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The isolation plugging tool is normally developed for deep water pipeline repairing. It is a mechanical structure of plugging and sealing fluid in high-pressure pipelines to make sure the pipe maintenance operation under normal transmission. In order to design control the plugging tool, the analysis of underlying flow field physics in pipeline is necessary based on the in-situ situation. The flow...
For the vibration of the aero pipeline and the conveying pipeline exists universally and the vibration has effects on the pipeline life, the detection accuracy and the system stability, the research on the natural characteristic of the pipeline vibration has promising prospects. In this paper, the vibration mathematical model is built with the simple and practical Rayleigh-Ritz energy method to calculate...
Heavy forgings quality and production capacity represent an important symbol of the level of the country's industrial development. Large water press is the equipment for heavy forgings forming, and it's essential to improve the control performance of power transmission system. In this paper, the mathematical models of the key elements for fluid power transmission system, including water pump, accumulator,...
In this paper we present an efficient GPU pipeline to perform high quality fluid simulation using CUDA. Our method extends standard weakly compressible smoothed particles hydrodynamics to realistically handle complex boundaries. We design a GPU pipeline of the proposed approach and map the entire components of the pipeline to CUDA kernels and data structures, fully exploiting the massive computational...
The inner inspection tool move based on the liquid or gas pressure differential in the oil pipeline to inspect the defect of the pipe. In order to improve the detection precision, the inspection tool should keep constant speed and robust state in different situation. This paper established the model of inner inspection tool based on drainage hole. Though analyzing the driving force and the frictional...
This paper deals with the kinematics and dynamics of an in-pipe underwater swimming robot. To provide a basis for the structure design and motion control of the in-pipe swimming robot, the dynamics and kinematics model of 6-DOF spatial motion in a specific three-dimensional pipeline are established. The Dynamics characteristic performances and the needed driving force when the robot swims along the...
The erecting process of a hydraulic erecting system was studied based on electro-hydraulic similarity principle, with the numerical simulation of the rapid-erection system of a multi-function missile launching vehicle as an example. The system modeling was based on ??knot point balance method??. The pressure-flow rate characteristics of hydraulic elements and cubage cavity were analyzed based on mathematic...
Electromagnetic flowmeter was adopted to measure the flow quantity of coal water slurry (CWS) transport pipeline, and the average flow velocity of pipeline was calculated by using the measured inductive electromotive force value. Then the Reynolds number of fluid in the pipeline was calculated and the fluid in the CWS transport pipeline was proved to be flowing in the laminar flow state. The axial...
In 3D computer graphics, it has been an important issue to describe a virtual object realistically and show it in a physically correct manner. Unlike the virtual reality(VR), the augmented reality (AR) is an environment containing virtual and real objects simultaneously. However, the difference in motion between the virtual and real objects is obvious, which makes it hard for AR to be realistic and...
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