A Reliability Simulation Method of Rope Net Action Based on Improved Mass Amplification Technology
A reliable and high-quality technology, applied in the field of simulation, can solve the problems of long simulation time and shorten the time of dynamic analysis of flexible rope net display, so as to achieve the effect of improving calculation efficiency and solving the inconsistency between calculation time and calculation accuracy.
Active Publication Date: 2016-08-31
BEIHANG UNIV +1
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[0006] The problem solved by the technology of the present invention is: in order to solve the actual problem that the simulation time of the traditional large-deformation flexible rope net is too long during the simulation of the reliability of the action, the present invention provides a method of simulation of the action reliability of the rope net based on improved quality amplification, Based on the dynamic finite element analysis of the rope net, the improved mass amplification method is adopted, which greatly shortens the display dynamic analysis time of the flexible rope net and improves the reliability simulation efficiency of the flexible rope net
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[0021] Mass amplification technology is an important method in the dynamic display algorithm of structural dynamics corresponding analysis. In finite element analysis, the principle of central difference method is used to shorten the time of finite element simulation by increasing the time step of finite element calculation. In the usual finite element method, the time step can be approximately considered as the minimum value of the time consumed by the stress wave passing through any unit grid, so this problem can be solved by increasing the material density, that is, increasing the mass. The advantage of mass amplification technology is that the efficiency of dynamic simulation can be greatly improved by mass amplification, and the time of calculation simulation can be shortened without increasing the length of calculation unit and affecting the calculation accuracy of finite element. However, there is also a problem with the mass amplification technology, that is, if the mas...
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The invention discloses a rope net action reliability simulation method based on improved quality amplification. The invention establishes a quality scaling model of a flexible rope net. During the entire simulation analysis process, the improved quality amplification technology is firstly used to display the rope net. Dynamic analysis, on the basis of dynamic analysis, the RBF neural network method is used to construct the reliability function, and then the importance sampling method is used to simulate the reliability of the rope net action. This method improves the traditional mass amplification technology through the particle swarm optimization algorithm, which maximizes the calculation efficiency of the mass amplification factor in the dynamic simulation analysis of the strongly nonlinear flexible rope net on the basis of ensuring a certain analysis accuracy, and solves the problem. The calculation time and calculation accuracy of the flexible body action reliability simulation can not be balanced, which greatly improves the calculation efficiency.
Description
technical field [0001] The invention discloses a method for simulating the reliability of a rope net action, in particular to a method for simulating the reliability of a rope net action based on improved quality amplification, and belongs to the technical field of simulation. Background technique [0002] As products have higher and higher requirements for reliability, the requirements for reliability analysis and calculation of products are also higher and higher. Large-deformation flexible rope nets are currently playing an important role in the execution of various tasks in daily life, and how to ensure the reliability of the rope net during task execution is also an important issue. The task reliability calculation of the large deformation flexible rope net is a difficult problem at present, which is mainly reflected in the fact that the rope net, as a large deformation flexible body, has strong nonlinear characteristics in the dynamic analysis, which not only gives the...
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IPC IPC(8): G06F17/50G06N3/02
Inventor张建国谭春林彭文胜王丕东马志毅刘永健张青斌
OwnerBEIHANG UNIV