제품문의

Ansys AQWA

제품문의

Ansys AQWA는 파도, 바람, 조류 등의 영향으로 인한 부유 구조물의 동적 거동을 시뮬레이션 하는 프로그램입니다.

이를 이용하여 FPSO(Floating Production Storage and Offloading systems), 반잠수식 시추선, TLP(Tension leg platform), 선박, 신재생에너지 시스템, 방파제 등을 시뮬레이션 할 수 있습니다. AQWA는 1970년대 중반 영국(WSAtkins)에서 개발한 AQWA-Float을 기반으로 1980년대 해양구조물이 심해로 이동함에 따라 새로운 유체역학적 평가를 목적으로 AQWA-Suite이 개발 되었습니다. 2005년 Ansys가 이를 인수하면서 현재도 꾸준히 개발되고 있는 소프트웨어 입니다.

Ansys AQWA는 아래와 같은 이론을 기반으로 합니다

3D Potential Theory solution

  • Ideal fluid, irrotational, incompressible
  • Small wave elevation
  • Viscous forces are not taken into account

Boundary condition problem is solved by satisfying

  • Body Boundary condition
  • Linearized free surface condition
  • Sea bed boundary condition
  • Radiation condition
  • Solution for diffracted and radiated wave potentials uses a pulsating source distribution (zero speed solution with forward speed corrections)
  • Theory applies to finite depth and diffraction problem is solved in frequency domain
  • Shallow water solution is available
  • Both 1st Order and 2nd Order wave forces are calculated

Ansys DesignModeler와 직접 연동되며, 외부 캐드 모델을 불러서 기하형상을 변수 처리화 할 수도 있습니다.

Ansys AQWA는 기존 해석 환경인 AGS(AQWA Graphic Supervisor) 뿐만 아니라 Ansys Workbench 환경에서도 작업이 가능합니다

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AGS 환경 / Workbench 환경
[Workbench 환경에서의 Ansys AQWA 구동 사례]

Ansys AQWA 제품군

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Hydrostatic Results

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방향 별 RAO 결과

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AQWA 해석 결과

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Load Mapping한 구조 해석 결과

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Hydrodynamic Diffraction(Frequency Domain)과 Hydrodynamic Response(Time Domain)

Ansys AQWA 제품군

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Omni-Directional Fender / Uni - Directional Fender
  • Joint를 활용하면 서로 다른 구조간의 다양한 관절 조건을 구현할 수 있습니다

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Ball and Socket Joint / Universal Joint / Hinged Joint / Rigid Joint
  • Mooring Line을 활용하면 부유체의 계류 효과 뿐만 아니라 계류 시스템 설계를 할 수 있습니다

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Tension Leg 구현 / 복잡한 케이스 설계 / Spar 계류 모델링

Diffraction Analysis

  • Hydrostatic Results
  • Multiple structures including hydrodynamic interaction
  • Hydrodynamic coefficients(added mass and damping)
  • RAOs
  • Drift coefficients (Near / far field full QTF matrix)
  • Shear Force / Bending Moment Splitting forces
  • Pressure distribution for transfer to structural model

Equilibrium and Stability

  • Computes static equilibrium position for multiple environmental and mooring configurations
  • Preliminary mooring design
  • Calculates static / dynamic stability

Frequency Domain

  • Significant motions at low frequency/wave frequency in frequency domain
  • Permits rapid analysis using linearized parameters of mooring systems
  • Graphs for response spectra / RAOs & other parameters
  • Wave spreading and 2D spectra

Time Domain

  • Time-history analysis of multiple structures with irregular waves
  • Can use full QTF matrix for shallow water conditions
  • Import of wave height time history
  • Input of forces via user-defined .dll
  • Output of motions and forces
  • Graphical and animation results

Large amplitude motions

  • Time-history analysis of multiple structures with irregular waves
  • Can use full QTF matrix for shallow water conditions
  • Import of wave height time history
  • Input of forces via user-defined .dll
  • Output of motions and forces
  • Graphical and animation results

Cable dynamics

  • Additional cost item for more rigorous simulation of mooring line behaviour
  • Provides full coupled vessel/mooring line analyses

Excel Interface

  • AQWA specific functions add-in for Excel for data and results retrieval, processing and report generation

환경 하중 조건

Regular Waves1

  • Airy Waves
  • Stokes 2nd-Order Waves

Multi-Directional Wave Spectrum

  • Pierson-Moskowitz (PM) spectrum
  • JONSWAP spectrum
  • Gaussian
  • User-defined spectrum
  • Cross Swell

Wind

  • Uniform wind
  • Ochi and Shin wind spectrum
  • API wind spectrum
  • NPD wind spectrum
  • User-defined wind spectrum

Current

  • Uniform velocity current
  • Velocity profiled current