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유체역학적 해석을 위한 선망 어구 운동의 동적 시뮬레이션

Dynamic simulation of a Purse seine net behavior for hydrodynamic analysis

  • 발행 : 2002.05.01

초록

본 연구는 유체역학적 해석을 이용하여 선망 어구 운동을 동적으로 시뮬레이션하였다. 선망 어구는 조업 과정 중에 어구의 형상이 크게 바뀌는 특성이 있고, 모든 조업단계에서 어구요소가 3차 시스템이며 대부분 망지라는 유연한 물체에 의해 구성되어 있어 외력에 대해 그 형상이 비선형적으로 변하므로 모델링이 어렵다. 본 연구에서는 질량-스프링 모델을 이용하여 수학적으로 기술하였다. 선망의 조업 과정중 그물의 투망, 침강, 죔줄을 죄는 과정의 어구운동을 시뮬레이션하였다.

This study presents a dynamic simulation of a purse seine net behavior Mathematical model suitable for purse seining, which is based on data from a series of previous simulations, various field experiments, is modelized as a set of mass-spring system. In this model, a number of meshes are approximated as one mass point, each of which connected to its neighbors by massless springs, the equations of motion are derived from considering internal force from the springs and external forces such as resistance and gravitation. This simulation shows the quantitative state on every mass point of the net and purse line during the shooting and pursing phases. So it is possible that performance of a purse seine net be analyzed using various and evolving parameters such as the shooting speed, the hauling speed, the size or type of the sinker, float and twine, also the hanging ratio etc.

키워드

참고문헌

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  3. The simulation of the geometry of a tuna purse seine under current and drift of purse seiner vol.36, pp.14, 2009, https://doi.org/10.1016/j.oceaneng.2009.06.011
  4. A method for improving the dynamic simulation efficiency of underwater flexible structures by implementing non-active points in modelling vol.65, pp.9, 2008, https://doi.org/10.1093/icesjms/fsn126
  5. Fishing performance of hull form renovated tuna purse seiner vol.51, pp.3, 2015, https://doi.org/10.3796/KSFT.2015.51.3.321