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Design method for solving strong nonlinear time domain water elasticity problem based on improved moving particle semi-implicit method and modal superposition method

A modal superposition and nonlinear technology, applied in the field of ship engineering, can solve the problem of not considering the interaction between rigid body and elastic mode, and achieve the effect of avoiding the difficulty of grid processing

Inactive Publication Date: 2020-02-04
DALIAN UNIV OF TECH
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Problems solved by technology

However, in traditional hydroelastic analysis, the interaction between the rigid body and the elastic modes is not considered, and the rigid body and elastic parts are only related to each other in the sense of the hydrodynamic coefficient of the cross term

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  • Design method for solving strong nonlinear time domain water elasticity problem based on improved moving particle semi-implicit method and modal superposition method
  • Design method for solving strong nonlinear time domain water elasticity problem based on improved moving particle semi-implicit method and modal superposition method
  • Design method for solving strong nonlinear time domain water elasticity problem based on improved moving particle semi-implicit method and modal superposition method

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[0136] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0137] Such as Figure 1-Figure 9 As shown, a design method based on the improved semi-implicit method of moving particles and mode superposition method to solve the strongly nonlinear time-domain hydroelastic problem decomposes the solution into several time periods with small intervals in the time domain, assuming that the previous The tim...

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Abstract

The invention discloses a design method for solving a strong nonlinear time domain water elasticity problem based on an improved moving particle semi-implicit method and a modal superposition method.The method is based on a fluid dynamic solver of an improved moving particle semi-implicit method (MPS) and a structural response solver of a mode superposition method based on a coupling rigid body and an elastic mode, and the fluid dynamic solver and the structural response solver achieve strong coupling in a time domain in an iterative mode. According to the method, the defect that the traditional potential flow-based water elasticity calculation cannot directly simulate the severe deformation of the free surface and the slamming phenomenon of the ship body is overcome, and the problem of mutual influence between the rigidity of the structure and the flexible motion mode is considered.

Description

technical field [0001] The invention relates to a design method for solving a strongly nonlinear time-domain hydroelastic problem based on an improved moving particle semi-implicit method (MPS) and a mode superposition method, belonging to the field of ship engineering. Background technique [0002] The trend towards larger and faster ships and marine structures brings the natural frequency of the structure and the frequency of the waves it encounters into the same range. This means that hydroelastic effects are becoming more and more important for the overall fatigue analysis of marine structures. [0003] Structural integrity analysis in this case requires time domain simulation. Traditional potential flow-based solvers cannot directly simulate the severe deformation of the free surface during slamming, which requires a CFD-based solver for flow calculations, and a partial combination or full application of viscous flow-based CFD models is hydroelastic calculations ultim...

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Application Information

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IPC IPC(8): G06F30/15G06F119/14
CPCG06F30/15G06F16/00Y02T90/00G06F30/25G06F30/28B63B71/10G06F2111/10
Inventor 孙哲邓彦增张桂勇宗智
Owner DALIAN UNIV OF TECH
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