EPI International Journal of Engineering最新文献_第4页

Characteristic of Vibration Signal from Cutting Tool Against Steel ST60 for CNC Turning Monitoring System 数控车削监控系统中刀具对钢ST60的振动信号特性

EPI International Journal of Engineering Pub Date : 2022-02-28 DOI: 10.25042/epi-ije.022022.06

Muh Fachrul, A. Y. Aminy, A. Hayat

{"title":"Characteristic of Vibration Signal from Cutting Tool Against Steel ST60 for CNC Turning Monitoring System","authors":"Muh Fachrul, A. Y. Aminy, A. Hayat","doi":"10.25042/epi-ije.022022.06","DOIUrl":"https://doi.org/10.25042/epi-ije.022022.06","url":null,"abstract":"Kondisi insert secara signifikan mempengaruhi kualitas produk dan efisiensi pembuatan mesin bubut. Studi ini menggunakan distribusi kerapatan spektral daya dari sinyal getaran accelerometer mesin bubut CNC untuk merancang sistem klasifikasi kondisi sisipan pahat yang dapat diterapkan pada kondisi pemesinan yang berbeda. Untuk empat kondisi sisipan pemesinan bubut yang umum (yaitu tepi terpasang, keausan flank, normal, dan fraktur), Dalam hal ini, sistem klasifikasi kondisi sisipan dibuat dengan dua tahap—pemodelan kondisi sisipan dan fusi model pemesinan. Pada tahap pemodelan kondisi insert, fitur magnitudo frekuensi tersegmentasi ditangkap menurut distribusi kerapatan spektral daya dari sinyal getaran akselerometer. Root mean square error (RMS) dan Fast Fourier Transform (FFT) dihitung untuk melakukan studi prediksi getaran menggunakan alat potong bubut. hasil sinyal mentah pada kondisi percobaan baru, nilai RMS berada pada kisaran 6,24-6,23, dan FFT 0,0007-0,0009. kondisi baik, kondisi sinyal mentah menunjukkan nilai RMS berada pada kisaran 54.36-67.08 dan FFT 0.0068-0.0080, kondisi sinyal mentah sedang, nilai RMS 83.05-112.07, dan nilai FFT 0.0089-0.0147, buruk Kondisi raw signal nilai RMS 125.14-152.09 dan nilai FFT 0.0137-0.0178. Dapat disimpulkan bahwa data terbaik yang dapat digunakan untuk proses prediksi kerusakan mata alat menggunakan metode cluster data dengan menggunakan nilai tegangan RMS pada sinyal mentah dan magnitudo pada proses FFT adalah data pengukuran tegangan RMS untuk sinyal mentah karena data sinyal mentah menyediakan rentang pengukuran yang luas. berbanding lurus antara kerusakan bilah alat dan peningkatan voltase di RMS, dan cluster data dikelompokkan dengan baik.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"10 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114036001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison the Strength of Midship Structures With Margin Plate and Without Margin Plate 有缘板与无缘板的船中结构强度比较

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.09

A. Ardianti, Rosmani Munandar, H. Haryono, G. Sitepu, H. Hamzah

{"title":"Comparison the Strength of Midship Structures With Margin Plate and Without Margin Plate","authors":"A. Ardianti, Rosmani Munandar, H. Haryono, G. Sitepu, H. Hamzah","doi":"10.25042/epi-ije.022021.09","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.09","url":null,"abstract":"Margin plate is a part of bottom construction that joint the floor and frame construction of the ship, so the inner bottom plate will be installed cut off on the margin plate. Lately the bottom construction of the ship tends not to use the margin plate. The ship is currently built with an inner bottom plate continuously from the left side to the right side of the ship.This study aims to determine the transversal and longitudinal strength ratio of ships with and without margin plate. The analysis was carried out by using Finite Element Method so-called ANSYSTM. The result shows if the loadvariatied 0.2 x maximum load on the calculation of the transverse strength of the ship, the stress value on the ship model with a margin plate was 9.6242 (N/mm2) and on the ship model without margin plate was 8.4739 (N/mm2) under conditions 100%. The results of the comparison due to bottom load averaged 15.82%. The difference in stress due to the effect of deck loads was an average of 13.49% while the effect of side loads was on average 8.74%. The longitudinal strength of the ship was also a varied of every increase of 0.2 x maximum moment with a review point of meeting between bottom plate and bilga plate for the ship model without margin plates using the Multi Point Constraint (MPC) method looking for results in sagging conditions of 12,443 (N / mm2) and the hogging condition was -11.045 (N / mm2) at 100% x maximum moment load conditions. So that the ship model with a margin plate sagging condition was 23,189 (N / mm2) and hagging condition was -20,585 (N / mm2). The results showed the stress that occurred in the ship model without using margin plate was better to withstand the transverse and longitudinal strength of the ship compared to the ship model with the margin plate.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122517544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Contact-Free Mortuary Trolley Design as a Device for the Mobility of Covid-19 Victims 新型冠状病毒病死率移动装置的非接触式太平车设计

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.04

Vania Katherine Mulia, Nanda Indriana, Qurriyatus Zahro, F. Triawan

{"title":"Contact-Free Mortuary Trolley Design as a Device for the Mobility of Covid-19 Victims","authors":"Vania Katherine Mulia, Nanda Indriana, Qurriyatus Zahro, F. Triawan","doi":"10.25042/epi-ije.022021.04","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.04","url":null,"abstract":"The Covid-19 pandemic has caused many issues, especially in the medical field. One of the groups that are affected by the pandemic the worst is the health workers. The surge of demand for health services, especially for Covid-19 patients, overwhelms health workers, forcing them to work extra hard and eventually experience exhaustion. Due to this condition, the health workers may face difficulties in doing heavy-duty work. This paper proposes a design of a mortuary trolley as a device to ease the health workers in handling the dead bodies of Covid-19 victims. Considering the need for a corpse mobility aid that is contact-free, the design utilizes a combination of a scissor lift structure, a power screw mechanism to elevate and lower the table, and a conveyor system to load and unload the table. To ensure that the device can operate without experiencing unwanted failure, strength analyses are done on the most critical components, such as the scissor arm, pin joint, power screw, and scissor arm connector, to determine the safety factor at maximum load in static and fatigue loading condition. Analysis results show that all those components have a safety factor greater than 1 for both static and fatigue loading conditions, indicating the device will not yield and is predicted to have infinite life. The design and analyses of this device can be a reference for manufacturers of medical devices to design a mortuary trolley to ease the work of health workers.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126579375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of Transit Area in Public Open Space of Losari Beach Makassar Pavilion on the Activities of Group Visitors 洛萨里海滩望加锡馆公共开放空间中交通区域对团体游客活动的影响

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.13

Miftahul Jannah B, T. Martosenjoyo, R. Mulyadi

{"title":"The influence of Transit Area in Public Open Space of Losari Beach Makassar Pavilion on the Activities of Group Visitors","authors":"Miftahul Jannah B, T. Martosenjoyo, R. Mulyadi","doi":"10.25042/epi-ije.022021.13","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.13","url":null,"abstract":"Urban communities are social beings who have a high level of activity. One of the activities to release fatigue is a refreshing type of activity. A developing city like Makassar needs open space for the public as a container for community activities, including refreshing activities. The Losari Beach Pavilion is present as an open public space that is visited by the majority of visitors in groups to carry out refreshing activities. This public space has a space configuration whose design is available in several parts of the room as a stopover for visiting activities. This part of the space shows that the activities are overlapping so that space is used in the transit space and some of it becomes empty space. Therefore, this research was conducted to explain the effects of what happens to transit space and empty space, in this case the space that is not functionally stopped. This study used the descriptive qualitative method. The data collection technique uses the behavior mapping method by recording activities and sketches to get an image of the activity pattern carried out by group visitors then presented in tables, pictures and descriptions. The results of the study show that the transit space is a place of stopover because of the influence of spatial area, visibility, historical area, iconic elements, social interaction, while the shelter space was not functionally visited due to the influence of minimizing visibility, social interaction, and arrangement of attribute elements.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132820391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Artificial Lighting Analysis of Study Rooms in Dormitories and Classrooms Islamic Boarding School Of Lil Banat Parepare Lil Banat Parepare伊斯兰寄宿学校宿舍和教室自习室人工照明分析

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.12

Nimah Natsir, N. Jamala, A. Kusno

{"title":"The Artificial Lighting Analysis of Study Rooms in Dormitories and Classrooms Islamic Boarding School Of Lil Banat Parepare","authors":"Nimah Natsir, N. Jamala, A. Kusno","doi":"10.25042/epi-ije.022021.12","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.12","url":null,"abstract":"This study aims to find out the intensity of light in the study room of Islamic boarding school of DDI Lil Banat Parepare. Measurements are taken in rooms that are often used by students to learn, namely classes and dormitories. The type of research used is quantitative by simulation method. Variables are tied to exposure measurement i.e. light intensity. While the variables are free, namely the arrangement of light points and the layout of the study room. Measurements were carried out over three days using a digital lux meter tool. The measurement results showed that the intensity of light in the dormitory did not meet the Indonesian National Standard for study space both night and day. During the day classrooms meet Indonesian National Standards but not at night. Although students as a space user is comfortable with the condition of light intensity in the study room and can learn according to these conditions, students still feel some complaints in the form of sore eyes, tense eyes and difficulty focusing. Thus, researchers made recommendations on the design of study rooms that can make students more comfortable learning in dormitories and classrooms so as to reduce complaints while studying. Lighting design recommendations are made in several alternatives by adding the number of lamps and changing the type of lamp using Dialux simulation. The simulation results of the study room lighting design recommendations have met the standards for use so that it can be applied to dormitories and classes at the Islamic boarding school of DDI Lil Banat Parepare. \u0000 \u0000Keywords: Artificial lighting design; study room; light intensity","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132501646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Accessibility Based on User Perception of Rehabilitation Center for People with Physical Disabilities (BRSPDF) Wirajaya Makassar Wirajaya Makassar残疾人康复中心(BRSPDF)基于用户感知的可达性

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.14

Mutmainna Mansyur, T. Martosenjoyo, E. Syarif

引用次数: 0

The Comparison of Fractional Derivative Model and Classical Spring-Dashpot Model in the Identification of Viscoelastic Characteristics of a Rubber Material 分数阶导数模型与经典弹簧-阻尼器模型在橡胶材料粘弹性特性辨识中的比较

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.06

D. Narita, Y. Ohta

{"title":"The Comparison of Fractional Derivative Model and Classical Spring-Dashpot Model in the Identification of Viscoelastic Characteristics of a Rubber Material","authors":"D. Narita, Y. Ohta","doi":"10.25042/epi-ije.022021.06","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.06","url":null,"abstract":" In the design of viscoelastic materials used in rubber products, not theoretical approaches but experimental approaches have been usually employed. This is due to the difficulties in mathematical procedures of the dynamic material characteristics such as the dependencies of strain amplitude, frequency and/or environmental temperature in deformation. In mathematical approach there are two kind of analytical models for a complex module of the material, which are a fractional derivative model and a spring-dashpot model. However there are few papers dealing with the study of the identifications of parameters for the experimental modulus actually obtained not only by using the fractional derivative model but also by using the spring-dashpot model and the discussion of the comparisons of the two models. In the present paper, the complex elastic modulus for a rubber material are obtained experimentally for a wide range of excitation frequency, and the modulus-frequency relations are derived analytically by using the two models, respectively. Finally, the applicability of the models are discussed from the numerical results.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131396889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study of the Tofu Industry Environmental Impact Condition and Scenario Treatment Using Life Cycle Assessment Approach 基于生命周期评价方法的豆腐产业环境影响状况及情景处理研究

EPI International Journal of Engineering Pub Date : 2021-09-15 DOI: 10.25042/epi-ije.022021.02

Intan Rahmalia, Syifa Khairun Nisa, Vita Palupi, Aninda Putri, I. W. Suryawan

{"title":"A Study of the Tofu Industry Environmental Impact Condition and Scenario Treatment Using Life Cycle Assessment Approach","authors":"Intan Rahmalia, Syifa Khairun Nisa, Vita Palupi, Aninda Putri, I. W. Suryawan","doi":"10.25042/epi-ije.022021.02","DOIUrl":"https://doi.org/10.25042/epi-ije.022021.02","url":null,"abstract":"One of the types of tofu industries in Indonesia is that the small-scale tofu industry was located in the East Jombor, Ketapang Village, to be precise, on the Blorong River. The Simplified Tofu Industry, with a 1300 kg/day production capacity, produces liquid waste that is disposed of into the Blorong River with a BOD parameter of 2,726 mg/L, COD of 4,972 mg/L, and TSS of 388 mg/L.These values greatly exceed the quality standards based on the Regional Regulation of Central Java Province Number 10 of 2004 concerning Tofu Industry. The entry of these pollutants into the Blorong River, over time, can cause water bodies to become toxic and pollute the Blorong River. Therefore, one of the efforts to protect this river's environmental conditions is to increase the efficiency of the Wastewater treatment plant and substitute the determined fuel through alternative scenarios. In the MBBR scenario, substituting diesel fuel into biomass is a type of biodiesel. Biodiesel has an advantage for the fire tube boiler industry because it can reduce exhaust emissions compared to diesel. Meanwhile, the existing wastewater treatment is substituted for the MBBR unit. The choice of MBBR as a wastewater treatment unit is because it is economical, does not require large land, is simple in development design, and is accessible in operation and maintenance. In the second scenario (SBR), a transition of Diesel fuel to LPG. LPG as a fuel input in the cooking process will result in cleaner emissions, especially on the SO2 parameter, and better because it has a higher heating value than diesel, 47,3 Tj/Gg. Both scenarios are analyzed regarding the magnitude of the impact on the environment using the OpenLCA method. The resulting impact magnitude on the OpenLCA method from each alternative is evaluated to obtain the best scenario. In the Tofu Industry, the best design the resulting impact is smaller than the SBR alternative. \u0000 ","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"114 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113969571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Function, Space, Form and Meaning of the Traditional House of Tolaki Tribe in Konawe, Southeast Sulawesi 苏拉威西东南部科纳威托拉基部落传统房屋的功能、空间、形式与意义

EPI International Journal of Engineering Pub Date : 2021-08-30 DOI: 10.25042/10.25042/epi-ije.082021.10

Nidia Islamiah, R. Wikantari, A. Kusno

{"title":"The Function, Space, Form and Meaning of the Traditional House of Tolaki Tribe in Konawe, Southeast Sulawesi","authors":"Nidia Islamiah, R. Wikantari, A. Kusno","doi":"10.25042/10.25042/epi-ije.082021.10","DOIUrl":"https://doi.org/10.25042/10.25042/epi-ije.082021.10","url":null,"abstract":"The architecture of traditional house of the Tolaki tribe has characteristics that indicate the activities, identity and socio-cultural values of the community. This study aims to examine the function, space, form, and meaning of the traditional house of the Tolaki tribe. Field surveys were conducted at Meluhu Village in Meluhu District and Asambu Village in Unaaha District of Konawe Regency. This research is qualitative with phenomenological method. Data were collected through field observations, in-depth interviews, and document studies. The objects of research were is Laika Mbuu and Laika Aha houses which were selected from nine forms of Laika in Konawe Regency using purposive-criteria sampling technique. Data were analyzed descriptively, then the results were discussed and associated with relevant theories. The result reveals that the function of Laika Mbuu and Laika Aha is formerly the residence a Mokole (King) and a place to hold traditional ceremonies. However nowadays Laika Mbuu has become a communal gathering place and other public purposes, whereas Laika Aha become a customary house for ceremonial events. The spatial arrangement of Laika Mbuu has no partition so that the local community carries out all activities in one open space, whereas Laika Aha contains partitions that divide the space into several rooms. Both the Laika Mbuu and Laika Aha have a rectangular building shape. The square shape on the building facade shows a bottom container called Kalo Sara, which is a set of objects as symbol of social class and has a meaning as customary law in the Tolaki community. This research concludes that both the Laika Mbuu and Laika Aha have similar function and form, however different spatial arrangement. Both the Laikas express many symbolic meanings, among others that the house as symbol of a human body, and the residents symbolize organs of the human body, so that once the house is built and filled, it must try to protect itself from all obstacles and calamities.","PeriodicalId":387754,"journal":{"name":"EPI International Journal of Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121267219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accurate Results for Free Vibration of Doubly Curved Shallow Shells of Rectangular Planform (Part.2 Thickness effect) 矩形平面双弯曲浅壳自由振动的精确结果(2)厚度效应

EPI International Journal of Engineering Pub Date : 2021-08-30 DOI: 10.25042/10.25042/epi-ije.082021.13

Y. Narita

引用次数: 2