关节式火车煤采样机动应力特性研究

Study on Dynamics Stress Characteristics of Articulated Coal Sampling Machine

为研究关节式双动火车煤采样机工作装置的动应力特性,保证其工作的可靠性,根据实际采样要求,设计了一条采样头末端点的运动轨迹,采用解析几何法建立了工作装置的运动学正、逆解模型,以MATLAB计算得到的旋转马达角位移、液压缸位移与插入阻力为驱动,在ADAMS中对双动采样过程进行仿真,得出工作装置在采样过程中所受载荷随时间的变化曲线,将动态载荷作为负载,利用ANSYS Workbench进行瞬态动力学分析,得到工作装置的动应力特性。结果表明,工作装置在整个采样过程中满足强度要求,可为结构的优化设计提供理论依据,并对分析实际工况和受力情况复杂的机构强度有一定的指导意义。

In order to achieve the goal of studying dynamics stress characteristics for the working device of double action articulation coal sampling machine and to ensure the reliability of its work. A trajectory of the end point of the sampling head is designed according to the actual sampling requirements. The positive solution and inverse solution kinematics models of the working device are established by analytic geometry method. Using the MATLAB to calculate the curve of hydraulic cylinder displacement and motor angular displacement. Then imported it into the ADAMS to simulate the double action sampling process. The stress curve at each hinge pin point along with time of working device during sampling was obtained through simulation. This article made a transient dynamic analysis to the working device by using the curve of each pin point and got the dynamic stress result. The result shows that working device meets the strength requirements, it provides theoretical basis for structural optimization design and has directive significance for analyzing the strength of mechanism that working condition and force is complicated.