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

Non-linear static analysis method for deep-sea slow-wave umbilical cables

A static analysis and umbilical cable technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to effectively analyze deep-water slow-wave umbilical cables, and achieve high accuracy and reliability.

Inactive Publication Date: 2017-05-31
宁海县浙工大海洋研究院
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the prior art cannot effectively analyze deep-water slow-wave umbilicals, the present invention provides a nonlinear static analysis method for deep-sea slow-wave umbilicals that can effectively analyze deep-water slow-wave umbilicals

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
  • Non-linear static analysis method for deep-sea slow-wave umbilical cables
  • Non-linear static analysis method for deep-sea slow-wave umbilical cables
  • Non-linear static analysis method for deep-sea slow-wave umbilical cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] refer to Figure 1 to Figure 7 , a method for nonlinear static analysis of deep-sea slow-wave umbilical cables, comprising the following steps:

[0034] Step 1: Theoretical Assumptions

[0035] In the actual installation project, due to the influence of seabed, wind wave current and hull motion, the nonlinear static analysis of slow wave umbilical cable in deep water is relatively complicated. In order to facilitate theoretical analysis and research, the following simple assumptions are made:

[0036] 1.1) The coupling effect of the hull is not considered, and the influence of wind load is ignored.

[0037] 1.2) Only the dragging hydrodynamic effect of the ocean current is considered, and the wave effect is not considered.

[0038] 1.3) The seabed is simplified as a horizontal Winkel foundation beam model, that is, the vertical resistance of the seabed can b...

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 relates to a non-linear static analysis method for deep-sea slow-wave umbilical cables, which includes the following steps: (Step 1) theoretical assumption; (Step 2) creation of a mechanical analysis model: Because of the thin and long characteristic of an umbilical cable, the configuration of the umbilical cable is described with the position of the central axis of an umbilical cable pipeline according to a classical theory, divided into a spanning section and a touchdown section; (Step 3) setting of boundary conditions: The umbilical cable is connected to surface floating devices through bend limiters, the connection is simplified as articulated connection, and thereby the boundary condition of a layout point (LOP) is determined; and taking the diameter influence of the umbilical cable into account, the boundary condition of a touchdown point (TDP) is determined; (Step 4) numerical solvent: Once top tension T0 is determined, the configuration of each differentiation element is worked out sequentially from the top by the recurrence method, and thereby the overall slow-wave configuration of the umbilical cable is obtained. The non-linear static analysis method can effectively implement analysis on deep-sea slow-wave umbilical cables. In the process of solvent, the top tension T0, spanning section length and touchdown point location of the umbilical cable are unknown, only the top layout angle Theta 0 is a known parameter, and numerical solvent needs to be carried out by iterative operation; once the top tension T0 is determined, the configuration of each differentiation element is worked out sequentially from the top by the recurrence method, and thereby the overall slow-wave configuration of the umbilical cable is obtained.

Description

technical field [0001] The invention relates to a nonlinear static analysis method of deep-sea slow-wave umbilical cord. Background technique [0002] In deep-sea oil and gas exploitation projects, umbilical cables, as an important part of the underwater production system, play an important role in connecting surface floating devices and subsea oil wells, and are the lifeline of the offshore oil and gas underwater production system. As the offshore oil and gas exploration project continues to advance to the deep sea, the tension on the top of the umbilical cable continues to increase due to the increase in water depth. In order to avoid excessive tension at the top of the deepwater umbilical cable, the slow wave configuration is widely used in deepwater oil and gas development due to its characteristic of effectively reducing the top tension. However, the introduction of the buoyancy block system in the slow-wave configuration makes its nonlinear characteristics more and mo...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 戴伟孙毅阮伟东
Owner 宁海县浙工大海洋研究院
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