital prototype of steering system is established with flexible part of steering hydro-cylinder fixation. The influence of the flexible-body fixation in the steering system on its performance is researched. The kinematics and dynamics characteristics of the rigid-flexible coupling influence component movement are revealed. Compared with whole rigid components, the results show that the maximum angular displacement, angular velocity and contact force at hinged place are increased dramatically considering the rigid-flexible coupling. Analysis results of equivalent stress and translational displacement show that the strength of the flexible fixation meets the application requirements.

Key words: mechanical design, high clearance sprayer, steering system, flexible-rigid coupling, steering characteristics

中图分类号:

TH113.2

杨方飞, 闫光, 郝云霄, 刘克格. 基于刚柔耦合仿真模型的高地隙喷雾机转向机构特性[J]. 吉林大学学报(工学版), 2015, 45(3): 857-863.

YANG Fang-fei, YAN Guang, HAO Yun-xiao, LIU Ke-ge. Study on the characteristics of steering system for high clearance sprayer based on rigid-flexible coupling simulation model[J]. 吉林大学学报(工学版), 2015, 45(3): 857-863.

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