• 제목/요약/키워드: Heavy Equipment

검색결과 493건 처리시간 0.029초

HETS 차량의 교량 통과 가능성에 관한 연구 (Feasibility Study on Road Bridge Passed by Heavy Equipment Transporter)

  • 강영철;이필재
    • 한국군사과학기술학회지
    • /
    • 제12권2호
    • /
    • pp.236-247
    • /
    • 2009
  • In Korea, the driving system restriction criteria is strictly applied(gross weight 400kN, axial load 100kN). Especially after the Seoungsu Bridge accident, safety factor has been strictly applied. The Safety factor is applied to the cumulative results for each steps like design, construction, maintenance of the Bridge. Because of it, the bridge is undervalued compared to its capacity. So, this generates loss for both private and military sector(eg. logistical delays, structural damage, etc.). But analyzing data from many existing researches we have confirmed that the military heavy vehicle may pass through the first class bridges. In consequence, this study have focused on determining whether HETS vehicles can pass over the first class bridge, without safety issues, using MIDAS structural analysis program. The results have confirmed that the military heavy vehicle may pass over the bridge.

FPSO - Green Water Protector 구조 최적 설계 (The Optimum Design of Green Water Protector for FPSO)

  • 배명현;김성준;문중용
    • 대한조선학회 특별논문집
    • /
    • 대한조선학회 2007년도 특별논문집
    • /
    • pp.94-98
    • /
    • 2007
  • The latest development of the submarine oil field and the deep-sea explorer, FPSO is commonly proposed and used for offshore oil production. And because the fundamental requirement of FPSOs to remain moored at their position, they are unable to avoid severe weather and environment. FPSO normally operates head to the weather, and sensitive equipment located the exposed area will be influenced by green water damages, the damages may occur to both onboard equipment and topside structures with resulting risk to personnel. In this paper, the main focus considers the physical structures of green water protector in order to preserve topside structures, equipment and personnel from green water.

  • PDF

중장비용 유압구동형 수퍼차져의 유동특성 (Flow Characteristics of Hydraulic Driven Super-Charger for Heavy Equipment)

  • 김봉환;문철진
    • 한국기계기술학회지
    • /
    • 제13권4호
    • /
    • pp.37-42
    • /
    • 2011
  • The purpose of this study is to investigate the actual field application of the super-charger for heavy equipment. In this paper, the numerical analysis and performance evaluating experiments were performed. ANSYS CFX program has been used to obtain the solutions for the problems of three-dimensional turbulent air flow in the super-charger. To evaluate the flow performance of the super-charger, the performance test facility and data acquisition system were manufactured. We obtained satisfactory results from CFD analysis and flow experiment.

도저-굴삭기의 원격운전 제어기 개발 (Development The Controller Remote Operation for Dozzer and Excavator)

  • 박두용;신영진;김호열;이성우
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
    • /
    • pp.246-248
    • /
    • 2005
  • The power plants have a loading dock and unloading device for the diverse kinds of fuel such as the bituminous coal and natural gas imported by the sea from all over the world. To unload the coal in the ship not only in the environment-friendly manner but also in the cost-effective way, the new type of heavy equipment loaded with additional features as well as excavator and the remote controller to maneuver this equipment are developed. This heavy equipment, which can be used to unload the coal in the ship in conjunction with CSU (Continuous Ship Unloader), and the remote controller are endorsed by the related code and laws. With the remote controller, the field workers can operate the unloading equipment at the remote place far from the equipment as well as in the cabin for themselves without tile remote controller.

  • PDF

대형 컨테이너선 건조를 위한 고능률 용접기술 (High Productive Welding Technologies for Large Container Ship)

  • 구연백;성희준;최기영;김경주
    • 대한조선학회 특별논문집
    • /
    • 대한조선학회 2009년도 특별논문집
    • /
    • pp.80-86
    • /
    • 2009
  • In order to improve productivity of large container ship construction, large heat input and/or high productive welding technologies are necessary. This can be achieved by the joint research and cooperation among steel maker, welding consumable company, welding equipment company and ship yards. Two electrodes SAW process is effective the plate butt welding and partial joint welding, while FGB welding process is for the connection of block to block joint. The higher strength and thicker steel is developed, the more reliable welding procedure such as two electrodes EGW including light weight welding equipment should be developed.

  • PDF

고소작업대 조종훈련용 시뮬레이터 (Aerial Working Platform Training Simulator)

  • 기재석
    • 대한안전경영과학회:학술대회논문집
    • /
    • 대한안전경영과학회 2007년도 춘계학술대회
    • /
    • pp.133-141
    • /
    • 2007
  • Aerial working platform is recently used broadly in heavy industry and construction field and also the utilization of it is growing. However, the raise of critical incident caused by unskilled operator is increasing gradually. To reduce and prevent such incident, the training for operating is essential. It's not easy to cover the requirements for the training with real platform because of the high price of it, safety and weather condition. This paper proposes a simulator for the training based on virtual reality to give the training safely regardless to the weather condition and the simulator is deliverable in lower price than real one. The simulator proposed in this paper is available to be set according to the level of trainee managing the assessment level and be also applied for the design of general heavy equipment training simulator based.

  • PDF

변압기 예방진단을 위한 IEC61850 객체모델에 관한 연구 (The Study of IEC61850 Object Models for Transformer Preventive Diagnosis)

  • 황보승욱;오의석;김병진;김현성;이정복;박귀철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
    • /
    • pp.103-104
    • /
    • 2006
  • Since the first proposition of IEC61850 object model at 1993, many questions about making a seamless model have been issued. the reason which they have worry about is that the functions of the equipment are supposed to be changed properly and new equipment and scheme are need to be introduced according to user's application. To handle those issues, TC57 which is a IEC committee for power control and communication has continuously updated the object model. Nowadays along with the new object model involving power quality, distribution resource and wind power, the committee has a plan to announce the revision of IEC61850-7-4. In the study, authors will present the prediction and diagnosis object models for transformer. Transformer models for protection and control have already been dealt with in the international standard but the models for prediction and diagnosis have never mentioned until now. Designing the prediction and diagnosis functions with the existing IEC61850-7-4, it'll be shown what is a proper object model for prediction and diagnosis.

  • PDF

서울시 도로의 폭설대응방안 연구 : 서초 1동을 중심으로 (A Study on Countermeasures Against Heavy Snow on Road in Seoul : Focusing on Seocho 1-dong)

  • 원종석;배윤신;김상균
    • 한국도로학회논문집
    • /
    • 제16권3호
    • /
    • pp.67-74
    • /
    • 2014
  • PURPOSES : This study is to investigate the countermeasures against heavy snow on road in Seoul: Focusing on Seocho 1-dong. METHODS : Since 2000, three cases of the top 10 in the highest snow fall depth in a day occurred in 2001(234mm, 156mm) and 2010(258mm) and the possibility of heavy snow is getting higher. 10 days after heavy snow fall when the snow thaws, socio-economic damages occurred often. For example, the insufficient snow removing, difficulty in patients transfer, crash accidents, injuries from a fall, the increasing cost of snow removing etc. RESULTS : For the effective deploying snow removing equipment and workers, it is necessary to understand emergency snow removing spots. Seocho 1-dong was tested because it contains mountains, hill and urban areas as well as various buildings and road types exposures. CONCLUSIONS : Based on the domestic and international heavy snow researches, the elements for vulnerability were analyzed and vulnerable areas to snow fall were derived.

보일러 튜브 자동벤딩 생산시스템 개발 (Auto-Bending Manufacturing System for Boiler Tubes)

  • 이현수;강문현;박준곤;허관;성준석;허왕순
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1997년도 춘계학술대회 논문집
    • /
    • pp.450-454
    • /
    • 1997
  • This system is the automatic boiler tube bending equipment which has four heads for bending the tube and the carriage for moving the tube. The system consists of two frames for transporting each moving parts, high-frequency heating equipment for heating the tube in hot bending, control panel for inputting the job data operating, remote control unit for concetration and distribution of input/output, and the monitoring system which can establish unmanned operationby receiving the bending job data via LAN form a design teamwhich produces the job data and schedule based on master production plan and diagnoses bending data change, input, whole system status, and system malfunctions. By employing this system, 30% of production improvement was achieved was achieved comparing to the existing bending system.

  • PDF

굴삭기 유압실린더의 내구설계 기법에 관한 연구 (A Study on the Durability Design of a Hydraulic Cylinder for an Excavator)

  • 김영범;김판영;김인규;권학순;이민희;박진수
    • 대한기계학회논문집A
    • /
    • 제34권12호
    • /
    • pp.1901-1907
    • /
    • 2010
  • 굴삭기 유압실린더는 붐, 암, 버킷과 같은 작업장치를 작동시키는 핵심 부품이다. 일반적으로 유압실린더는 반복적인 고압으로 인해 좌굴이나 피로 파손과 같은 구조적 문제가 종종 발생한다. 따라서, 유압실린더의 내구설계 시 설계수명 동안의 피로, 항복, 좌굴 등에 대한 구조 안전도 평가가 반드시 이루어져야 한다. 내구설계는 기본설계와 상세설계 두 단계로 구성되는데, 기본설계 단계에서는 굴삭기의 작업능력, 작업속도, 작업영역 등을 고려하여 항복과 좌굴 안전도를 만족하도록 로드와 튜브의 주요 치수를 결정한다. 상세설계 단계에서는 로드 노치, 용접부, 튜브 끝단, 글랜드, 오리피스, 쿠션링 등의 상세치수를 주로 피로 안전도 측면에서 결정한다. 본 연구에서는 이러한 내구설계의 전반적인 절차와 각 설계 단계에서 내구설계 평가를 위한 해석기법에 대해 기술하였다.