scholarly journals RESEARCH ON FORCE AND MODAL ANALYSIS OF THE CANTILEVER ROOF MODEL OF A STADIUM

2021 ◽  
Vol 30 (3) ◽  
Author(s):  
Qian Zhang
Keyword(s):  
Process Design ◽  
Selection Process ◽  
Structural Characteristics ◽  
Structure Design ◽  
Structure Model ◽  
Finite Element Software ◽  
Roof Structure ◽  
Static Performance ◽  
Strength And Stiffness ◽  
Structural Engineers

The large-span roof structure is favored by architects and structural engineers all over the world for its novel architectural shape and reasonable structural characteristics. It has been widely used in large public buildings such as sports buildings, memorial buildings and cultural buildings. Based on the structure design of the fourth national college students’ competition winning entries for the model, this paper introduces the stadium upper cantilever roof structure model selection, process design, interface, etc. Using the finite element software ANSYS to analyze the model structure under different load conditions of the static performance, we acquire its natural frequency. The results show that the model meets both the strength and stiffness requirement.

Application of Seismic Isolation Designing Method Based on China Building Seismic Code

2012 ◽  
Vol 166-169 ◽  
pp. 2088-2091
Author(s):  
Xin Mei Dong ◽  
Yan Ming Wang ◽  
Pei Pei Guo ◽  
Ming Wei Li
Keyword(s):  
Design Process ◽  
Process Design ◽  
Seismic Isolation ◽  
Structure Design ◽  
Seismic Code ◽  
Practical Engineering ◽  
Structural Engineers ◽  
Designing Method

Based on China building seismic code (GB5011-2010), an overview about base-isolated designing method is presented in this paper. The composition of base-isolated structure, design process, design content, application in practical engineering are involved .The purpose of this paper is to make structural engineers have an overall understand about base-isolated structure design, and promote the further application of this kind of structure in China.

scholarly journals Structure Design and Bearing Capacity Analysis for Crawler Chassis of Rice Combine Harvester

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Zhong Tang ◽  
Hui Ren ◽  
Xiyao Li ◽  
Xin Liu ◽  
Biao Zhang
Keyword(s):  
Bearing Capacity ◽  
Structural Characteristics ◽  
Good Method ◽  
Structure Design ◽  
Control Panel ◽  
Sitting Posture ◽  
Finite Element Software ◽  
Chinese Adult ◽  
Driving Speed ◽  
Combine Harvester

Due to the current unstable travel performance and poor driving maneuverability of rice combine harvester crawler chassis with high load in the rice field, the driver’s standard sitting posture model was developed by analyzing the handling of the crawler chassis driving control panel. Based on this model, the joystick length and cab manipulation space layout were designed. The Finite Element Software was used to develop the loading and restraining model of the chassis frame, and then the structural characteristics and bearing capacity of the crawler chassis were analyzed. The high-bearing running stability and the rationality of operating force of the joystick of rice combine harvester crawler chassis designed in this paper through experiments were verified by experiments. The results showed that when the crawler chassis of rice combine harvester bears a load of 3.5 t, the driving speed is relatively stable in the three speed ranges of 1 m/s, 1.5 m/s, and 2 m/s, and the maximum variance of driving speed variation is 5.022 × 10−4. The actual average operating force of each operating lever on the crawler chassis ranges from 30.36 to 42.71 N, and the operating force of each operating lever is suitable for 95% of Chinese adult male operators. The research results provide a good method and reference for the future development of the crawler chassis structure of rice combine harvester.

Structure Design and Antiknock Performance Analysis of New Mine Refuge Chamber

2014 ◽  
Vol 945-949 ◽  
pp. 1227-1231
Author(s):  
Xiao Yan Gong ◽  
Xin Gao ◽  
Jun Guo ◽  
Jun Xu ◽  
Chao Ming Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Performance Analysis ◽  
Coal Mine ◽  
Structure Design ◽  
Structure Model ◽  
Safety Problem ◽  
Impact Performance ◽  
Finite Element Software ◽  
Potential Safety

In order to solve the potential safety problem due to the explosion of coal mine caused the severe deformation of the front door not being opened normally and the emergency escape hatch was designed unreasonably, three types of structure model with emergency escape hatch being set in transition compartment as entrance and different locations of life supporting compartment as exit, which can avoid the potential safety problem above mentioned. Numerical simulation of antiknock impact performance of the three refuge cabins were calculated and analyzed by using the finite element software of LS-DYNA.The results indicated that the antiknock performance of structures could reach specifications, which could provide a new idea for the development of mine refuge chamber cabin.

IMPLEMENTASI PENENTUAN ARSITEKTUR MASJID MODERN DI ACEH MENGGUNAKAN PEMODELAN SISTEM CERDAS

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Soraya Masthura Hasan ◽  
T Iqbal Faridiansyah
Keyword(s):  
Fuzzy Inference System ◽  
Architectural Design ◽  
Fuzzy Inference ◽  
Intelligent System ◽  
Selection Process ◽  
System Modeling ◽  
Inference System ◽  
Normal Limits ◽  
Roof Structure ◽  
Selection Of

Mosque architectural design is based on Islamic culture as an approach to objects and products from the Islamic community by looking at their suitability and values and basic principles of Islam that explore more creative and innovative ideas. The purpose of this system is to help the team and the community in seeing the best mosque in the top order so that the system can be used as a reference for the team and the community. The variables used in the selection of modern mosques include facilities and infrastructure, building structure, roof structure, mosque area, level of security and facilities. The system model used is a fuzzy promethee model that is used for the modern mosque selection process. Fuzzy inference assessment is used to determine the value of each variable so that the value remains at normal limits. Fuzzy values will then be included in promethee assessment aspects. The highest promethee ranking results will be made a priority for the best mosque ranking. This fuzzy inference system and promethee system can help the management team and the community in determining the selection of modern mosques in aceh in accordance with modern mosque architecture. Intelligent System Modeling System In Determining Modern Mosque Architecture in the City of Aceh, this building will be web based so that all elements of society can see the best mosque in Aceh by being assessed by all elements of modern mosque architecture.Keywords: Fuzzy inference system, Promethe, Option of  Masjid

scholarly journals Fabrication of Polycaprolactone/Nano Hydroxyapatite (PCL/nHA) 3D Scaffold with Enhanced In Vitro Cell Response via Design for Additive Manufacturing (DfAM)

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1394
Author(s):  
Yong Sang Cho ◽  
So-Jung Gwak ◽  
Young-Sam Cho
Keyword(s):  
Mechanical Properties ◽  
Cell Response ◽  
Structural Characteristics ◽  
Structure Design ◽  
Compressive Modulus ◽  
Control Group ◽  
Design For Additive Manufacturing ◽  
3D Scaffold ◽  
3D Printed

In this study, we investigated the dual-pore kagome-structure design of a 3D-printed scaffold with enhanced in vitro cell response and compared the mechanical properties with 3D-printed scaffolds with conventional or offset patterns. The compressive modulus of the 3D-printed scaffold with the proposed design was found to resemble that of the 3D-printed scaffold with a conventional pattern at similar pore sizes despite higher porosity. Furthermore, the compressive modulus of the proposed scaffold surpassed that of the 3D-printed scaffold with conventional and offset patterns at similar porosities owing to the structural characteristics of the kagome structure. Regarding the in vitro cell response, cell adhesion, cell growth, and ALP concentration of the proposed scaffold for 14 days was superior to those of the control group scaffolds. Consequently, we found that the mechanical properties and in vitro cell response of the 3D-printed scaffold could be improved by kagome and dual-pore structures through DfAM. Moreover, we revealed that the dual-pore structure is effective for the in vitro cell response compared to the structures possessing conventional and offset patterns.

Design and kinematics of a novel double-ring truss deployable antenna mechanism

2021 ◽  
pp. 1-14
Author(s):  
Wen-ao Cao ◽  
Sheng Xi ◽  
Huafeng Ding ◽  
Ziming Chen
Keyword(s):  
Topological Structure ◽  
Screw Theory ◽  
Structural Characteristics ◽  
Kinematic Model ◽  
Structure Design ◽  
Structural Symmetry ◽  
Double Ring ◽  
Joint Axis ◽  
Structure Decomposition ◽  
Topological Scheme

Abstract This paper aims to present the topological structure design and kinematic analysis of a novel double-ring truss deployable satellite antenna mechanism. First, a new topological scheme and a new rectangular prism deployable linkage unit are proposed for constructing the kind of antenna mechanisms. Second, the degree-of-freedom (DOF) of the deployable unit and the antenna mechanism are analyzed based on structure decomposition and screw theory. Third, the kinematic model of the double-ring truss deployable antenna mechanism is established based on its structural characteristics. Finally, a typical numerical example is used to illustrate the effectiveness of the designed mechanism and the established kinematic model. The new double-ring truss deployable antenna mechanism consists of the units with the better structural symmetry, and has simpler joint axis layouts, comparing with the same type of most existing mechanisms.

scholarly journals Automatic Mode-Matching Method for MEMS Disk Resonator Gyroscopes Based on Virtual Coriolis Force

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 210
Author(s):  
Zhihu Ruan ◽  
Xukai Ding ◽  
Zhengcheng Qin ◽  
Jia Jia ◽  
Hongsheng Li
Keyword(s):  
Coriolis Force ◽  
Electrostatic Force ◽  
Structural Characteristics ◽  
Structure Design ◽  
Driving Voltage ◽  
Mode Matching ◽  
Matching Method ◽  
Disk Resonator ◽  
Mode Matching Method ◽  
Automatic Mode

An automatic mode-matching method for MEMS (Micro-electromechanical Systems) disk resonator gyroscopes (DRGs) based on virtual Coriolis force is presented in this paper. For this mode-matching method, the additional tuning electrodes are not required to be designed, which simplifies the structure design. By using the quadratic relationship between the driving voltage and the electrostatic force, the virtual Coriolis force is obtained by applying an AC voltage whose frequency is half of the driving mode resonant frequency to the sense electrode. The phase difference between the virtual Coriolis force and the sense output signal is used for mode-matching. The structural characteristics and electrode distribution of the DRG are briefly introduced. Moreover, the mode-matching theories of the DRG are studied in detail. The scheme of the mode-matching control system is proposed. Simultaneously, the feasibility and effectiveness of the mode-matching method are verified by system simulation. The experimental results show that under the control of mode-matching at room temperature, the bias instability is reduced from 30.7575 ° /h to 2.8331 ° /h, and the Angle Random Walk (ARW) decreases from 1.0208 ° / h to 0.0524 ° / h . Compared with the mode mismatch condition, the ARW is improved by 19.48 times.

The Structure Design and Analysis of Predigest Laser Combine Bind and Extend Bind Flat Roof

2011 ◽  
Vol 291-294 ◽  
pp. 2466-2470
Author(s):  
Xu Dong Han ◽  
Bing Wang ◽  
Kui Shi ◽  
Chang Shun Liu ◽  
Heng Kun Wang ◽  
...  
Keyword(s):  
High Precision ◽  
Structure Design ◽  
Small Space ◽  
Roof System ◽  
Roof Structure ◽  
Flat Roof

This paper put forward a kind of predigest laser combine bind and extend bind flat roof structure, which is founded as fission flat roof, and can be built in an little room 1280mm×990mm×815mm. This flat roof space location can be adjusted. This kind of seat can ensure the system complete laser combine and close as high precision. In this paper we designed the laser combine and close whole structure and install design. At last we did some finite statics analysis to some important parts. This design can ensure every laser fire directional adjust mete lower ±30′, and the flat roof quality is 770kg. The transition benchmark flat roof system most meet and emergency is 0.005mm at the premise of bear the weight of turn flat laden. It can be seen that this structure can satisfy the request of many lasers small space laser extend bind and adjust. This kind can be extended to other light combine bind and extend bind structure design.

Structure Optimization of Ship Unloader for Weight Reduction by FEA

2012 ◽  
Vol 443-444 ◽  
pp. 713-718
Author(s):  
Sui Ran Yu ◽  
Quan Fei Zhang
Keyword(s):  
Design Method ◽  
Work Conditions ◽  
Structure Design ◽  
Element Analysis ◽  
Traditional Structure ◽  
The Finite Element Analysis ◽  
Strength And Stiffness ◽  
Stress And Deformation ◽  
Fea Analysis

This paper introduces a optimize design method of ship unloader. The traditional structure design method is totally by experience and manual calculation, while this method is using the Finite Element Analysis (FEA) method to optimize the structure of ship unloader. Therefore this method may keep the stress and deformation of the structure under permission with less use of materials. First we use the FEA analysis software ANSYS to analyze the static strength and stiffness of grab ship unloader, and get its stress and deformation under different work conditions. Then we evaluate the results and modify the structures to improve the performances of the structure under the complex working conditions. Case study shows this method is effective and efficient in practical use.

Simplified Analysis of Second-Order Effect on Staggered Truss Structure

2012 ◽  
Vol 446-449 ◽  
pp. 857-862
Author(s):  
Qi Shi Zhou ◽  
Xu Hong Zhou ◽  
Li Ming Yang
Keyword(s):  
Structural Characteristics ◽  
Order Effect ◽  
Second Order ◽  
Truss Structure ◽  
Order Effects ◽  
Good Precision ◽  
Finite Element Software ◽  
Load Carrying ◽  
Second Order Effects ◽  
Lateral Displacements

Based on the structural characteristics that the distribution of mass and stiffness is symmetrical in staggered truss structure, the load-carrying performance of staggered truss structure is equivalent to a pressure-bend combinational strut in this paper. By analyzing the relationship among curvatures , bending moments and shear forces of the pressure-bend combinational strut, the balance differential equations of the pressure-bend combinational strut is erected. Based on Runge-Kutta method, the lateral iteration equation derived by considering the influence of the second-order effects is derived. This paper analyzes the lateral displacements of floors of the staggered truss structure examples considering second-order effects or not, and gives a comparative analysis with the existing finite element software Ansys. The results show that the calculation method of second-order effects proposed in this paper has a good precision.

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