井下原位测量装置推靠机构力学分析及仿真

Dynamic Analysis and Simulation of the Downhole in Situ Measuring Device Push-back System

为进一步提高井下原位测量装置推靠机构的传动性能,采用复数矢量法建立了井下原位测量装置推靠机构的数学分析模型,推导出了各构件的位置方程、速度方程及加速度方程,并在运动学分析解得各部件的加速度的基础上又进行了各部件的动态静力学分析,得到推靠系统各杆件运动参数,真实反映推靠系统的实际运动状况。通过MATLAB建立推靠机构数学分析模型,得出该模型运动学特性理论变化曲线,当θ1=29.3°时,推靠机构推靠杆推靠最大行程达到257mm。基于ADAMS仿真平台,建立了推靠机构的运动学仿真模型,并进行了运动学分析。将得到仿真分析结果与数学分析模型进行对比,验证了所建立的井下原位测量装置推靠机构运动学数值分析模型与运动学仿真分析的正确性,为井下原位测量装置推靠机构的优化设计提供了依据。

In order to further improve the transmission performance of the push mechanism of the downhole in-situ measurement device,the mathematical analysis model of the push mechanism of the downhole in-situ measurement device was established by using the complex vector method,the position equation,velocity equation and acceleration equation of each component were derived,and the dynamic static analysis of each component was carried out on the basis of the kinematics analysis to obtain the acceleration of each component,and the motion parameters of each member of the push system were obtained,the actual motion of the pushing system was truly reflected.The mathematical analysis model of the pusher mechanism was established through MATLAB,and the theoretical variation curve of the kinematic characteristics of the model was obtained.When θ1=29.3°,the maximum stroke of the push rod of the push mechanism reached 257 mm.Based on ADAMS simulation platform,the kinematics simulation model of the push mechanism was established,and the kinematics analysis was carried out.The simulation analysis results are compared with the mathematical analysis model,which verifies the correctness of the established kinematics numerical analysis model and kinematics simulation analysis of the pushing mechanism of the downhole in-situ measuring device,and provides a basis for the optimization design of the pushing mechanism of the downhole in-situ measuring device.