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조선소의 탑재공정 안전향상을 위한 Jib 크레인 디지털 트윈 구축
왕승열(SeungYeol Wang),김연준(Yeon-Jun Kim),이진혁(JinHyuk Lee),장재원(Jaewon Jang),노재규(Jac-Kyou No),오대균(Daekyun Oh) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
The utilization of simulation has been predominantly emphasized in the efforts directed towards educating and training crane operators to mitigate accidents arising from inexperience and negligence. However, a greater emphasis has frequently been placed on enhancing operating skills, leaving crisis management in challenging loading situations neglected. Thus, the aim of this study is to create a simulation environment that includes a first-person perspective, operational tools, and adverse conditions like wind. Furthermore, the scenario involving the simulation of the erection of a liquefied natural gas tank with wind is considered designed under virtual reality. The realism environment is enhanced through the establishment of collision and interference verification systems, in conjunction with a wind environment simulation setup providing an authentic experience of the challenges posed by wind-induced instability. Hence, this study enhances authenticity and indirectly acquaints workers with the intricacies and hazards of real crisis scenarios.
Shear Performance of PUR Adhesive in Cross Laminating of Red Pine
Hyung Kun Kim,Jung Kwon Oh,Gi Young Jeon,Hwanmyeong Yeo,Jun Jac Lee 한국목재공학회 2013 목재공학 Vol.41 No.2
Cross laminated timber, CLT, has been an rising issue as a promising building material replacing steel-concrete in mid story rise construction. But, there was no specific standard for CLT because it had been developed in industrial section. Recently, new draft for requirements of CLT was proposed by EN which suggested to evaluate the performance of adhesive in CLT by the same method as glulam. But, it has been reported that sh ear performance of cross laminated timber is governed by rolling shear. There-fore, block shear test s were carried out to compare parallel to grain laminating and cross laminating using commercial one component PUR, Poly urethane resin, .The result showed that the current glulam standard for evaluating bonding performance is not appropriate for CLT. Beacause shear strength of cross lami-nating decreased to 1/3 of parallel to grain laminating and this strength was representing shear performance of wood itself not the bond. However, cross laminating showed no significant effect on wood failure. Thus, wood failure can be used as a requirement of CLT bonding. Based on the results, cross laminating effect should be included when evaluating adhesive performance of CLT correctly and should be con-sidered as an important factor.