scholarly journals THE FEASIBILITY ANALYSIS OF BOEING 737-500 OPERATION AT NORTH ACEH MALIKUSSALEH AIRPORT

Vortex ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 17
Author(s):  
Aldrian Nasaifal R
Keyword(s):  
Load Capacity ◽  
Air Transportation ◽  
Optimal Transportation ◽  
Feasibility Analysis ◽  
Doing Business ◽  
Calculation Results ◽  
Airport Runway ◽  
Short Time

The large number of Acehnese people who are outside Aceh with various needs, such as doing business, working or studying. The optimal transportation to use to the destination quickly in a short time, namely air transportation. North Aceh Malikussaleh Airport is the second busiest airport in Aceh Province.The analysis in this study used PKP-PK analysis, analysis of the feasibility of Boeing 737-500 aircraft using the FPPM method, and analysis of the load capacity of Boeing 737-500 aircraft.From the calculation results, the Boeing 737-500 aircraft is not suitable to be flown at the Malikussaleh Airport in North Aceh due to the limitations of the PKP-PK category level and the strength of the Malikussleh Airport runway. Therefore, North Aceh Malikussaleh Airport must be upgraded

Lastverteilung in Planetenrollengewindetrieben/Description of the load distribution in planetary roller screws

2020 ◽  
Vol 110 (05) ◽  
pp. 322-327
Author(s):  
Christian Brecher ◽  
Thomas Frenken ◽  
Gabriel Axelrad ◽  
Stephan Neus
Keyword(s):  
Load Distribution ◽  
Load Capacity ◽  
Calculation Model ◽  
Axial Stiffness ◽  
Contact Points ◽  
Calculation Results ◽  
Roller Screw ◽  
The Individual ◽  
Individual Contact ◽  
High Load Capacity

Planetenrollengewindetriebe finden aufgrund ihrer hohen Tragfähigkeit Anwendung in Bereichen, in denen Kugelgewindetriebe an ihre Lastgrenzen stoßen. Um ein Berechnungsmodell für Planentenrollengewindetriebe zu entwickeln, wurden Berechnungsmethoden zur Beschreibung der Lastverteilung innerhalb des Planetenrollengewindetriebs entwickelt. Mit diesen lassen sich die in den einzelnen Kontaktpunkten wirkenden Kräfte sowie die Verlagerungen des Gewindetriebs bestimmen. Die Berechnungsergebnisse werden unter anderem für die Berechnung der statischen axialen Steifigkeit und der Ermüdungslebensdauer benötigt.   Due to their high load capacity, planetary roller screws are used in areas where ball screws reach their load limits. To develop a calculation model for planetary roller screws, calculation methods to describe the load distribution within the planetary roller screw were developed in this step. With these methods, the forces acting in the individual contact points as well as the displacements of the screw drive can be determined. The calculation results are required, among other things, for the calculation of static axial stiffness and fatigue life.

scholarly journals A Feasibility Analysis of Controlling a Hybrid Power System over Short Time Intervals

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5682
Author(s):  
Tianyao Zhang ◽  
Diyi Chen ◽  
Jing Liu ◽  
Beibei Xu ◽  
Venkateshkumar M
Keyword(s):  
Solar Radiation ◽  
Hybrid Systems ◽  
Feasibility Analysis ◽  
Energy Sources ◽  
Systematic Change ◽  
Short Term ◽  
Time Intervals ◽  
Hybrid Power ◽  
The Stability ◽  
Short Time

Literature about the importance of renewable energy resources, including wind and solar energy, is becoming increasingly important; however, these energy sources are unstable and volatile in nature, and are usually integrated with conventional energy sources, such as hydropower, forming hybrid power generation systems that maintain a stable grid. Short-term changes in wind speed or solar radiation intensity have a great impact on the stability of hybrid systems, and have been reported in the literature. However, reliable models to manage such systems are lacking, and previous studies have regarded the hour scale as the minimum baseline for systematic change. In this article, hybrid power systems are proposed that are controlled on very short time intervals. The results of a feasibility analysis of the proposed model indicate the viability of complementary hybrid systems in controlling and maintaining the stability, which are subjected to short durations of fluctuations in wind or solar radiation. The simulation results indicate that the influence of the shutdown of the wind turbine, with the regulation effect of the hydro power, is 3–5 times greater than that of the short-term wind turbulence fluctuation. When the hydro turbine is adopted to adjust the short-term fluctuation of solar radiation, the effect on the system was suppressed to 0.02–0.2 times of the former.

The Investigation of Stability Analysis of Tube and Coupler Scaffold

2012 ◽  
Vol 594-597 ◽  
pp. 730-733 ◽  
Author(s):  
Hua Zhi Li ◽  
Zhe Liu ◽  
Jia Yong Miao
Keyword(s):  
Ultimate Load ◽  
Load Capacity ◽  
Empirical Method ◽  
Analysis Method ◽  
Ultimate Load Capacity ◽  
Calculation Results ◽  
Impacting Factors ◽  
The Stability ◽  
High Load Capacity ◽  
Semi Empirical

The tube and coupled scaffold is widely used in the construction of building, bridge, sports stadium etc, due to the advantage of easily assembling, high load capacity and good overall stiffness. However as a very important temporary structure in the construction, the semi-empirical method has been used for the calculation of ultimate load capacity (ULC), whether the calculation results are acceptable is not given too much attention. To ascertain the safety of using process, the FEM code-Midas is used to investigate and compare the stability and ultimate load analysis method of scaffold, and the impacting factors, such as the span, step distance, height, and width of scaffold, are discussed, the varying process and trend is described in this paper.

Design of an axially concave pad profile for a large turbine tilting-pad bearing

2016 ◽  
Vol 231 (4) ◽  
pp. 479-488 ◽  
Author(s):  
Sebastian Kukla ◽  
Nico Buchhorn ◽  
Beate Bender
Keyword(s):  
Heat Transfer ◽  
Film Thickness ◽  
Load Capacity ◽  
Measurement Data ◽  
Tangential Direction ◽  
Measured Temperature ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Tilting Pad ◽  
Calculation Results

To improve operational safety and/or achieve a higher load capacity of turbine tilting-pad bearings, an axially concave pad profile is presented. The thermal and mechanical stress of the loaded pads of a test bearing in load between pivot configuration has been analysed. Both film thickness and pressure distribution have been measured at a very high resolution. A fluid film calculation program in combination with a finite-volume-based structural mechanics program is used to simulate the deformation of a single pad under high circumferential speeds. In this context, the axial and tangential heat transfer coefficients of the pad surface, which act as boundary conditions for the calculation of the 3D temperature distribution, are determined using an optimization process. Herein, the match of predicted and measured pad temperatures is the goal. It can be shown that there must be a huge difference in heat transfer in axial and tangential direction in order to match the large measured temperature gradient in circumferential direction. Based on the measured deformed profile the program code is used to derive a concave pad profile, which will result in an axially non-arched sliding surface under the expected thermal load. Therefore, an iterative simulation procedure is used. By decreasing the axial arching of the pad and thus the large film thickness at the axial ends using an improved profile designed for a specific operation point, the minimum film thickness and maximum pad temperature can be influenced beneficially. The comparison of measurement data and calculation results shows very good agreement regarding the pad deformations. The results indicate that by axially concave profiling of the loaded pads of a large tilting-pad bearing for a specific operation point, the static characteristics in the form of temperature, film thickness and load capacity can be improved.

Perencanaan Pengembangan Runway dan Taxiway Bandar Udara Juwata – Tarakan

WARTA ARDHIA ◽  
2017 ◽  
Vol 42 (4) ◽  
pp. 203
Author(s):  
Endang Dwi
Keyword(s):  
Air Transportation ◽  
Development Planning ◽  
Capital City ◽  
Main Task ◽  
North Borneo ◽  
Class 1 ◽  
Calculation Results ◽  
Provincial Capital ◽  
Touchdown Point ◽  
Near Future

Di Kalimantan Utara saat ini transportasi melalui udara memegang peranan penting sehingga diperlukan mobilitas angkutan udara yang tinggi, dimana ibukota Provinsi adalah Kota Tarakan yang didalamnya terdapat Bandar Udara Juwata yang telah ditetapkan sebagai bandar udara kelas 1 khusus. Disamping menjadi bandar udara internasional, Bandar Udara Juwata juga berfungsi sebagai pusat penyebaran dan merupakan bandar udara perbatasan yang mempunyai tugas pokok melaksanakan penyelenggara pelayanan kepada masyarakat pengguna jasa penerbangan dan penyedia penunjang angkutan udara. Bandar Udara Juwata mempunyai program pengembangan runway/landasan pacu dan taxiway/landas hubung dalam merencanakan pesawat yang dibutuhkan yaitu Airbus A-330 dimasa yang akan datang. Melalui metode peramalan pergerakan pesawat serta menggunakan panduan dari SKEP/77/VI/2005 dalam menghitung perencanaan perpanjangan landasan pacu serta landas hubung, disimpulkan bahwa sampai dengan tahun 2026 terdapat 24.049 pergerakan pesawat, sedangkan hasil perhitungan pengembangan landas pacu yang dibutuhkan untuk pesawat rencana A-330 adalah 3.383 meter dan jarak touchdown ke lokasi taxiway yang dibutuhkan adalah 1.394 meter. Untuk pengembangan tersebut akan dilaksanakan melalui tahapan sesuai program. [Runway Development Planning and Taxiways Airport Juwata- Tarakan] Air transportation in North Borneo region nowadays plays an important role where the mobility by air transportation is getting higher and the provincial capital city, Tarakan, has the Juwata Airport which is classified as the Class 1 Distinguish Airport. Besides it is designated as international airport, the Juwata Airport also act as the distribution center and country border airport in which its main task is serving the air transportation users and operators. The Juwata Airport is planning the development of runway and taxiway so that it can serve the Airbus A-330 aircraft in the near future. Using the guideline in SKEP/77/VI/2005 and applying the method of aircraft movement forecast to calculate the planned runway and taxiway extension, it is found that until 2026 there will be 24.049 aircraft movement while the calculation results give the runway length that is needed so that the airport can serve the targeted aircraft, Airbus A-330, is 3.383 meter and the distance between touchdown point to taxiway is 1.394 meter. The development process will be done in phases according to the appropriate program.

scholarly journals Modeling of Drug Delivery by A Pump Driven Micro-Needle Array System

2016 ◽  
Vol 10 (1) ◽  
pp. 19-33 ◽  
Author(s):  
Kai Chen ◽  
Min Pan ◽  
Zhi-Gang Feng
Keyword(s):  
Mathematical Model ◽  
Material Properties ◽  
Time Varying ◽  
Diffusion Boundary ◽  
System Parameters ◽  
Micro Pump ◽  
Calculation Results ◽  
Spherical Expansion ◽  
Short Time ◽  
And Diffusion

Background: Micro-needles were proposed as one of the alternatives to deliver drugs painlessly passing through stratum corneum in recent years. In this work, a mathematical model is presented to characterize the in fusion flow of a hollow micro-needle array driven by a micro-pump. Methods: By assuming the injection of each micro-needle undergoes a spherical expansion and diffusion, the model is able to calculate the time-varying expansion radius, and the diffusion boundary, provided that the material properties and the micro-needle system parameters are known. Results and Conclusion: The calculation results show that the expansion caused by the infusion of micro-needles stops and the flow rate drops to zero in a short time. However, the diffusion boundary is much bigger than the expansion and the infusion continues if the surrounding material is absorptive. The experimental results of jet infusion through a single needle in silicon rubber and polyacrylamide gel agree with the calculation results qualitatively.

Finite Element Analysis of Anti-Reflective Crack for Geosynthetic in Asphalt Overlay of Airport Runway

2012 ◽  
Vol 503-504 ◽  
pp. 847-850
Author(s):  
Zhi Gang Luo ◽  
Yan Liu ◽  
Sui Yuan Wang ◽  
Bo Diao
Keyword(s):  
Finite Element ◽  
Surface Deformation ◽  
Element Model ◽  
General Purpose ◽  
Main Role ◽  
Element Analysis ◽  
Finite Element Software ◽  
Asphalt Overlay ◽  
Calculation Results ◽  
Airport Runway

To make clear the work mechanism of geosynthetic in asphalt overlay under the aircraft wheel loads, one 3D dimension finite element model was constructed on the basis of the general purpose finite element software ABAQUS. Numerical calculation results with different geosynthetic modulus are presented in this paper, and show that it is very limited for geosynthetic to reduce bottom stress and surface deformation of asphalt overlay, and asphalt overlay bottom is in compression state, thus, geosynthetic can not exert it’s film tension function, namely the main role of geosynthetic is not to bear loads together with asphalt overlay, but to improve stress state of asphalt overlay for preventing cracks appearance or delaying cracks expansion.

scholarly journals IMPLEMENTASI ETIKA BISNIS ISLAM DALAM PELAYANAN JASA

2021 ◽  
Vol 15 (2) ◽  
pp. 341-358
Author(s):  
Zainuddin Zainuddin ◽  
Ummal Khoiriyah
Keyword(s):  
Business Ethics ◽  
Descriptive Analysis ◽  
Customer Complaints ◽  
Goods And Services ◽  
Doing Business ◽  
Excellent Service ◽  
Islamic Business Ethics ◽  
External Part ◽  
Correct Application ◽  
Short Time

Every businessman must apply ethics properly. With the correct application of ethics, the business activities carried out will run correspondingly to the applicable religious rules. Ethics that must be considered in doing business include ethics with fellow entrepreneurs, employees, customers and the community. This research is a qualitative research that uses descriptive analysis, which describes all the data that the researcher collects, both from the results of observations, interviews and documentation during research at CV. HAZHA Banyuwangi about the implementation of Islamic business ethics in services. Based on the results of the study indicate that Islamic business ethics in CV. HAZHA has been applied in serving consumers. The ethics applied are correspondingly to what is taught in Islam. This can be seen from the existence of excellent service, the quality of the products marketed, always keeping promises in accordance with the agreement, determining prices evenly, the existence of activities in the form of worship and so on. Consumers get satisfactory goods and services, they are always polite and friendly in serving and listening to customer complaints. Supporting factors that affect the progress of CV. HAZHA is all parts, both internal and external parts. Internal parts are the cooperation of employees who support each other, quality goods and excellent service while the external part is customer loyalty. The inhibiting factors experienced by CV. HAZHA are a very short time gap between ordering, processing and delivery, because report card cover and certificate folders are only needed in certain months

scholarly journals Studi Proyeksi Kebutuhan Fasilitas Sisi Darat Dan Pengembangan Kota Bandar Udara Ahmad Yani Di Kota Semarang

2017 ◽  
Vol 12 (4) ◽  
pp. 418
Author(s):  
Pindyandito Surya Wikrana Putra
Keyword(s):  
Quantitative Methods ◽  
Air Transportation ◽  
Flow Data ◽  
City Growth ◽  
The North ◽  
Projection Analysis ◽  
Airport Runway ◽  
The City ◽  
Rate Development ◽  
Terminal Area

Ahmad Yani Airport that located in Semarang City is the gateway and transit point for the cities around Semarang. These things made number of passengers and goods are increasing in the Ahmad Yani Airport. The existence Obstacle of Limitation Surfaces on Ahmad Yani Airport did not obstruct the city and the building development therefore it can be built around the airport. The passenger and goods growth rate development Ahmad Yani Airport are not matched by the infrastructure and non-flight facilities growth. In the result of it, there are deficiencies of landside facilities and airport support facilities as a central air transportation. OLS existence is still regarded as a obstruct city growth. This study uses quantitative methods by projection analysis of passengers and flight flow data in previous years. The results are used to find the range of the airport number of passengers and airport facilities volume requirements in the future. The results showed that the rush hour number of passengers at Ahmad Yani Airport is 2864 people and the sum total of passengers per year 57,727,482 in 2035. Terminal area needs a minimum of 12,626 m2 and 38,556 m2 of parking area. The Ahmad Yani Airport required the most supporting room facilities, such as; concession airport room, parking area, pedestrian path, airport hotel, and followed by other facilities. Superimpose and normative analysis showed that the potential placement for the new airport facilities is on the north Ahmad Yani Airport runway.

scholarly journals Dynamical Properties of the New Ternary Fission in Collisions of 197Au+197Au at 15 MeV/Nucleon

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Xian Li ◽  
Chengqian Wang ◽  
Yaohui Xu
Keyword(s):  
Angular Distribution ◽  
Impact Parameter ◽  
Time Interval ◽  
Ternary Fission ◽  
Short Time Interval ◽  
Quantum Molecular Dynamics ◽  
Calculation Results ◽  
Dynamical Properties ◽  
Short Time ◽  
The Impact

The dynamical properties of the new ternary fission in heavy 197Au+197Au at 15 MeV/nucleon have been investigated by using the improved quantum molecular dynamics model. The dependencies of the production probability, lifetime, the time interval, and angular distribution on the impact parameter are carefully studied. The calculation results show that the characteristics of these are very different between the small and the large impact parameter. Comparing the theoretical results with the experimental data, one can obtain that the fast ternary breakup likely occurs at the impact parameter region b = 7 ‐ 9  fm. The nonisotropic of angular distribution and the short time interval among two fissions indicates that the fast ternary fission is a nonequilibrium and violent process.

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