Abstract
This paper analyzes the transverse vibration laws of 5000 m ladder-shaped mining pipe under different towing velocities and accelerations in the ocean, thinking of the pipe as the beam model, discretized based on the FEM. The algorithm is used to solve the problem to obtain the transverse vibration law. The research shows that the mining pipe overall transverse vibration trend decreases first and then increases, the minimum vibration value occurs at 3000 m, and the maximum occurs at the top. Increasing the towing velocity, acceleration, and ore bin weight will increase the transverse vibration value. The vibration intensity produced by the same acceleration in the constant acceleration and deceleration stages is different, and the damping effect after adding the same damping is also different. In the range of 0.01 m/s2–0.1 m/s2, the vibration reduction effect after adding damping in the constant deceleration stage is more significant, and in the range of 0.1 m/s2-0.2 m/s2, the vibration reduction effect after adding damping in the constant acceleration stage is more significant. In the stage of the constant acceleration or deceleration, when adding the same damping, the vibration intensity generated by the large acceleration is still far greater than the vibration intensity generated by the small acceleration, so the mining ship should keep the small acceleration for towing motion.
Highlights
With the growth of the world population and the economy rapid development, the demand for metal mineral resources in various countries is increasing day by day [1]
In order to ensure the efficient operation of the mining system, it is necessary to minimize the impact of lateral vibration on the mining pipe system, so it is very meaningful to study the transverse vibration of the mining pipe
The transverse vibration response of the mining pipe is directly related to the towing process of the mining ship, and the whole towing process is shown in Figure 5. w is the variation law of towing velocity with time, 0 − t1 is the constant acceleration stage, t1 − t2 is the constant towing stage, t2 − t3 is the constant deceleration stage, and V is the constant towing velocity
Summary
College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China. Is paper analyzes the transverse vibration laws of 5000 m ladder-shaped mining pipe under different towing velocities and accelerations in the ocean, thinking of the pipe as the beam model, discretized based on the FEM. Increasing the towing velocity, acceleration, and ore bin weight will increase the transverse vibration value. E vibration intensity produced by the same acceleration in the constant acceleration and deceleration stages is different, and the damping effect after adding the same damping is different. In the stage of the constant acceleration or deceleration, when adding the same damping, the vibration intensity generated by the large acceleration is still far greater than the vibration intensity generated by the small acceleration, so the mining ship should keep the small acceleration for towing motion
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