山东省自然科学基金项目(ZR2021QE101), 东省重点研发计划（重大科技创新工程）项目(2021CXG010701), 国家自然科学基金项目(52088102, 51879249)
1.Sinopec Petroleum Engineering Corporation;2.Ocean University of China
Shandong Provincial Natural Science Foundation of China (Grant No. ZR2021QE101), the Key Research and Development projects of Shandong Province (Grant No. 2021CXG010701)，National Natural Science Foundation of China (Grant No. 52088102，51879249)
The polymer injection is often adopted to improve the recovery rate of the aged oil field. However, the continuous low-frequency and high-amplitude vibration of the polymer injection pumps will cause the cumulative fatigue damage of the polymer injection platform inevitably. Therefore, it is vital important to investigate the impact of polymer injection pumps on the platform and mitigate the vibration response of the platform. A dynamic analysis model of the polymer injection platform under the action of multiple polymer injection pumps is established with the Abaqus software, and the influence of pumps’ location, pump’s number and pump’s start instants on the vibration intensity of the platform are investigated in detail. In addition, a labyrinthine constrained damping isolation base is proposed according to the passive vibration isolation principle, and the performance of the damping base are numerically studied. Numerical results show that the vibration intensity of the platform increases linearly as the number of pumps increases. The vibration loads will cancel each other for the pumps start up at different instants, resulting in a significant reduction in the vibration intensity of the platform. In addition, the labyrinthine constrained damping isolation base can reduce the vibration intensity of the platform in multiple degree-of-freedoms significantly, and the isolation percentage can reach to 20%.