基于剛柔耦合模型的鉆具自動輸送裝置動態(tài)特性研究
[Abstract]:In recent years, with the rapid development of China's economy and science and technology, the requirements for marine drilling technology and continental scientific drilling technology are more and more high. Compared with offshore drilling, the research investment of continental scientific drilling technology is obviously less, and drilling tools. A large proportion of the transportation and discharge work on the bottom drilling table is still carried out with the traditional drilling tool migration device in the 1960s and 1970s. This device is mainly manual work, and the whole migration process can be completed by the cooperation of four or five people. The workers' work efficiency is low and the labor intensity is high. The safety guarantee is low, the safety accident is easy to happen, and the operation process lacks the effective protection to the drill pipe wire buckle, and the drill pipe is easy to be damaged. In addition, with the development of modern terrestrial scientific drilling technology in the direction of deep wells, horizontal wells with long reach, and ultra-deep wells, for example, the coring depth of continental scientific drilling has reached more than 10,000 meters, the drilling site will carry and discharge drilling tools in large quantities. Therefore, drilling site requires high degree of mechanization and automation, strong transportation capacity, safety and reliability, high stability to carry out the transportation of drilling tools. The automatic conveying device of drill pipe developed by our research group has high technical requirements, the whole operation process is safe, and the degree of automation is high. Only 1 or 2 people can carry out the whole operation process, and the time of one drill pipe conveyance is 50 seconds to three minutes. At the same time, the working intensity of the workers is reduced and the conveying efficiency of the drill pipe is improved, thus the time for shortening the operation period of the whole drilling system and the degree of mechanization and automation of the land drilling rig are increased. Therefore, the automatic conveyer of drilling tools has a high research value. Based on this, this paper focuses on the dynamic characteristics of the system under the rigid-flexible coupling model through system dynamic modeling and simulation analysis, taking the automatic conveying device of drilling tools as the research object. Firstly, according to the design requirements and work flow of the automatic conveyer, the overall structure and working process of the device are expounded. Based on the kinematics analysis of the lifting system, the main control mode is studied, and the lifting mode of the main body is determined, and the relevant parameters of the key components in the system are analyzed and calculated. Then, the partition principle of rigid and flexible parts of the whole machine is analyzed in detail, and the MNF neutral file of flexible parts of the system is established. The corresponding constraints, driving and contact collision attributes are added to the simulation model. The rigid-flexible coupling model of the whole machine is established in ADAMS software. Then, through the numerical solution and simulation analysis of the vibration modes of the braces, the characteristics of the main modes of each order in the easy frequency range are studied. It lays a theoretical foundation for predicting the actual vibration response of the structure under various external or internal vibration sources in this frequency band, and compares the modal information of the flexible body in the previous chapter, which verifies the correctness of the flexible body modeling. Harmonic response analysis is carried out to study the response of external excitation to various frequencies. The buckling analysis of the key components of the system is carried out, and the stability information related to its structure is obtained. Then, the rigid-flexible coupling dynamic modeling of the whole machine is carried out and the main reasons for the dynamic stiffening of the system are studied. Through the rigid-flexible coupling simulation analysis of the whole machine, the dynamic characteristics under the rigid-flexible coupling model and the multi-rigid body model are compared and studied. The kinematics and dynamics data of the system under coupling effect are obtained. Finally, the correctness of the simulation results and the practical performance of the device are verified by experimental verification.
【學位授予單位】:吉林大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TE951
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