scholarly journals Occupied Volume Integrity Testing: Elastic Test Results and Analyses

Author(s):  
Michael Carolan ◽  
Michelle Muhlanger ◽  
Benjamin Perlman ◽  
David Tyrell

The Office of Research and Development of the Federal Railroad Administration (FRA) and the Volpe Center have been conducting research into developing an alternative method of demonstrating the occupied volume integrity (OVI) of passenger rail equipment through a combination of testing and analysis. This research has been performed as a part of FRA Office of Research and Development’s Railroad Safety Research and Development program, which provides technical data to support safety rulemaking and enforcement programs of the FRA Office of Railroad Safety. Previous works have been published on a series of full-scale, quasi-static tests intended to examine the load path through the occupant volume of conventional passenger cars retrofitted with crash energy management (CEM) systems. This paper reports on the most recent testing and analysis results. Before performing any tests of proposed alternative loading techniques, an elastic test of the passenger car under study was conducted. The elastic test served both to aid in validating the finite element (FE) model and to verify the suitability of the test car to further loading. In January, 2011, an 800,000 pound conventional buff strength test was performed on Budd Pioneer 244. This test featured arrays of vertical, lateral, and longitudinal displacement transducers to better distinguish between the deformation modes and rigid body motions of the passenger car. Pre-test car repairs included straightening a dent in one side sill and installing patches over cracks found in the side sills. Additionally, lateral restraints were added to the test frame due to concerns in previous tests associated with lateral shift in the frame. As a part of this testing program, a future test of a passenger car is planned to examine an alternative load path through the occupied volume. In the case of Pioneer 244, this load path places load on the floor and roof energy absorber support structures. Loading the occupant volume in this manner more closely simulates the loading the car would experience during a collision. FE analysis was used in conjunction with full-scale testing in this research effort. An FE model of the Pioneer car was constructed and the 800-kip test was analyzed. The 800-kip test results were then compared to the analysis results and the model was adjusted post-test so that satisfactory agreement was reached between the test and the model. In particular, the boundary conditions at the loading and reaction locations required careful attention to appropriately simulate the support conditions in the test. Because the 800-kip load was applied at the line of draft, this test results in significant bending as well as axial load on the car. To ensure that both the axial and bending behaviors are captured in the model, the key results that were compared between test and model are the longitudinal force-displacement behavior and the vertical deflections at various points along the car. The post-test model exhibited good agreement with the compared test results. The validated model will be used to examine the behavior of the occupant volume when loaded along the alternative load path.

2021 ◽  
Vol 2 (3) ◽  
pp. 354-364
Author(s):  
Raddina Aprilia Putri ◽  
Endang Susantini ◽  
Titik Taufikurohmah

The type of research applied in this research is Research and Development. The development model used is Dick and Carrey. The purpose of this research and development is to design an Atlas and apply it to train the students' scientific reasoning abilities. Atlas is a teaching materials developed and applied to high school / vocational / MA level students. The sample chosen for the implementation of the Atlas of teaching materials was grade X of VOCATIONAL Health Yannas Husada Bangkalan students. The application of plants as natural indicators of acid-base tests is the material presented in the developed Atlas. Plants selected as indicators are tested first to be presented in the Atlas. Atlas is a teaching material that can convey information related to the use of natural indicators of the acid-base test to train the students' scientific reasoning skills. The four indicators of scientific reasoning that are trained are Theoretical Reasoning, Proportional Reasoning, Probabilistic Reasoning, and Correlational Reasoning. The data shows the students' scientific reasoning ability on the post-test results, as many as 20% of students are on the high criteria, 60% are moderate criteria, and 20% are still on the low criteria from the post-test results. The post-test result data is quite increased when compared to the pretet results, which 100% of students are in the low criteria.


Author(s):  
Michael Carolan ◽  
Benjamin Perlman ◽  
David Tyrell

This research program was sponsored by the Federal Railroad Administration (FRA) Office of Research and Development in support of the advancement of improved safety standards for passenger rail vehicles. FRA and the Volpe National Transportation Systems Center (Volpe Center) have conducted a research program to develop alternative methods for demonstrating occupied volume integrity (OVI) of passenger rail cars using a combination of testing and analysis. Previous publications have addressed the planning and progress of a series of tests intended to examine the collision load path through the occupant volume of passenger cars equipped with crash energy management (CEM) systems. This program has included an elastic 800-kip buff strength test, two quasi-static tests that loaded a passenger car to its ultimate (crippling) capacity, and corresponding finite element (FE) analyses of each test. This paper discusses the two crippling tests and the companion FE analyses. One alternative method for evaluating OVI moves the applied loads from the line of draft to the collision load path. This alternative methodology also permits a combination of testing and analysis to be used to demonstrate the car’s OVI, in contrast to the conventional methodology (as prescribed in existing FRA regulations) which only permits testing. The alternative methodology was adopted as the recommendations developed by the Railroad Safety Advisory Committee’s (RSAC) Engineering Task Force (ETF) in its “Technical Criteria and Procedures for Evaluating the Crashworthiness and Occupant Protection Performance of Alternatively-Designed Passenger Rail Equipment for Use in Tier I Service.” The research program was undertaken to verify the efficacy of using a combination of elastic testing and plastic analysis to evaluate the OVI of a passenger car loaded along its collision load path as prescribed in the ETF report. Earlier in this research program an elastic test of a Budd Pioneer car was used to validate an FE model of the car, per the ETF’s procedures. This model was then modified to reflect the condition of the car in its crippling test configuration. The model was used to simulate the crippling behavior of the car, following the ETF’s procedures. Two Pioneer cars were then tested to crippling to provide additional data to validate the FE model and the proposed alternative OVI evaluation. Because the test cars used in this research program were equipped with CEM systems, the alternative evaluation loads were placed at the locations where the energy-absorbing components attached to the occupant volume. During both crippling tests, loads were measured at each energy-absorber support location on the live and restrained ends of the car. Additional instrumentation used in the second crippling test included strain gages on the major longitudinal structural members, displacement transducers at each load location, and vertical, lateral, and longitudinal displacement transducers on the underframe of the car. The results of the FE analysis compare favorably with the results of the crippling tests. In particular, the crippling loads are consistent between the tests and analysis: crippling loads for the first and second cars tested were 1.15 and 1.19 million pounds respectively, and the pre-test FEA estimated a crippling load of 1.19 million pounds. The research program has established a technical basis for the alternative OVI requirements and methodology.


Author(s):  
Af'idah Af'idah ◽  
Miftahuddin Miftahuddin ◽  
Taufiqur Rohman

This research is motivated by the unavailability of teaching materials module for students. This research is a research and development, which the aims to produce a product of teaching materials such as Literacy Al-Qur'an Module effectively and efficiently. The subjects of this study were 23 fifth grade students of SD Rogomulyo 02 Kaliwungu District and accompanied by two validation experts. The data collection techniques used are observation, interviews, and test (Pretest and Posttest). The method for developing of literacy Al-Qur'an module uses Research and development steps developed by Borg and Gall. This steps are consist of 1) preliminary research, 2) product design, 3) validation, 4) product application, and 5) analysis.The results of this study indicate that, literacy al-Qur'an modules compiled by researchers, can improve learning achievement from the averages value of students above the KKM (Minimum completeness criteria). The conclusion is based on the processing of pre-test data of 64.52 and post-test of 77.86 using Paired Samples T-Test data resulting in an average correlation data of 0.806 and a significance value of 0,000. The results of the calculation of Paired Samples T-Test found the value of Sig. (2 tailed) is 0,000 ˂ 0.05, then H0 is rejected and Ha is accepted. Thus it can be concluded that there is an influence on using of literacy al-Qur'an module for students, it's proven any differences in the average between pre-test and post-test results of students or have comply the KKM (Minimum completeness criteria) in schools.


Author(s):  
Masahiro Akagi ◽  
Masashi Shinomiya ◽  
Junichi Sakaki ◽  
Shunji Sugai

The 3rd Research Center of the Technical Research and Development Institute (TRDI) of Japan Defense Agency (JDA) and Ishikawajima-Harima Heavy Industries Co., Ltd. (IHI) developed and tested the demonstrator of a high thrust-to-weight ratio small turbofan engine with an afterburner called “XF3-400”, the purpose of which is to establish engine technologies for the future supersonic aircraft for JDA. The development program started in 1981 and the first engine test was carried out in 1992. All the engine tests planned completed in March 1995 successfully. This paper reports the design, development and test results of the XF3-400 engine above.


2019 ◽  
Vol 13 (2) ◽  
pp. 68-88
Author(s):  
Abdy Windiartha

This research is taken from the lack of basic futsal technique that makes players tend to be fatigue in training which is given by the coach. Therefore, the development about basic training media, such as adobe flash player is necessary in learning process. This research focuses on the development of media in learning by using adobe flash player.This study is research and development. The development model of this research is adapted from the development model of Borg & Gall. Borg & Gall's development research stages are: (1) research and data collection, (2) planning, (3) product draft development, (4) first field test, (5) revise test results, (6) field test, (7) result field product test improvement, (8) field test implementation, (9) final product improvement, also (10) dissemination and implementation.This product contains material on futsal basic engineering practice. Media development using Adobe Flash CS6 Professional software. The material presented is (1) basic futsal technique, (2) brief futsal, (3) futsal rules, also (4) field size, line, goal and futsal ball. Based on the stages adapted from the development model of Borg and Gall then obtained the following results: Assessment and validation of the material experts showed that the medium of learning both with a mean value of 3.87. Assessment and validation of media experts showed that the medium of learning both with the average value 4. The results of small group trials showed very good result that is average 4.42. The results of large group trials showed excellent results with a mean of 4.55. In operational test and product effectiveness, pre test and post test of 2 groups were applied. The first group was given media influence, and the second group as the control group. Operational test results pretest value 73.92 seconds into the category enough, and for the average post-test value of 58.25 seconds into the category enough. The effectiveness test shows that the interactive learning media has significant effectiveness with t count value > t table that is 123,922 > 1,70329 and p value (significance) 0.000 < 0,05 meaning that the media is effective. As the final conclusion stated that the product proved effective. For the posttest average value of 58.25 seconds into the category enough. As the final conclusion stated that this product proved effective.ABSTRAK Penelitian ini dilatarbelakangi oleh minimnya model latihan teknik dasar futsal, sehingga pemain cenderung jenuh dengan materi latihan teknik dasar yang diberikan pelatihnya. Oleh karena itu, perlu adanya pengembangan mengenai media latihan teknik dasar futsal yang tadinya bersifat konvensional menjadi media yang berbasis adobe flash player. Penelitian ini bertujuan menghasilkan produk berupa media pembelajaran interaktif berbasis adobe flash player. Konten dalam media ini berisikan pengembangan materi latihan teknik dasar futsal untuk pembina/pelatih ekstrakurikuler futsal di SMA/SMK sederajat di Kabupaten Banjarnegara.Jenis penelitian ini merupakan penelitian dan pengembangan (research and development). Model pengembangan dalam penelitian ini diadaptasi dari model pengembangan Borg & Gall. Adapun langkah-langkah penelitian pengembangan yang dilakukan Borg & Gall yakni: (1) penelitian dan pengumpulan data, (2) perencanaan, (3) pengembangan draf produk, (4) uji coba lapangan awal, (5) merevisi hasil uji coba, (6) uji coba lapangan, (7) penyempurnaan produk hasil uji lapangan, (8) uji pelaksanaan lapangan, (9) penyempurnaan produk akhir, serta (10) desiminasi dan implementasi.Produk ini memuat materi tentang latihan teknik dasar futsal. Pengembangan media menggunakan software Adobe Flash CS6 Professional. Materi yang disajikan adalah (1) latihan teknik dasar futsal, (2) sejarah singkat futsal, (3) peraturan futsal, serta (4) ukuran lapangan, garis, gawang, dan bola futsal. Berdasarkan tahapan-tahapan yang diadaptasi dari model pengembangan Borg and Gall maka didapatkan hasil sebagai berikut: Penilaian dan validasi ahli materi menunjukkan bahwa media pembelajaran baik dengan nilai rerata 3,87. Penilaian dan validasi ahli media menunjukkan bahwa media pembelajaran baik dengan nilai rerata 4. Hasil uji coba kelompok kecil menunjukkan hasil sangat baik yaitu rerata 4,42. Hasil uji coba kelompok besar menunjukkan hasil sangat baik dengan rerata 4,55. Pada uji operasional dan efektifitas produk, diberlakukan pre-test dan post-test terhadap 2 kelompok. Kelompok pertama yang diberikan pengaruh media, dan kelompok kedua sebagai kelompok kontrol. hasil uji coba operasional nilai pre-test 73,92 detik masuk ke dalam kategori cukup, dan untuk nilai rata-rata post-test 58,25 detik masuk ke dalam kategori cukup. Uji efektifitas menunjukan bahwa media pembelajaran interaktif memiliki keefektifan yang signifkan dengan nilai t hitung > t tabel yaitu 123,922 > 1,70329 dan nilai p (signifikansi) 0,000 < 0,05 yang berarti bahwa media tersebut efektif. Sebagai simpulan akhir dinyatakan bahwa produk terbukti efektif. untuk nilai rata-rata post-test 58,25 detik masuk ke dalam kategori cukup. Sebagai simpulan akhir dinyatakan bahwa produk ini terbukti efektif.


2020 ◽  
Vol 4 (1) ◽  
pp. 61-72
Author(s):  
Rizki Yuliandra ◽  
Eko Bagus Fahrizqi

This study uses a research and development method with the aim of creating an endurance training model using a basketball, so that the exercise is not monotonous. This research was conducted at the student sports arena belonging to the Universitas Teknokrat Indonesia. In this study, observations were also carried out before making a training model, namely conducting interviews with basketball athletes and coaches. Models made by expert decisions. The result of the expert's assessment of the endurance with the ball training model is 82.7% of the training model is very feasible to use. Meanwhile, the results of product trials 82.8% of students with the endurance with the ball training model are very suitable for use. The pre-test and post-test results data were also tested for normality through the Liliefors test and the results were normal. To see whether this ball-training endurance model can improve the athlete's endurance ability, a 1200m running test was conducted. After carrying out the exercises with the new resistance training model, the post test results improved. The increase in the pre-test score from 2.8 in the medium category to the average post-test score of 3.8 in the good category. The study resulted in 17 models of endurance training that were effective to do.


2020 ◽  
Vol 6 (02) ◽  
pp. 01-10
Author(s):  
Fakhri Fajrin Kurniawan

The goal of this research and development is to produce development model training ball handling basketball for basketball athlete Senior High School. This research and development also done to find out in depth about: increased mobility in basketball athlete Senior High School and know the success rate development model training ball handling basketball reviewed from : effective, efficient, traction, productivity of the athlete in doing ball handling basketball for basketball athlete Senior High School. This research and development uses qualitative and uses development research methods Research and Development (R & D) Borg W. R and Gall. M. D. which uses 10 stages of development. The steps in this development research start from the following : (1) Research and information collecting, (2) Planning, (3) Develop preliminary form of product, (4) Preliminary field testing, (5) Main product revision, (6) Main field testing, (7) Operational product revision, (8) Operational field testing, (9) Final product revision, (10) Dissemination and implementation. Subjects in research and development is basketball athlete Senior High School. The results of this effectiveness test model training are uses statistical test with formula before-after (pre-test and post-test). The result of the pre-test calculation resulted in 781 with average 50,39 while the post-test resulted in 818 with average 52,77. Thus it can be concluded that the use of development model training ball handling basketball athlete Senior High School is effective in improving the individual skills of basketball athlete Senior High School.


Author(s):  
Widya Hapsari ◽  
Hari Wibawanto ◽  
I Made Sudana

Penelitian ini bertujuan mengembangkan perangkat pembelajaran mobile learning teknik digital bagi mahasiswa Pendidikan Teknik Elektro, menguji keefektifan dan kepraktisannya. Metode penelitian yang digunakan adalah Research and Development. Tahapan proses penelitian ini antara lain: (1) tahap pendahuluan, berupa studi literatur, penelitian pendahuluan tentang penggunaan smartphone, menganalisis silabus, menentukan substansi materi dan obyek pembelajaran; (2) tahap pengembangan, membuat peta program pembelajaran yang diintegrasikan ke mobile learning teknik digital; (3) tahap validasi, dilakukan oleh pakar media dan materi. Setelah memperoleh validasi dengan kriteria yang layak, maka dapat diujikan. Pengujian dilakukan di Jurusan Teknik Elektro Universitas Negeri Semarang dengan melibatkan 10 mahasiswa uji coba kelompok kecil dan 31 mahasiswa uji lapangan. Metode pengumpulan data berupa soal tes dan angket. Hasil uji validasi media sebesar 83,25% (sangat layak), sedangkan validasi materi sebesar 95,5% (sangat layak). Hasil uji coba kelompok kecil diperoleh skor rata-rata pre test 70,0 dan post test 89,0 dengan gain 0,63 (sedang). Hasil uji lapangan diperoleh skor rata-rata pre test 67,9 dan post test 85,2 dengan gain 0,54 (sedang). Hasil uji kepraktisan diperoleh 82,8% yang termasuk dalam kriteria sangat praktis. Dengan demikian dapat disimpulkan bahwa pengembangan mobile learning teknik digital ini layak, efektif dan praktis digunakan sebagai media pembelajaran mata kuliah teknik digital.This study aimed to develop learning tools of digital technique mobile learning for Electrical Engineering Education students, to test the effectiveness and practicality. The study used Research and Development method.The steps in conductingthis research include: (1) preliminary, by doingliterature study, preliminary research on smartphone usage, analyzing syllabus, determining material substance and learning objects; (2) development, by making a map of learning program which was integrated into digital technique mobile learning; (3) validation by media and material experts. After validated, the media could be tested. The test was done at Electrical Engineering Department of Semarang State University involving 10 studentsofsmall group test and 31studentsoffield test.The methods of data collection were testsand questionnaires. The result of material validation was 95.5% (very feasible). The result of small group test obtained pre-test average score of 70.0 and post-test average of 89.0 with gain 0,63 (medium). Field test results obtained pre-test average score of 67.9and post-test average score of85.2 with gain 0,54 (medium). Practical test results obtained 82.8% which meant very practical. Thus, it could be concluded that the development of digital technique mobile learning was feasible to be used as learningmedia.


2019 ◽  
Vol 2 (2) ◽  
pp. 54-63
Author(s):  
Redite Kurniawan ◽  
Esa Nur Wahyuni ◽  
Zubad Nurul Yaqin

Creative writing skills are still a challenge that must be faced by students of 6th grade in the Ar- Roihan Lawang Integrated Ibtidaiyah Madrasah. One of the contributing factor is the lack of interesting textbooks available at the school. This study aims to develop creative writing visual textbooks that improve students' skills in writing. This type of research is Research and Development (R & D) with the stage model Borg and Gall (2003). The stages include: needs analysis, product design, product development, product validity testing, testing on predetermined subjects, and product revisions. The results of this research and development of creative writing visual textbook products were based on the assessment of the media validator team with linguistic averages, presentation, graphics, scores of 4.72. Whereas from expert learning content with indicators of accuracy, attractiveness, and usability of 4, 29 are categorized very well. The product trial series found 33% addition in the experimental class post-test results and tested significantly with the number 0,000 SPSS t-test. Interviews in students indicated that creative writing visual textbook was very interesting so it can be concluded that this textbook product can improve the writing skills of 6th grade students of the Ibtidaiyah Ar-Roihan Lawang Madrasah.Keywords: Developing visual textbook, creative writing, writing skill.


2020 ◽  
Vol 11 (02) ◽  
pp. 176-187
Author(s):  
Arjun Fetru

MODEL LATIHAN PASSING FUTSAL UNTUK PUTRI TINGKAT SEKOLAH MENENGAH ATAS   Arjun Fetru1 Firmasyah Dlis2 Sri Nuraini3 1Pendidikan Olahraga, Pascasarjana Universitas Negeri Jakarta, Komplek Universitas Negeri Jakarta Gedung M. Hatta Jl. Rawamangun Muka, Jakarta Timur, Indonesia 13220 2Pendidikan Olahraga, Pascasarjana Universitas Negeri Jakarta, Komplek Universitas Negeri Jakarta Gedung M. Hatta Jl. Rawamangun Muka, Jakarta Timur, Indonesia 13220 3Pendidikan Olahraga, Pascasarjana Universitas Negeri Jakarta, Komplek Universitas Negeri Jakarta Gedung M. Hatta Jl. Rawamangun Muka, Jakarta Timur, Indonesia 13220   Email: [email protected]   Abstrak Tujuan penelitian ini ialah mengembangkan model latihan passing futsal untuk putri tingkat SMA. Pendekatan penelitian pengembangan model latihan ini menggunakan model Research and Development dari Borg and Gall. Subyek dari penelitian dan pengembangan ini ialah diperuntukan untuk putri tingkat SMA. Analisis data diperoleh 18 item model latihan yang layak dan efektif untuk meningkatkan keterampilan passing futsal. Dalam uji signifikansi didapat dari nilai proses (kesesuaian gerak) menunjukan mean= 2.133 selisih dari hasil pre-test dan hasil post-test, hasil t-hitung= 7.899 df= 29 dan p-value= 0.000 &lt; 0.05 yang berarti terdapat perbedaan yang signifikan antara sebelum dan sesudah diberikan perlakuan model latihan passing futsal untuk putri tingkat SMA dan penilaian hasil passing mean= 17.367 menunjukan selisih hasil pre-test dan post-test, hasil t-hitung= 86,626 df= 29 dan p-value= 0.000 &lt; 0.05 yang berarti terdapat perbedaan yang signifikan antara sebelum dan sesudah diberikan perlakuan model latihan passing untuk putri tingkat SMA. Dari kedua penilaian tersebut menunjukan terdapat perbedaan yang signifikan antara sebelum dan sesudah adanya perlakuan itel model latihan dan secara efektif dapat meningkatkan keterampilan passing futsal. Kata Kunci: Model, Latihan, Passing Futsal Abstract The purpose of this study is to develop a futsal passing training model for high school girls. The research approach to developing this exercise model uses the Research and Development model from Borg and Gall. The subjects of this research and development are intended for high school girls. Data analysis obtained 18 items of training models that are feasible and effective to improve futsal passing skills. In the significance test obtained from the process value (suitability of motion) shows the mean = 2,133 difference between the pre-test results and post-test results, the results of t-count = 7,899 df = 29 and p-value = 0,000 & lt; 0.05 which means that there is a significant difference between before and after the treatment of futsal passing training model for high school girls and the assessment of the results of the mean passing = 17,367 shows the difference between the pre-test and post-test results, the t-test results = 86,626 df = 29 and p -value = 0,000 & lt; 0.05 which means there is a significant difference between before and after being given a passing training model for high school girls. From the two assessments, there is a significant difference between before and after the treatment model exercise and can effectively improve futsal passing skills. Keywords: Model, Training, Futsal Passing


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