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Impact simulation method for Kelwet reticulated shell with roof panel

A simulation method and roof panel technology, applied in the field of structural impact, can solve the problems of difficult establishment of Kaiwitt spherical reticulated shell, low efficiency, and long reticulated shell impact simulation cycle, so as to improve the efficiency of numerical simulation operation and simplify the reticulated shell model , Reduce the effect of simulation operation cycle

Pending Publication Date: 2021-09-07
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an impact simulation method for a Kaiwitt reticulated shell with a roof panel, which can quickly establish a Kaiwitt spherical reticulated shell with a roof panel, and accurately and quickly simulate the impact dynamic response of the Kaiwitt spherical reticulated shell , to solve the problems of difficulty in building Kaiwitt spherical reticulated shells with roof panels, long reticulated shell impact simulation cycle and low efficiency

Method used

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  • Impact simulation method for Kelwet reticulated shell with roof panel
  • Impact simulation method for Kelwet reticulated shell with roof panel
  • Impact simulation method for Kelwet reticulated shell with roof panel

Examples

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Embodiment 1

[0043] refer to figure 1 , is a flow chart of the impact simulation method for a Kaiwitt spherical reticulated shell with a roof panel adopted in the present invention, and is implemented according to the following steps:

[0044] Step 1: Establish the main rod, purlin, column, rivet and roof panel model of Kaiwitt spherical reticulated shell;

[0045] Step 2: Use the "Import" function in the finite element analysis software ABAQUS to import the main rod, purlin, column, rivet and roof panel of the K8 reticulated shell established in step 1 into ABAQUS to generate each part of the finite element reticulated shell model, and at the same time establish Cylindrical impactor;

[0046] Step 3: Place the components in step 2 from the bottom to the top according to the order of the reticulated shell main rod, column, purlin, rivet, roof panel, and impact object, and complete the finite element model assembly;

[0047] Step 4: Connect the parts of the reticulated shell, set the thre...

Embodiment 2

[0057] According to the impact simulation method of a Kaiwitt reticulated shell with a roof panel described in Example 1, in the step 1, the model of the main rod, purlin, column, rivet, and roof panel of the Kaiwitt spherical reticulated shell is established, and the specific process yes,

[0058] 1.1) Determine the basic parameters of the Kaiwit spherical reticulated shell, and determine the span and height of the purlins and roof panels according to the geometric relationship between the main rod of the reticulated shell and the purlins and roof panels, and use the large-span spatial structure software MST to establish the main rods, purlins, roof panel model;

[0059] 1.2) Import the reticulated shell main rod-purlin, purlin-roof panel into AUTO-CAD, connect the reticulated shell main rod and purlin to generate the main rod, and connect the purlin and roof panel to generate rivets;

[0060] 1.3) Import the roof panel into Rhino software to generate the roof panel skin.

Embodiment 3

[0062] According to the impact simulation method of Kaiwit reticulated shell with roof panel described in Embodiment 1 or 2, in the step 1.1), the determination of the relationship between the main rod of the reticulated shell, the purlin, and the geometric dimension of the roof panel is as follows:

[0063] Purlins or roof spans L 1 , Yataka f 1 , determined by the following formula:

[0064]

[0065] In the formula, L is the span of the main pole of the reticulated shell, f is the vertical height of the main pole of the reticulated shell, a is the height of the column and rivets.

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Abstract

The invention relates to an impact simulation method for a Kelwet spherical reticulated shell with a roof panel. The method aims to solve the problems that a Kelwet spherical reticulated shell with a roof panel is difficult to establish, the impact simulation period of the reticulated shell is long, and the efficiency is low. The method comprises the following steps: establishing a model of each component of the Khelvett reticulated shell; importing the model into ABAQUS, generating parts of a finite element model, and establishing an impact object model; assembling each part; connecting all parts of the model, and setting boundary conditions; applying load to the roof panel, arranging a gravity field, and setting impact object speed; setting an analysis step, creating a contact relation between an impact object and the reticulated shell, and selecting a contact algorithm; endowing the latticed shell with a material, and setting the mass of an impact substance; selecting the unit type of each part, deploying a grid division strategy, and recording the number of grid types at each position; and judging whether the impact area grid is excessively distorted and whether the operation period is normal. The invention is used for impact simulation of the Kawet reticulated shell.

Description

technical field [0001] The invention belongs to the field of structural impact, and relates to an impact simulation method for a Kaiwit grid shell with a roof panel. Background technique [0002] With the increasing complexity of human society, the risk of structures being subjected to extreme accidental loads such as bomb explosions and flying object impacts during the service phase is also increasing. Because of its beautiful shape and good mechanical performance, the long-span space structure is often a landmark building in a region. The Kaiwitt spherical reticulated shell is one of the most representative forms because it can flexibly cover a large space and Uniform stress is widely used, and this kind of building is densely populated at the same time, and it is more likely to become the target of terrorist attacks. Once damaged or even collapsed under extreme accidental events, it will cause immeasurable and serious consequences. In this context, it is of great politic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/23
CPCG06F30/13G06F30/23
Inventor 林莉唐鹏霄魏盛杰刘宪聪张耀月徐天立袁鑫
Owner HARBIN UNIV OF SCI & TECH
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