scholarly journals Analisis Tingkat Pelayanan Terminal Bandar Laksamana Indragiri

2021 ◽  
Vol 18 (2) ◽  
pp. 141-155
Author(s):  
Bayu Budi Irawan ◽  
Momon Momon
Keyword(s):  
Performance Analysis ◽  
Load Factor

Terminal Bandara Laksamana Indragiri (BLI) merupakan salah satu terminal Tipe B yang berada di Kabupaten Indragiri Hilir. Terminal ini mulai beroperasi pada tahun 2012 namun saat ini belum optimal dalam memberikan pelayanan. Tujuan penelitian ini adalah untuk menilai tingkat kelayakan terminal BLI sehingga mampu memberikan pelayanan yang lebih baik. Hasil penelitian dapat digunakan sebagai pertimbangan dalam peningkatan kinerja terminal. Metode yang digunakan untuk melakukan penilaian adalah analisis Importance Performance Analysis (IPA), SWOT, Load Factor, kelayakan terminal dan kesesuaian Standar Pelayanan Minimal (SPM). Berdasarkan hasil IPA didapatkan rata-rata tingkat kesesuaian pelayanan terminal BLI adalah 58,61%. Analisis SWOT menunjukkan kondisi terminal berada di kuadran 1 dan nilai Load factor 60-100%. Analisis kelayakan terminal menunjukkan bahwa aksesibilitas menjadi permasalahan utama. Untuk Analisis SPM didapatkan hasil bahwa kondisi fasilitas pelayanan memerlukan perbaikan ringan dan perawatan secara berkala.

Analysis of the Stiffness of Hirth Couplings in Rod-Fastened Rotors Based on Experimental Modal Parameter Identification

2014 ◽  
Author(s):  
Xin Liu ◽  
Qi Yuan ◽  
Yang Liu ◽  
Jin Gao
Keyword(s):  
Performance Analysis ◽  
Parameter Identification ◽  
Gas Turbine ◽  
Dynamic Performance ◽  
Load Factor ◽  
Stiffness Coefficient ◽  
Modal Parameter ◽  
Modal Parameter Identification ◽  
Tightening Force ◽  
Dynamic Performance Analysis

Hirth couplings are widely used to transport torque between discs in turbine machinery for the advantages of precise centering, reliable positioning and excellent structural stability. However, the stiffness of the rotor segment with Hirth couplings is less than that of the integrated structure because it is weaken in the discontinuous structure. For the rotor segment with Hirth couplings, there are two types of contact status depending on the relationship between the separate stress and the compression stress. The first type is that the whole zone of Hirth couplings is in contact, where all of the Hirth couplings make contribution to the stiffness of the rotor segment. The second type of contact status is that some zones of the Hirth couplings are separated, where the equivalent stiffness of the rotor segment is only determined by the zones which are in contact. Obtaining accurate stiffness of Hirth couplings is of great significance in rotor dynamic performance analysis. In this study, the flexural stiffness of Hirth couplings of a gas turbine was calculated by three dimensional (3D) nonlinear contact Finite Element Method (FEM), and based on which the natural frequencies of a rod-fastened rotor were investigated. The stiffness modifying method which modifies the elasticity modulus of the material in the connection segment was used to conduct modal analysis in order to evaluate the effect of the stiffness weakening of the Hirth couplings. One experimental rotor with Hirth couplings and a central tie rod was designed to verify the theoretical and numerical analysis results. According to the results, the stiffness coefficient is constant when the load factor γ is less than 1.0, which means the stiffness of the Hirth couplings segment is almost constant when the pre-tightening force is large enough to keep the whole zone of the Hirth couplings in contact. The stiffness coefficient constant is about 0.32 (specific for the investigated model). And the stiffness coefficient drops dramatically when the load factor γ exceeds 1.0, which indicates that the stiffness of the Hirth couplings segment decreases dramatically since the pre-tightening force is insufficient and the Hirth couplings are separated. The Hirth couplings segment stiffness obtained by experimental modal parameter identification turned out to be consistent with the calculated results by FEM. The modified stiffness of the Hirth couplings segment were applied on the dynamic performance analysis of a real gas turbine rotor and the accuracy of calculating results was improved.

scholarly journals ANALISIS KINERJA PELAYANAN ANGKUTAN UMUM ANTAR PROVINSI MENGGUNAKAN BUS ( Studi Kasus: Trayek Lhokseumawe - Medan)

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Gustina Fitri
Keyword(s):  
Performance Analysis ◽  
Load Factor

Angkutan umum mempunyai peranan yang sangat penting bagi pergerakan arus lalu lintas dan merupakan salah satu unsur yang turut menentukan perkembangan sosial dan ekonomi suatu wilayah perkotaan. Fenomena munculnya berbagai moda transportasi menyebabkan masyarakat dapat memilih alternatif pemilihan pelayanan yang paling efektif dan efisien untuk melakukan perjalanan antar provinsi dengan angkutan bus, juga dibarengi oleh pertumbuhan jumlah penduduk dan aktifitas yang mereka lakukan. Penelitian ini dilakukan di terminal Cunda Lhokseumawe selama 3 hari, pagi jam 08:30-10:00 WIB dan malam jam 22:00-24:00 WIB dengan jumlah sampel 80 sampel. Penelitian ini bertujuan untuk mengetahui kinerja pelayanan angkutan bus antar pronvinsi ditinjau dari jumlah tempat duduk, waktu antara ( headway ) , permindahan moda, faktor muat ( load factor ) , waktu perjalanan, biaya perjalanan, keamanan dan kenyamanan berdasarkan Standarisasi Direktorat Jenderal Perhubungan Darat dan persepsi penumpang. Untuk mengetahui persepsi para pengguna jasa angkutan bus antar provinsi dianalisis dengan metode Importance-Performance Analysis ( IPA ) agar diketahui kinerja pelayanan angkutan bus dari sudut pandang penumpang. Berdasarkan hasil penelitian dengan standar operasi yang dikeluarkan oleh Direktorat Jenderal Perhubungan Darat dari variabel jumlah tempat duduk dengan hasil sedang, waktu antara ( headway ) dengan hasil baik, perpindahan moda dengan hasil baik, faktor muat ( load factor ) dengan hasil sedang, waktu perjalanan dengan hasil baik, biaya perj alan dengan hasil baik. Sedangkan berdasarkan penilaian masyarakat dari variabel jumlah tempat duduk dengan hasil baik, waktu antara ( headway ) dengan hasil buruk, faktor muat ( load factor ) dengan hasil baik, waktu perjalanan dengan hasil sedang, biaya perjalan dengan hasil baik, kinerja operasional dengan hasil baik.Kata-kata kunci: bus, headway, kinerja pelayanan, load factor, Importance Performance Analysis ( IPA )

scholarly journals PERFORMANCE ANALYSIS AND MODELING OF PASSENGER PUBLIC TRANSPORT SERVICES IN SALATIGA CITY

ASTONJADRO ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Mudjiastuti Handajani ◽  
Ferry Firmawan ◽  
Harmini Harmini
Keyword(s):  
Performance Analysis ◽  
Public Transport ◽  
Public Transportation ◽  
Waiting Times ◽  
Load Factor ◽  
Transportation Services ◽  
Transport Services ◽  
Research Activities ◽  
Directorate General ◽  
Public Transport Services

<p>The performance condition of public transportation services in Salatiga City does have an average rating of still good, but it still has classic problems such as there is no passenger stop, public transportation takes a long time to catch up on deposits, and passengers do not know the fare per kilometer that must be paid. These conditions encourage research activities in the form of an analysis of the performance of public transport passengers in Salatiga City (Case Study of the Tamansari – Blotongan Route). The long-term goal of this research is that the resulting analysis can contribute to stakeholders in Salatiga City, especially in terms of (public transport) towards smart transportation. The specific target to be achieved from the research is the analysis and modeling of the performance of passenger public transport services that will be carried out in Salatiga City, in the form of field surveys and secondary data collection, namely: number of vehicles, number of passengers and data in the form of public transport routes: routes, schedules, speeds and Primary forms are: boarding alighting (up and down passengers) and headway (distance between two public transport vehicles). The analytical method used is the analysis and modeling of the performance of passenger public transportation services in accordance with Government Regulation No. 10 of 2012 Directorate General of Land Transportation concerning Minimum Service Standards for Road-Based Mass Transportation. The results showed that the physical condition of the passenger fleet of Salatiga City on the Tamansari - Blotongan PP route was classified as suitable for use. There are a total of 90 fleets that are sufficient for the needs of Salatiga City public transport passengers who want to travel by means of transportation. The results of the performance analysis based on various indicators show that the performance quality of public transportation services in Salatiga City has met the standards set by the Directorate General of Land Transportation. It can be seen from the results of the load factor analysis with a value of 0.72, the value is included in category A, namely &gt; 0.8. For the level of satisfaction and level of performance, most of the indicators have met the satisfaction of public transport passengers in Salatiga City, so it is sufficient to maintain it. However, there are indicators of waiting times for public transportation that need to be improved.</p>

scholarly journals Kinerja Bus Trans Padang Koridor IV dan Karateristik Penumpangnya

2021 ◽  
Vol 18 (2) ◽  
pp. 175-185
Author(s):  
Salma Wahid Zaidir ◽  
Purnawan Purnawan
Keyword(s):  
Performance Analysis ◽  
Waiting Time ◽  
Director General ◽  
Load Factor ◽  
Final Destination ◽  
Bus Stop ◽  
Urban Village ◽  
Destination Area ◽  
Work Trip ◽  
Age Range

In order to counterbalance movement of the city is by building mass transportation. However, the number of users who interested in using Trans Padang Corridor IV is relatively low. Analysis of the performance and passengers characteristics of the Trans Padang Corridor IV Bus is useful for improving performance based on the characteristics of the passengers. This study used a quantitative method in the form of observations, interviews, and also questionnaires which were described descriptively. Performance analysis was based on the decision of the Director General of Land Transportation No.SK.687/AJ.206/DRJD/2002. Based on the performance analysis (load factor, headway, waiting time, amount of buses, travel time, speed, capacity and cycle time) only waiting time was in accordance with the reference. For the passengers characteristics dominated by women, age range 36-45 years old, live in Lubuk Buaya urban village, private employee occupation, salary range <Rp. 500,000, do not have personal vehicle, the distance from the house to the bus stop is about 500m-1 km, work trip destination, reach the departure bus stop and final destination on foot, the time took from the departure to the destination is <5 minutes, the location of the departure stop is at the Lubuk Buaya bus stop, the destination area is Lubuk Buaya urban village, and the reasons for choosing the bus are because of the safety and the convenience of the bus.

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