Frame structure design method based on H1 gradient method using shape, size and topology optimization

2020 ◽  
Vol 2020.30 (0) ◽  
pp. 1107
Author(s):  
Shoki TANI ◽  
Masatoshi SHIMODA ◽  
Naoaki MIYASHITA
Keyword(s):  
Topology Optimization ◽  
Gradient Method ◽  
Design Method ◽  
Structure Design ◽  
Frame Structure ◽  
And Topology

Based on the Grey Relation Analysis of Ecological Composite Wall Seismic Performance Research

2013 ◽  
Vol 368-370 ◽  
pp. 1043-1047
Author(s):  
Yin Zhang ◽  
You Han ◽  
Shuai Liang
Keyword(s):  
Seismic Performance ◽  
Evaluation System ◽  
Design Method ◽  
Structure Design ◽  
Grey System Theory ◽  
Frame Structure ◽  
Wall Structure ◽  
Width Ratio ◽  
Grey System ◽  
Composite Wall

Ecological composite wall as ecological composite wall structure of the main stress components, the seismic performance is ecological composite wall structure seismic performance evaluation system of the main content. Based on the grey system theory, the grey correlation analysis to the key parameters (the mouth of the cave, frame structure, height to width ratio) change ecological composite wall test results are analyzed, the key parameters on the ecological composite wall the influence law of seismic performance, for choosing wall structure design method to provide basis.

A Practical Design Method for Energy Dissipation Structure

2012 ◽  
Vol 204-208 ◽  
pp. 1150-1153
Author(s):  
Min Chen ◽  
Guo Jing He ◽  
Chang Liu
Keyword(s):  
Energy Dissipation ◽  
Design Method ◽  
Damping Ratio ◽  
Time History ◽  
Structure Design ◽  
Frame Structure ◽  
Seismic Region ◽  
History Analysis ◽  
Dissipation Structure ◽  
Supplemental Damping

Energy dissipation structure is favored by designers because the earthquake energy can be dissipated by the dampers, which can avoid or reduce the damage caused by earthquake. However, the energy dissipation structure design is complex and the most domestic designers can not master it easily. In this paper, a simple and practicable design method for viscous damper dissipation structure by using the PKPM design software is proposed based on a 7-storey frame structure in highly seismic region. Firstly, lower half or one degree for the design intensity to design out an uncontrolled structure. Secondly, determine the supplemental damping ratio required for the fortification intensity via modal analysis method of PKPM software, and identify the numbers of the required dampers as well as their corresponding installation positions in line with the methods in the seismic code of China. Finally, the ETABS program is adopted to conduct the time-history analysis of the designed dissipation structure, showing that the proposed method in this paper can produce a satisfied result.

Application of a Ground Beam-Joint Topology Optimization Method for Multi-Piece Frame Structure Design

2008 ◽  
Vol 130 (8) ◽  
Author(s):  
Myung-Jin Kim ◽  
Gang-Won Jang ◽  
Yoon Young Kim
Keyword(s):  
Topology Optimization ◽  
Optimization Technique ◽  
Joint Stiffness ◽  
Optimization Method ◽  
Structure Design ◽  
Frame Structure ◽  
Optimal Layout ◽  
Design Variables ◽  
Discrete Values ◽  
Topology Optimization Method

When a multipiece frame structure is designed, not only its topological layout but also assembly locations should be determined. This paper presents a compliance-minimizing topology optimization technique to determine an optimal layout configuration and to suggest candidate assembly locations. The technique employs a ground beam-joint model and places candidate assembly joints where the values of joint stiffness are relatively small. The zero-length joint elements have varying stiffness controlled by real-valued design variables. Because joint stiffness values at the converged state can be utilized to select candidate assembly locations along with their strengths, the technique is extremely useful in multipiece frame structure design. Because structural properties of ground beams can have only discrete values or remain unchanged for optimization process, no poststructural modification is required in an actual manufacturing step.

The Optimization Design and Analysis of Motorcycle Frame Structure

2011 ◽  
Vol 141 ◽  
pp. 569-573 ◽  
Author(s):  
Jiang Wang ◽  
Ji Zhou ◽  
Bao Bao Li ◽  
Xiao Ling Li ◽  
Shi Yong Song
Keyword(s):  
Topology Optimization ◽  
Engineering Design ◽  
Optimization Design ◽  
Optimization Theory ◽  
Frame Structure ◽  
Fem Model ◽  
Fatigue Stress ◽  
And Topology ◽  
Motorcycle Frame ◽  
The Cost

The optimization theory of the motorcycle frame structure was described. The FEM model of the frame structure was established by Hyperworks software, the stress and fatigue stress of the frame structure was analyzed. The frame parts were optimized through the size and topology optimization according to the stress and the displacement. The result showed that the stress of the frame structure changed little comparing with that before, which was in the permitted range of engineering design. The cost of the motorcycle frame structure was reduced, and the frame weight was lightened about 6.5%.

Manufacturability-Oriented Ground Beam-Joint Topology Optimization for Multi-Piece Frame Structure Design

2007 ◽  
Author(s):  
Myung-Jin Kim ◽  
Gang-Won Jang ◽  
Yoon Young Kim
Keyword(s):  
Topology Optimization ◽  
Structural Modification ◽  
Joint Stiffness ◽  
Structure Design ◽  
Design Tool ◽  
Frame Structure ◽  
Structural Performance ◽  
Beam Model ◽  
Optimal Layout ◽  
Design Variables

Topology optimization is a useful design tool, but it often yields layouts difficult to manufacture without considerable post structural modification. As a result, its structural performance can be significantly deteriorated. To minimize the undesirable postprocessing, we aim to develop a manufacturability-oriented compliance-minimizing topology optimization using a ground beam model incorporating additional zero-length elastic joint elements. In the present formulation, design variables control the stiffness of zero-length elastic joints, not the stiffness of beams. Because joint stiffness values at the converged state can be utilized to select candidate assembly locations, the technique is extremely useful to design multi-piece frame structures. An optimal layout is also extracted based on the stiffness values. Because structural properties of ground beams can take only on discretely available values or remain unchanged for optimization process, no post structural modification is required in an actual manufacturing step.

Topology Optimization of QY70G Truck Crane Turntable Structure

2014 ◽  
Vol 532 ◽  
pp. 466-469 ◽  
Author(s):  
Ye Fei ◽  
Xing Kun Wang ◽  
Wen Min Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Design Method ◽  
Structure Design ◽  
Structural Topology ◽  
Main Bearing ◽  
Element Analysis ◽  
Finite Element Software ◽  
Before And After

Turntable is the main bearing component of truck crane, its structural-load-carrying capacity influences the operational capability directly. This paper adopts the HyperWorks software to make topology optimization for the turntable structure of QY70G truck crane, and carry out the finite element analysis and comparison for the models before and after optimization, which provides an effective method to improve the turntable structure of truck crane. Turntable is one of the important components of truck crane，it bears hoist boom、lifting、luffing mechanism and bob-weight and so on, it is the transfer center of truck crane when it works, the structure will directly affect the lifting performance of the machine. But, the rotary table structure design is affected by the vehicle shape size and installation and space layout. The traditional design method is based the experience of analogy to check by finite element software, it is difficult to get the design scheme which meets the requirements given above and own better strength and stiffness, it also have the disadvantages of long design cycle and large workload. This article is based on the finite element method and structural topology optimal idea, by means of HyperWorks-OptiStruct, makes finite element analysis for the turntable structure of certain QY70G truck crane, and carries on the structural topology in the condition of setted installation location and space, in order to obtain the ideal design plan.

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