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Analisa Reduksi Respon Getaran Kabel Konduktor Terhadap Variasi Massa Counterweight Pada Stockbridge Damper
No full textBerdasarkan Kementerian Energi dan Sumber Daya Mineral kapasitas pembangkit listrik di Indonesia kapasitas pembangkit listrik terus mengalami kenaikan setiap tahunnya. Kenaikan tersebut mengakibatkan peningkatan pendistribusian energi listrik ke daerah-daerah. Pendistribusian dapat ditingkatkan dengan menambah jumlah saluran listrik udara. Salah satu kendala pembangunan saluran listrik udara adalah adanya getaran aeolian. Getaran tersebut seringkali dapat mengakibatkan kerusakan pada kabel konduktor. Sehingga stockbridge damper selalu digunakan untuk meredam getaran tersebut. Pada saat ini stockbridge damper asimetris adalah stockbridge damper yang memiliki kinerja yang paling baik. Persebaran variasi berat total pada stockbridge damper asimetris semakin banyak di pasaran. Variasi berat total menjadi acuan penjualan di pasaran. Akan tetapi, perbedaan berat antara kedua counterweight tidak terlalu diperhatikan. Sehingga diperlukan penelitian tentang pengaruh variasi massa counterweight untuk mempermudah pemilihan stockbridge damper. Berdasarkan latar belakang yang telah disampaikan, penelitian tugas akhir ini akan mensimulasikan kabel konduktor dengan sebuah peredam stockbridge damper pada software ANSYS Workbench 2022 R1 dengan analisis Static Structural, Modal dan Harmonic Response. Pemodelan stockbridge damper yang digunakan pada simulasi adalah stockbridge damper yang sering ada di pasaran. Variasi yang digunakan pada simulasi adalah stockbridge damper dengan massa counterweight sisi ringan stockbridge damper tetap 1,5 kg dan variasi pada sisi berat stockbridge damper 2,5 kg, 3 kg, 3,5 kg, 4 kg, dan 4,5 kg pada variasi massa counterweight sisi berat stockbridge damper dengan massa counterweight sisi ringan stockbridge damper tetap. Sedangkan pada variasi massa counterweight sisi ringan stockbridge damper dengan massa counterweight sisi berat stockbridge damper tetap memiliki variasi pada sisi ringan stockbridge damper dengan massa counterweight 0,5 kg, 1 kg, 1,5 kg, 2 kg, dan 2,5 kg dengan massa counterweight sisi berat stockbridge damper tetap 3,5 kg. Dari simulasi yang telah dilakukan respon rasio getaran pada variasi massa Counterweight sisi berat Stockbridge Damper dengan massa Counterweight sisi ringan Stockbridge Damper tetap dan variasi massa Counterweight sisi ringan Stockbridge Damper dengan massa Counterweight sisi berat Stockbridge Damper tetap menunjukkan bahwa frekuensi natural pada kabel konduktor dengan stockbridge damper lebih kecil dibandingkan frekuensi natural pada kabel konduktor tanpa stockbridge damper. Persentase reduksi amplitudo getaran tertinggi terjadi pada variasi stockbridge damper dengan massa counterweight 2 kg dan 3,5 kg sebesar 99,21% pada frekuensi 33,8 Hz. Sedangkan persentase reduksi amplitudo getaran terendah terjadi pada variasi stockbridge damper dengan massa counterweight 1,5 kg dan 4 kg sebesar 77,83% pada frekuensi 30,8 Hz. Pada persentase reduksi amplitudo getaran kemudian dibandingkan dengan massa total stockbridge damper yang sama. Hasilnya menunjukkan bahwa stockbridge damper dengan selisih massa counterweight yang lebih kecil mampu mereduksi amplitudo getaran lebih besar dibandingkan dengan stockbridge damper dengan selisih massa counterweight yang lebih besar.
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According to the Ministry of Energy and Mineral Resources, power generation capacity in Indonesia continues to increase every year. This increase resulted in an increase in the distribution of electrical energy to the regions. Distribution can be increased by increasing the number of air power lines. One of the obstacles in the construction of aerial power lines is the presence of aeolian vibrations. The vibration can often result in damage to the conductor cable. So stockbridge damper is always used to dampen the vibration. At this time the asymmetrical stockbridge damper is the stockbridge damper which has the best performance. The distribution of total weight variations on asymmetrical stockbridge dampers is increasing in the market. The variation in total weight is a reference for sales in the market. However, the difference in weight between the two counterweights is of little concern. So that research is needed on the effect of variations in counterweight mass to facilitate the selection of stockbridge dampers. Based on the background that has been presented, this final project research will simulate conductor cables with a stockbridge damper in the ANSYS Workbench 2022 R1 software with Static Structural, Modal and Harmonic Response analysis. The stockbridge damper modeling used in the simulation is the stockbridge damper which is often on the market. The variation used in the simulation is a stockbridge damper with a fixed counterweight mass of the light side of the stockbridge damper 1.5 kg and variations on the heavy side of the stockbridge damper 2.5 kg, 3 kg, 3.5 kg, 4 kg, and 4.5 kg on variations of the counterweight mass of the heavy side of the stockbridge damper with a fixed counterweight mass of the stockbridge damper. Whereas on the counterweight mass variation on the light side of the stockbridge damper with the counterweight mass on the heavy side of the fixed stockbridge damper, there are variations on the light side of the stockbridge damper with a counterweight mass of 0.5 kg, 1 kg, 1.5 kg, 2 kg, and 2.5 kg with a fixed counterweight mass of 3.5 kg on the heavy side of the stockbridge damper. From the simulations that have been carried out the vibration ratio response on the variation of the mass of the heavy side counterweight of the Stockbridge Damper with the mass of the light side of the fixed Stockbridge Damper Counterweight and the variation of the mass of the light side of the Counterweight of the Stockbridge Damper with the mass of the heavy side of the Counterweight of the Stockbridge Damper still shows that the natural frequency in conductor cables with a stockbridge damper is smaller than the natural frequency in conductor cables without a stockbridge damper. The highest percentage of vibration amplitude reduction occurs in the stockbridge damper variation with a counterweight mass of 2 kg and 3.5 kg of 99.21% at a frequency of 33.8 Hz. While the lowest vibration amplitude reduction percentage occurs in the stockbridge damper variation with a counterweight mass of 1.5 kg and 4 kg of 77.83% at a frequency of 30.8 Hz. The percentage reduction of the vibration amplitude is then compared with the total mass of the same stockbridge damper. The results show that the stockbridge damper with a smaller counterweight mass difference is able to reduce the vibration amplitude greater than the stockbridge damper with a larger counterweight mass difference
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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