WTZ350车载式物探钻机井架动力学分析与优化

发布时间：2018-09-09 12:23

【摘要】：随着东部平原地区油气资源的开采殆尽与勘探重点逐步转移到中西部多山多丘陵地带,对车载式物探钻机的数量和质量提出了更高的要求。桅形井架作为物探钻机的重要组成部分,是钻井设备钢结构件中制造难度最大、设计要求最高的设备之一。因此,车载式物探钻机井架的可靠性、安全性等显得尤为重要。本文针对新设计的WTZ350车载式物探钻机为对象,对钻机井架在实际工程中经常出现的问题进行了理论分析计算和数值模拟仿真分析。首先对钻机井架进行了静力学分析。包括钻机井架在9种比较危险工况下的静力等效分析和最危险工况下基于能量法、势能驻值原理、瑞利里兹法的平面内和平面外稳定性研究。得出钻机井架在满足强度、刚度和稳定性条件下的井架材料选择。然后对钻机井架进行了动力学分析。包括6种工况下的模态分析和谐响应分析验证、和1种工况下的瞬态响应分析。得到并验证了钻机井架在6种工况下的振型、固有频率和提升钻进卡钻工况下的振动主要发生在弯矩作用平面内水平方向。其次对钻机井架进行了72种工况的全实验加权疲劳寿命分析。得到钻机井架发生疲劳失效的安全系数为4.9,满足疲劳寿命要求,其中疲劳失效的薄弱点在动力头支架滚轮处。最后对钻机井架进行了基于CREO与AWB(ANSYS Workbench)协同仿真下的多目标遗传算法尺寸优化和在此基础上的形状优化。通过尺寸优化使得在质量变化不大的情况下,井架最大应力和最大位移分别减小了26%和33%,通过形状优化验证了尺寸优化的合理性。
[Abstract]:With the exhaustion of oil and gas resources in the eastern plains and the gradual shift of exploration emphasis to the mountainous and hilly areas in the central and Western regions, higher requirements have been put forward for the quantity and quality of vehicle-mounted geophysical drilling rigs. Therefore, the truck-mounted geophysical drilling rig derrick reliability, safety and so on is particularly important. In this paper, the new design of the WTZ350 truck-mounted geophysical drilling rig as the object of study, drilling rig derrick in practical engineering problems often occur theoretical analysis, calculation and numerical simulation analysis.
Firstly, the static analysis of rig derrick is carried out, including the static equivalent analysis of rig derrick under 9 kinds of dangerous working conditions and the study of derrick material under the condition of strength, stiffness and stability based on energy method, principle of potential energy stationary value and Rayleigh Ritz method. Material selection.
Then the dynamic analysis of the rig derrick is carried out, including modal analysis and harmonic response analysis under six working conditions, and transient response analysis under one working condition.
Secondly, the full-test weighted fatigue life analysis of the rig derrick under 72 working conditions is carried out. The result shows that the safety factor of fatigue failure of the rig derrick is 4.9, which meets the fatigue life requirements. The weakness of fatigue failure is at the roller of the power head support.
Finally, a multi-objective genetic algorithm based on CRO and AWB (ANSYS Workbench) is used to optimize the size and shape of the derrick. The maximum stress and displacement of the derrick are reduced by 26% and 33% respectively, and the size is verified by shape optimization. The rationality of optimization.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE922

【参考文献】