月壤采样器钻进动力学分析与试验研究

发布时间：2018-05-25 01:39

本文选题：月球钻取采样器 + 动力学　；参考：《中国矿业大学（北京）》2012年博士论文

【摘要】：月壤钻取采样器中,细长钻杆的运动有回转、轴向冲击及进给。文中分别建立了采样器中钻机回转运动系统的驱动电机转子、齿轮传动、钻杆动力学方程；钻杆轴向受压与受扭的耦合动力学方程；采样器中电机驱动滚筒,滚筒缠绕钢丝绳拉动钻机,钻机推动钻杆轴向进给运动的系统动力学模型及方程。应用Runge-Kutta法和Matlab软件求解了上述动力学方程,对钻杆在不同的复杂动载荷作用下的响应和非线性特性进行了分析,研究了系统动力学特性及主要参数对钻进性能的影响。建立了考虑钻杆受轴向压力和与钻杆轴线倾斜的月球低重力作用下简支梁式支承钻杆的横向弯曲非线性振动方程,采用摄动多尺度法得出主共振渐进解；分析了幅频响应、运动稳定性、振幅突变性等,并进行了幅频响应的试验研究。建立了中间简支梁式支承、端部悬臂梁式支承的钻杆复杂振型的非线性方程,对钻杆振动和稳定性进行了分析。上述研究工作为确保钻杆钻进过程中安全、可靠和采样器的参数设计提供了理论基础。研制了一种无人自主钻取式采样器样机,用于对月球表面下月壤自动采样与收集。在实验室完成的采样器功能、性能试验显示,在取芯、冲击回转钻进、样品缠绕整形及回收等关键技术方面获得成功,为我国探月采样及未来深空探测采样技术做了基础性工作。
[Abstract]:In the sampler of lunar soil drilling, the movement of slender drill pipe includes rotation, axial impact and feed. In this paper, the dynamic equations of driving motor rotor, gear drive and drill pipe in the rotary motion system of drilling rig in sampler, coupling dynamic equation of axial compression and torsion of drill pipe, driving drum of motor in sampler, are established respectively. The system dynamic model and equation of roller winding wire rope pulling rig and drilling rig pushing the axial feed motion of drill pipe. The above dynamic equations are solved by using Runge-Kutta method and Matlab software. The response and nonlinear characteristics of drill pipe under different complex dynamic loads are analyzed. The dynamic characteristics of the system and the influence of main parameters on drilling performance are studied. In this paper, the nonlinear vibration equation of lateral bending of simply supported drill pipe is established under the influence of low gravity of the moon under axial pressure and inclined axis of drill pipe. The asymptotic solution of main resonance is obtained by using perturbation multi-scale method, and the amplitude frequency response is analyzed. Motion stability, amplitude mutation and so on, and the experimental study of amplitude frequency response are carried out. The nonlinear equations of complex modes of drill pipe supported by intermediate simply supported beam and end cantilever beam are established, and the vibration and stability of drill pipe are analyzed. The above work provides a theoretical basis for ensuring the safety, reliability and parameter design of the sampler during drill pipe drilling. A prototype of an unmanned self-drilling sampler is developed for automatic sampling and collection of lunar soil under the lunar surface. The function and performance tests of the sampler completed in the laboratory show that the key technologies, such as coring, percussive drilling, sample winding, shaping and recovery, are successful. The basic work has been done for Chinese lunar exploration sampling and deep space exploration sampling technology in the future.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2012
【分类号】：P184.5

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