Method for making equivalent space discrete-grid vibration elasticity model

A manufacturing method and aeroelastic model technology, which can be applied to heat exchanger types, special data processing applications, instruments, etc., can solve the problem of incongruity between the simulation of axial stiffness and bending-torsional stiffness scaling ratio, and achieve the goal of improving analysis accuracy. Effect

Inactive Publication Date: 2012-07-25
赵林 +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a space continuous shell structure aeroelastic model of an equivalent space discrete grid production method, which solves the problem of incongruity between the simulation of the axial stiffness and the bending torsional stiffness scale ratio of the traditional space continuous shell model

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  • Method for making equivalent space discrete-grid vibration elasticity model
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  • Method for making equivalent space discrete-grid vibration elasticity model

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0037] The wind tunnel test is based on the similarity principle of motion, making the test object (aircraft, large building, structure, etc.) into a model or directly placing it in the wind tunnel duct, and making the air duct generate an artificially controllable air flow through the driving device , to simulate the behavior of the test object under the action of airflow, and then obtain relevant parameters to determine the stability and safety of the test object.

[0038] The theoretical basis of the wind tunnel experiment is the flow similarity principle. Due to the limitations of wind tunnel size, structure, materials, models, and experimental gases, it is impossible for wind tunnel experiments to be completely similar to real conditions. The usual wind tunnel experiment is only a partially similar simulation experiment. Therefore, befor...

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Abstract

The invention belongs to the field of structural vibration engineering, particularly relates to a method for making an equivalent vibration elasticity model capable of improving a space continuous shell structure. The method comprises the following steps of: carrying out fine modeling on the tower tube shell unit of a cooling tower, simplifying a cooling tower unit model, calculating and modeling a spatial beam unit, simplifying a meridianal beam grid unit, adopting components with equal length and thickness, adopting a welding manner to connect a plurality of vertical-horizontal connecting points in the splitting process, introducing a rigidity commutation factor, establishing a rigidity loss relationship by actually measuring dynamic characteristic values through a preprocessing model during the model designing process, adopting a corresponding rigidity correction method in the model designing process, using a cooling tower shell unit to model, taking a dynamic characteristic result as basis, extracting former 6-8 orders of modals as simulation targets, carrying out iterative calculation and adjusting variable values so as to obtain a better simulation effect. According to the method disclosed by the invention, the problem that two types of rigidities of the conventional physical test model are inconsistent is avoided, the analysis precision of a space continuous shell structure test is largely improved, and a strong practicability is obtained.

Description

[technical field] [0001] The invention belongs to the field of structural vibration engineering, and in particular relates to a method for making an equivalent vibration elastic model of a space-continuous shell structure. [Background technique] [0002] The equivalent vibration-elastic model of space continuous shell structure using the method of making equivalent space discrete grid can more realistically simulate the dynamic characteristics of continuous shell shell structure in structural vibration tests, and can directly measure the structure in strong wind and earthquake etc. Displacement and acceleration responses under load excitation. The design of this model effectively solves the problem of inconsistency in the simulation of the axial stiffness and bending torsional stiffness of the traditional continuum model, and on the basis of appropriately changing the roughness of the aerodynamic shape, it can approximate the simulation of the tower under the high Reynolds n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28C1/00G06F17/50
Inventor 赵林葛耀君
Owner 赵林
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