scholarly journals Dynamic Similitude Design Method of the Distorted Model on Variable Thickness Cantilever Plates

2016 ◽  
Vol 6 (8) ◽  
pp. 228 ◽  
Author(s):  
Zhong Luo ◽  
Yunpeng Zhu ◽  
Haopeng Liu ◽  
Deyou Wang
Keyword(s):  
Variable Thickness ◽  
Design Method ◽  
Dynamic Similitude ◽  
Distorted Model

scholarly journals The Dynamic Similitude Design Method of Thin Walled Structures and Experimental Validation

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Zhong Luo ◽  
You Wang ◽  
Yunpeng Zhu ◽  
Deyou Wang
Keyword(s):  
Governing Equation ◽  
Scaling Laws ◽  
Design Method ◽  
Scaling Law ◽  
Dynamic Scaling ◽  
Annular Plates ◽  
Thin Walled Structures ◽  
Dynamic Similitude ◽  
Thin Walled ◽  
Complete Scaling

For the applicability of dynamic similitude models of thin walled structures, such as engine blades, turbine discs, and cylindrical shells, the dynamic similitude design of typical thin walled structures is investigated. The governing equation of typical thin walled structures is firstly unified, which guides to establishing dynamic scaling laws of typical thin walled structures. Based on the governing equation, geometrically complete scaling law of the typical thin walled structure is derived. In order to determine accurate distorted scaling laws of typical thin walled structures, three principles are proposed and theoretically proved by combining the sensitivity analysis and governing equation. Taking the thin walled annular plate as an example, geometrically complete and distorted scaling laws can be obtained based on the principles of determining dynamic scaling laws. Furthermore, the previous five orders’ accurate distorted scaling laws of thin walled annular plates are presented and numerically validated. Finally, the effectiveness of the similitude design method is validated by experimental annular plates.

Study on model design and dynamic similitude relations of vibro-acoustic experiment for elastic cavity

2018 ◽  
Vol 32 (12n13) ◽  
pp. 1840047
Author(s):  
Ao Shi ◽  
Bo Lu ◽  
Dangguo Yang ◽  
Xiansheng Wang ◽  
Junqiang Wu ◽  
...  
Keyword(s):  
High Speed ◽  
Acoustic Noise ◽  
Effective Means ◽  
Structural Vibration ◽  
Structural Dynamic ◽  
Simulation Research ◽  
Structural Dynamic Characteristics ◽  
Scale Down ◽  
Dynamic Similitude ◽  
Distorted Model

Coupling between aero-acoustic noise and structural vibration under high-speed open cavity flow-induced oscillation may bring about severe random vibration of the structure, and even cause structure to fatigue destruction, which threatens the flight safety. Carrying out the research on vibro-acoustic experiments of scaled down model is an effective means to clarify the effects of high-intensity noise of cavity on structural vibration. Therefore, in allusion to the vibro-acoustic experiments of cavity in wind tunnel, taking typical elastic cavity as the research object, dimensional analysis and finite element method were adopted to establish the similitude relations of structural inherent characteristics and dynamics for distorted model, and verifying the proposed similitude relations by means of experiments and numerical simulation. Research shows that, according to the analysis of scale-down model, the established similitude relations can accurately simulate the structural dynamic characteristics of actual model, which provides theoretic guidance for structural design and vibro-acoustic experiments of scaled down elastic cavity model.

Application of a work-centered design method to support counterspace operations

2005 ◽  
Author(s):  
Michael Szczepkowski ◽  
Kelly Neville ◽  
Ed Popp
Keyword(s):  
Design Method

PERANCANGAN SISTEM PEMBELAJARAN MOBILE (M-LEARNING) BERBASIS ANDROID PADA MATERI BANGUN DATAR DAN BANGUN RUANG

2018 ◽  
Vol 1 (2) ◽  
pp. 1-17
Author(s):  
Tedi Budiman
Keyword(s):  
Mobile Learning ◽  
Design Method ◽  
Case Study Method ◽  
Application Development ◽  
Software Application ◽  
Rapid Application Development ◽  
User Design ◽  
Design Software ◽  
Application Programs

One example of the growing information technology today is mobile learning, mobile learning which refers to mobile technology as a learning medium. Mobile learning is learning that is unique for each student to access learning materials anywhere, anytime. Mobile learning is suitable as a model of learning for the students to make it easier to get an understanding of a given subject, such as math is pretty complicated and always using formulas.The design method that I use is the case study method, namely, learning, searching and collecting data related to the study. While the development of engineering design software application programs that will be used by the author is the method of Rapid Application Development (RAD), which consists of 4 stages: Requirements Planning Phase, User Design Phase, Construction Phase and Phase Cotuver.

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