Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hydraulic transient simulation method and device based on Lagrange meshless particle method

A hydraulic transient and simulation method technology, applied in the field of hydraulic transient simulation, can solve problems such as large errors, poor applicability, and large amount of calculation, and achieve the effects of easy implementation, avoiding difficult calculations, and easy expansion

Inactive Publication Date: 2020-06-26
HOHAI UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a hydraulic transient simulation method and equipment based on the Lagrangian gridless particle method, which solves the shortcomings of existing simulation analysis methods such as poor applicability, large amount of calculation, and large errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydraulic transient simulation method and device based on Lagrange meshless particle method
  • Hydraulic transient simulation method and device based on Lagrange meshless particle method
  • Hydraulic transient simulation method and device based on Lagrange meshless particle method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0053] The invention provides a hydraulic transient simulation method based on the Lagrangian gridless particle method, such as figure 1 shown, including:

[0054] S101 establishes the hydraulic transient basic differential equation, determines the calculation domain, collects the initial parameters and determines the boundary conditions according to the example of the water transfer project to be simulated.

[0055] Specifically, the basic differential equation of hydraulic transient is:

[0056]

[0057]

[0058] Among them, the distance along the pipeline x and time t are independent variables; P(x,t) is the piezometer pressure; V(x,t) is the average section velocity; g is the acceleration of gravity; c is the wave velocity; Weissbach Mo resistance coefficient; D is the pipe diameter.

[0059] The initial parameters collected include: initial inle...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a hydraulic transient simulation method based on a Lagrange meshless particle method, which comprises the following steps: establishing a hydraulic transient basic differentialequation, determining a computational domain according to a to-be-simulated water conveyance project instance, collecting initial parameters and determining boundary conditions; arranging calculationparticles in the calculation domain, and arranging virtual particles at the boundary; based on a smooth particle method, performing step-by-step interpolation integration on the function by adoptinga kernel approximation method to obtain a kernel function and a kernel function derivative; adopting a particle approximation method to obtain a particle discrete equation of a kernel function and a particle discrete equation of a kernel function derivative, and further solving a momentum equation and a continuity quality equation; and based on a particle discrete equation of a kernel function derivative, calculating the next time step through an Euler time integral method. Accurate numerical simulation can be performed on hydraulic transient in a water delivery pipeline system, artificial viscosity is introduced to suppress false numerical oscillation, engineering risks can be avoided, and the safety of a hydraulic system is protected.

Description

technical field [0001] The invention relates to hydraulic numerical simulation of water delivery engineering, in particular to a hydraulic transient simulation method and equipment based on the Lagrangian gridless particle method. Background technique [0002] In the water delivery project, when the valve in the water delivery pipeline opens and closes quickly, or the pump opens and closes suddenly, hydraulic transients may occur, which may cause damage to the water delivery pipeline and lead to serious accidents. Therefore, the analysis and evaluation of hydraulic transient problems is very important for the design and safe operation of pipeline systems. [0003] Among the existing simulation analysis methods for hydraulic transient phenomena in pipeline systems, the most widely used method is the numerical calculation method based on grid form, namely the characteristic line method (MOC), the finite difference method (FDM) and the finite volume method ( FVM). Although th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/20G06N3/00G06F119/14
CPCG06N3/006
Inventor 周领潘天文方浩宇王沛曹云薛子剑李赟杰
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com