http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
EM센서를 이용한 1860MPa 및 2200MPa 고강도 강연선 도입장력 측정모델에 관한 실험
박원태 ( Park Weon Tae ),천경식 ( Chun Kyoung Sik ),송수용 ( Song Su Yong ) 한국복합신소재구조학회 2016 복합신소재구조학회논문집 Vol.7 No.4
Measuring the exact cable tension force is important to cable supported bridge under construction and on service. This study was planned to propose EM(electro-magnetic) sensor-based method for measuring the tension force of MS(multi-strand) cable in cable-stayed and extradosed bridge. The tension force in each strand is the same due to MS cable construction using Iso-tensioning system. Therefore, In this prosed method, EM sensor was installed directly at a strand and the measurement model was established for estimating the tension force of strand via EM sensor by experiments. The measurement model was derived from the relation of tension force and magnetic permeability. Also, the magnetic permeability is shown to be different according to the magnetization characteristic of 1860MPa and 2200MPa high-strength strand. The difference is increased as tension force increases. Additional experiment was conducted to verify the measurement model. As a result, the distribution of strand tension calculated upon the EM sensor is similar to those of tension measured by load cell. This proposed approach can be an effective tool for monitoring and measuring the cable force of MS cable.
이덕구(Deok Gu Lee),조남철(Nam Cheol Cho),이길호(Kil Ho Lee),김기수(Ki Su Kim),송수용(Soo Yong Song) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Facilities and economic development of plant facilities, the countrys underlying facilities to improve the energy efficiency of many studies are under way. In particular, ultra supercritical pressure power plants or under construction, stops the development of the critical pressure power plants and boilers that contributes main feed water control valve or main steam dump valve at the fluid cavitation and vibration control out of pipes and valves due to breakage and damage to parts of the plant raises a number of cases has caused them to stop the coup. In this study, we confirmed through the analysis of computation fluid dynamics and field demonstration test that in the control valve trim structure, 3-D Wave Trim with the flow path of Z-axis fluid collision, XY-axis labyrinth and flexion type could dissipate the energy by fluid resistance, turn number, flow path area etc and result in pressure drop down.