基于复数矢量分析的汽车起重机液压变幅机构优化设计

Optimization Design of Hydraulic Luffing Mechanism of Truck Crane Based on Complex Vector Analysis

当前液压变幅机构设计方法采用手工绘图的方式来确定铰点位置,导致液压变幅机构运动性能较差,无法满足现代汽车起重机重要部件设计标准。为了解决上述问题,提出了基于复数矢量分析的汽车起重机液压变幅机构优化设计。首先依据汽车起重机液压变幅机构模型,对主臂、转台以及液压变幅三铰点进行优化。然后利用复数矢量分析原理,对液压变幅机构受力展开分析,通过调用不同矢量下的编制子程序,对机构位置、速度、加速度进行优化,保证其在质量、质心和转动惯量矩方面一致性,由此完成汽车起重机液压变幅机构优化设计。最后通过联合仿真及运动学实验分析可知,所提方法无论是角位置、角速度,还是角加速度均比传统方法更贴近联合仿真运动规律,能够有效保证液压变幅机构运动良好性能。

At present,the design method of hydraulic luffing mechanism adopts the method of manual drawing to determine the hinge point position,which results in the poor motion performance of hydraulic luffing mechanism and can not meet the design standard of important parts of modern truck crane.In order to solve the above problems,the optimization design of hydraulic luffing mechanism of truck crane based on complex vector analysis is proposed.Firstly,according to the hydraulic luffing mechanism model of truck crane,the main boom,turntable and hydraulic luffing three hinge points are optimized.Then,using the principle of complex vector analysis,the force of the hydraulic luffing mechanism is analyzed,and the position,speed and acceleration of the mechanism are optimized by calling the programming subroutines under different vectors,so as to ensure its consistency in mass,center of mass and moment of inertia,so as to complete the optimal design of the hydraulic luffing mechanism of the truck crane.Finally,through the joint simulation and kinematic experiment analysis,it can be seen that the proposed method is more close to the joint simulation motion law than the traditional method in terms of angular position,angular velocity and angular acceleration,which can effectively ensure the good performance of the hydraulic luffing mechanism.