Design analysis and design history

1981 ◽  
Vol 3 (1) ◽  
pp. 23-29
Author(s):  
Pauline Madge
Keyword(s):  
Design Analysis ◽  
Design History ◽  
Analysis And Design

Shock Analysis and Design Method of Vibration Isolating System in the Time Domain

2005 ◽  
Author(s):  
Yinglong Zhao ◽  
Lin He ◽  
Zhiqiang Lv ◽  
Yu Wang
Keyword(s):  
Dynamic Analysis ◽  
Time Domain ◽  
Design Analysis ◽  
Analysis Method ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Protection Measures ◽  
Analysis And Design ◽  
Shock Protection ◽  
The Time Domain

Choosing the equipment with good shock-resistant performance and taking shock protection measures while designing the onboard settings, the safety of onboard settings can be assured when warships, especially submarine subjected to non-contact underwater explosion, that is, these means can be used to limit the rattlespace (i.e., the maximum displacement of the equipment relative to the base) and the peak acceleration experienced by the equipment. Using shock-resistant equipments is one of shock protection means. The shock-resistant performance of the shock-resistant equipments should be verified in the design phase of the equipments. The shock design analysis methods used before and now includes shock design number method (static g-method), dynamic analysis in the time domain and dynamic design analysis method (DDAM). The FEA (Finite Element Analysis) software, for example, MSC.NASTRAN®, can be used for shock design analysis of the shock-resistant equipments. MSC.NASTRAN are used for shock design analysis of floating raft vibration isolating equipment with dynamic analysis method in the time domain in this paper, and the analysis results are in agreement with the test results. The shock design analysis method used in this paper can be used to analyze the shock-resistant performance of onboard shock-resistant equipments.

The Effects of Forced-Feed Lubrication on Performance Characteristics of Full Finite Journal Bearings

1969 ◽  
Vol 91 (3) ◽  
pp. 544-550 ◽  
Author(s):  
H. Servaes
Keyword(s):  
Reynolds Equation ◽  
Numerical Solutions ◽  
Theoretical Data ◽  
Journal Bearings ◽  
Design Analysis ◽  
Performance Characteristics ◽  
Experimental Measurements ◽  
Analysis And Design ◽  
Supply Pressure ◽  
Side Flow

The purpose of this paper is to facilitate the analysis and design of pressure fed journal bearings. Numerical solutions of Reynolds’ equation are obtained for full finite journal bearings for the widely used case of L/D = 1. It is found that the performance characteristics of the bearing, mainly the side flow, depend not only on the Sommerfeld number but also on the groove dimensions and on the oil supply pressure. The calculated characteristics are compared with experimental measurements. Correlation is good, leading to the conclusion that the theoretical data are effective for design analysis of pressure fed journal bearings.

A Dynamic System Model for Estimating Surface-Induced Frame Loads During Off-Road Cycling

1994 ◽  
Vol 116 (3) ◽  
pp. 816-822 ◽  
Author(s):  
H. Wilczynski ◽  
M. L. Hull
Keyword(s):  
Dynamic System ◽  
Design Analysis ◽  
System Model ◽  
Dynamic Loads ◽  
Maximum Magnitude ◽  
Analysis And Design ◽  
Contact Points ◽  
Surface Irregularities ◽  
Bicycle Rider ◽  
Dynamic System Model

To facilitate the design analysis of off-road bicycle frames, this paper reports a dynamic model of the bicycle/rider system which estimates frame loads for bicycles traveling over rough surfaces. To develop this model, the frame loads at rider contact points were first measured experimentally as a rider coasted over a test track with randomly spaced surface irregularities in both seated and standing positions. Following this measurement, a dynamic system model was developed with the aid of the commercial software package, Dynamic Analysis and Design Software (DADS). The development process consisted of two stages. The first stage involved developing component models (e.g., seat) which could reproduce the essentials of the measured data. The second stage involved identification of parameter values for those parameters shown to most profoundly affect simulated load results. Following parameter identification, simulated loads were statistically tested and were not significantly different from experimental loads. Also, maximum magnitude dynamic loads were compared to corresponding static load magnitudes and were larger for eight of the ten load components measured. With the importance of dynamic loads demonstrated and the model verified, it can now be used advantageously to generate a loading database for design analysis purposes.

Main Principles on Analysis and Design of Buried Ballasted Pipelines on Marshes

1996 ◽  
Author(s):  
Leonid A. Dimov ◽  
Valeriy N. Vershinin
Keyword(s):  
Design Analysis ◽  
Soil Deformation ◽  
Gas Pipelines ◽  
Analysis And Design ◽  
General Stability ◽  
State Of Stress ◽  
Lateral Displacements ◽  
Stress And Deformation ◽  
Oil Gas

State of stress and deformation of buried oil-gas pipelines under, operation must meet appointed requirements on strength, deformability, general stability, etc. Fulfilment of those requirements while designing main and field pipelines in conditions of marshes and marshy soils is very problematical. The cause lies both in weak knowledge of peat reaction to longitidual and lateral displacements of the pipe and in impossibility on account of that to analize the pipe state of stress and deformation taking into consideration the joint pipe-soil deformation. Wide research into pipe-peat interaction has been carried out at the Institute of Construction (Republic of Komi, Russia). In the paper there are enumerated main principles on design, analysis and engineering of buried ballasted pipelines on marshes, which have been worked at the Institute. The practical value of the work results for improvement of pipelines reliability under operation is emphasized in the paper, too.

A Dynamic System Model for Estimating Surface-Induced Frame Loads During Off-Road Cycling

1993 ◽  
Author(s):  
Herve Wilczynski ◽  
Maury L. Hull
Keyword(s):  
Dynamic System ◽  
Rational Design ◽  
Design Analysis ◽  
The Body ◽  
System Model ◽  
Dynamic Loads ◽  
Maximum Magnitude ◽  
Analysis And Design ◽  
Contact Points ◽  
Dynamic System Model

Abstract To facilitate the rational design analysis of off-road bicycle frames, this paper reports a dynamic model of the bicycle/rider system which estimates frame loads for bicycles traveling over rough surfaces. To develop this model, the frame loads at rider contact points were first measured experimentally as a rider coasted over a test track with randomly spaced surface irregularities in both seated and standing positions. Following this measurement, a dynamic system model was developed with the aid of the commercial software package, Dynamic Analysis and Design Software (DADS). The development process consisted of two stages. The first stage involved developing component models (e.g., seat) which could reproduce the essentials of the measured data. The second stage involved identification of parameter values for those parameters shown to most profoundly affect simulated load results. These parameters were all associated with the dynamics of the body thus emphasizing the importance of reflecting the dynamic system nature of the body in the model. Following parameter identification, simulated loads were statistically tested and were not significantly different from experimental loads. Also, maximum magnitude dynamic loads were compared to corresponding static load magnitudes and were larger for eight of the ten load components measured. With the importance of dynamic loads demonstrated and the model verified, it can now be used advantageously to generate a loading database for design analysis purposes.

scholarly journals Perancangan Sistem Informasi Penjualan pada Apotek

2013 ◽  
Vol 4 (1) ◽  
pp. 55
Author(s):  
Angelina Permatasari
Keyword(s):  
Information System ◽  
Information Needs ◽  
Design Method ◽  
Object Oriented ◽  
Design Analysis ◽  
Analysis And Design ◽  
System A ◽  
Study Results ◽  
Application Design ◽  
Object Oriented Analysis

The purpose of this study is to analyze the problems on the sales system of a pharmacy, to identify the information needs and to design a sales information system that addresses the information needs. The methodologies used are analysis and design. Analysis are conducted to identify the needs of information through observation, interviews, and surveys of the old system. While the design method used is Object Oriented Analysis and Design (OOAD). This study results in an application design of sales information system for the pharmacy to handle the manual sales system. A computerized sales information system is able to solve problems that occur in the old system and procedures at the pharmacy. 

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