A direct-inverse transonic wing design-analysis method with viscous interactions

1985 ◽  
Author(s):  
L. CARLSON ◽  
R. WEED
Keyword(s):  
Design Analysis ◽  
Analysis Method ◽  
Wing Design

scholarly journals Feasibility of a Transient Dynamic Design Analysis Method

1994 ◽  
Vol 1 (3) ◽  
pp. 241-251
Author(s):  
Patrick F. Cunniff ◽  
George J. O’Hara
Keyword(s):  
Degrees Of Freedom ◽  
Time History ◽  
Design Analysis ◽  
Analysis Method ◽  
Dynamic Design ◽  
Fixed Base ◽  
Design Values ◽  
Rigid Mass ◽  
Comparison Of The Results ◽  
Three Degrees Of Freedom

This article addresses the degree of success that may be achieved by using simple equipment–vehicle models that produce time history responses whose equipment fixed base modal maximum response values are equivalent to those found in the U.S. Navy's dynamic design analysis method. The criteria of success is measured by a comparison of the results with typical interim shock design values. The equipment models reported are limited to two- degree and three degrees of freedom systems; the model of the vehicle to which the equipment is attached consists solely of a rigid mass and an elastic spring; and the shock excitation is produced by an ideal impulse that is applied to the vehicle mass.

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.

Shock Analysis of a Stern Ramp Using Dynamic Design Analysis Method

2017 ◽  
Author(s):  
Jonas W. Ringsberg ◽  
Erland Johnson ◽  
Meng Zhang ◽  
Yunbo Yu
Keyword(s):  
Response Spectrum ◽  
Underwater Explosion ◽  
Structural Response ◽  
Vertical Direction ◽  
Design Analysis ◽  
Shock Load ◽  
Analysis Method ◽  
Dynamic Design ◽  
Loading Direction ◽  
Design Changes

Shock load caused by underwater explosion in naval battles can lead to malfunction of the equipment on-board naval vessels. It makes the ships vulnerable and they can lose the ability to accomplish their missions. This study presents a shock analysis, using the dynamic design analysis method (DDAM), of a naval ship stern ramp subjected to a non-contact underwater explosion. The objective is to evaluate the performance of the ramp subjected to a shock load, identify areas for structural improvements and recommend design changes. The DDAM in the commercial software ANSYS is used in the evaluation of the ramp. The structural response to the shock load is estimated by combined modal and response spectrum analyses. The shock load is applied in three directions (vertical, fore and aft, athwart ships) and the results show that the vertical direction is the most severe loading direction and critical to the functionality of the ramp. A parametric study is presented which shows which parameters that influence the most the structural response. The results from this study are used to suggest improvements of the ramp structure to make it more resistant to shock loads.

scholarly journals PENGEMBANGAN RUANG KOTA SAMARINDA DENGAN MENERAPKAN METODE TEKNIK ANALISA URBAN

2020 ◽  
Vol 2 (2) ◽  
pp. 114-126
Author(s):  
Edith Abram Rochdi
Keyword(s):  
Urban Design ◽  
Urban Space ◽  
Spatial Planning ◽  
Geographical Location ◽  
Design Analysis ◽  
Urban Spatial Structure ◽  
Analysis Method ◽  
Analysis Technique ◽  
Urban Analysis ◽  
The City

ABSTRAK Apabila dilihat secara keseluruhan, maka pada sebuah kota yang ada merupakan suatu  leburan atau penyatuan dari bangunan dan penduduk. Pada awalnya bentuk kota adalah netral yang kemudian berubah sampai saat ini sesuai dengan kondisi masing-masing sebuah kota. Terbentuknya kota tergantung lokasi dan letak geografinya yang sangat mempengaruhi karakteristik kotanya. Hal ini tentunya juga budaya tertentu memberikan peran serta dalam pembentukan sebuah kota.  Pengembangan kota perlu diperhatikan penataannya agar terarah tatanan ruang kotanya dan mempunya karakteristik tersendiri. Demikian juga dengan kota Samarinda yang sekarang ini makin berkembang dengan pesat perlu dijaga penataan ruang kotanya agar tidak kumuh dan berciri khas. Sebelum dilakukan penataan ruang kota pada kawasan tertentu yang dipentingkan terutama pada koridor sungai Mahakam, maka bentuk kota ini dapat dipelajari dan dikaji secara tinjauan lapangan dengan mengamati kondisi eksisting. Disini perlu dibantu beberapa metode dan teknik analisa urban. Metode dan teknik analisa ini merupakan analisa perancangan kota atau urban design analysis untuk mendapatkan kesimpulan karakteristik bentuk morfologi kota yang bisa direkomendasikan nantinya untuk penataan ruang kotanya.Kata kunci: Ruang Kota, Samarinda, Teknik Analisa Urban. ABSTRACT When viewed as a whole, then in an existing city is a fusion or a union of buildings and residents. At first the form of the city was neutral which then changed to the present according to the conditions of each city. The formation of cities depends on their location and geographical location which greatly influences the characteristics of the city. This of course also certain cultures give a role in the formation of a city. The development of the city needs to be considered in its arrangement so that the urban spatial structure is directed and has its own characteristics. Likewise, the city of Samarinda, which is growing rapidly, needs to be maintained so that the spatial planning of the city so that it is not dirty and has a distinctive characteristic. Before urban spatial planning is carried out in certain areas of particular importance in the Mahakam river corridor, the shape of the city can be studied and studied in a field review by observing existing conditions. Here need to be assisted by several methods and techniques of urban analysis. This analysis method and technique is an urban design analysis to get a conclusion about the characteristics of the city morphology that can be recommended later for spatial planning of the city.Keywords: Urban space, Samarinda, Urban analysis technique.

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