구매정보
사용 방법 및 문의
지원요소 및 해석 기능
LNG System 은 LUSAS 제품의 기능수준별 분류 중 Plus 에 해당하며, 아래 기능을 포함합니다.
1. LNG System 기능 요약
구분 | 내용 요약 |
|---|---|
Advanced High-performance element library
: Bar, Beam, Plate, Plane stress/strain, Joint/spring/gaps, Shell, Solid, Axisymmetric solid/shell 80여종 Extended advanced high-performance element library: Curved Bars/Beams/Shells/Solid 등 고차요소 30여종 | |
Standard : 선형정적, 선형좌굴, 고유진동, IMD (Interactive Modal Dynamic), 피로 Nonlinear : 기하비선형 : 재료비선형 (콘크리트 균열, 크리이프 및 건조수축, Mohr-Coulomb 지반, 수화열 등) : 경계비선형 (시공단계별 해석) Dynamic : Implicit/Explicit Dynamic Thermal/Field : 정적열해석, 시간이력열해석, 열-구조 커플해석 (온도에 따른 재료특성 변화 적용) IMDplus : Interactive Modal Dynamic Plus RC Slab/Wall Design : 철근콘크리트 구조에 대한 철근배근 조건 및 각국 시방서에 따른 설계검토 LNG : 본 홈페이지게 기술된 LNG 탱크 모델링, 해석 및 설계검토 |
2. 해석 기능 상세
(1) General System Facilities
Online help
Comprehensive error diagnostics
User defined element and nodal output options
Full range of load types
General purpose load curve input
Generalised constraint equations
Resolution for multiple load cases
Flexible restart facility
Superelements (substructures)
Efficient automatic frontwidth optimisation
Efficient frontal equation solver for both large and small problems
Pre-conditioned conjugate gradient iterative solver for fast solutions of large problems
(2) Verification
Rigorous internal Quality Assurance procedures
Comprehensive machine checked testing
HECB calibration and NAFEMS calibration tests
(3) Implicit Stress Element Types
Plane frame/truss
Grillage
Space frame/truss
Curved thin and thick beams with constant/variable cross sections
Plane stress/plane strain
Plate flexure (thin and thick)
Ribbed plates
Axisymmetric solids with non axisymmetric loading
Axisymmetric membranes
Axisymmetric thin shell
Flat thin shells
Curved thin Semiloof shells
Flat/curved thin/thick co-rotational shells
3D solids
Composite shell
Composite solids
Generalised joint/gaps including seismic isolators, viscous dampers, lead rubber bearings and friction pendulum
2D plane stress/plane strain/ axisymmetric solid crack tip
Pore water pressure modelling (Plane strain only)
(4) Explicit Stress Element Types
Plane stress/strain with hourglass stabilisation
Solid with hour glass stabilisation
(5) Thermal (Field) Element Types
Bars
Plane
Axisymmetric solids
Axisymmetric membranes
3D solids
Links
(6) Solvers
Frontal (direct) solver
Iterative (PCG) solver
Fast multifrontal direct solver
Fast multifrontal block Lanczos eigensolver
Fast complex eigensolver
(7) Linear Materials
Isotropic, orthotropic, anisotropic and rigidity models
Isotropic and orthotropic thermal materials
Composite lay-ups for shell and solid material models
Temperature dependency for all linear material models
(8) Nonlinear Materials
Plasticity model with isotropic and kinematic hardening using von-Mises criteria, includes a backward Euler stress update algorithm with consistent tangents
Anisotropic plasticity model with isotropic hardening using Hill or Hoffman criteria, includes a backward Euler stress update algorithm with consistent tangent
Plasticity model with isotropic hardening using a modified von Mises criteria with different properties in tension and compression, includes a backward Euler stress update algorithm with consistent tangent
Concrete models with opening and closing cracks and strain softening based on fracture energy in 2D and 3D
Concrete creep and shrinkage model to CEB-FIP Model Code 1990
Concrete heat of hydration modelling
Multi-surface cracking concrete with crushing material model
Viscous damped joints
Geotechnical model using Mohr Coulomb criteria including non-associative flow for soils and rocks
Volumetric deformation model for soils and crushable foams
Ogden and Mooney-Rivlin models for rubber materials with very large strains
Composite lay-ups for shell and solid nonlinear material models
Temperature dependency for all nonlinear material models
Creep model with time dependency and strain hardening
Viscoelasticity
Phase changes
User defined nonlinear material and creep interfaces
Damage model
Hashin material model for composite materials
Material model interface (MMI)
(9) Eigen Analysis
Lanczos and Subspace EigenSolver
Frequency bracketing
Euler buckling analysis
Guyan reduction with automatic or user defined masters
(10) Nonlinear Analysis
Incremental solutions with iterative correction
User defined combination of full or modified Newton Raphson iterations with line searches
Automatic arc length solution procedures with option for non-proportional loading
Automatic recovery upon convergence failure
Load or displacement control
Wide selection of convergence criteria
Large deformation, large rotation geometric nonlinearities
Large strains
Follower loads
Element birth and death facility
Centripetal stress stiffening
Temperature dependent material properties
(11) Dynamic Analysis
Forced response analysis
Modal (viscous or structural) or Rayleigh damping
Response spectrum analysis with a choice of SRSS and CQC spectral combinations
Modal synthesis analysis using superelements
Implicit transient dynamic analysis using Hilber-Hughes-Taylor time integration scheme
Explicit transient dynamic analysis using central difference time integration scheme
Initial velocity/acceleration input
Implicit and explicit impact
Linear and nonlinear dynamic analysis
Automatic time step selection
Time dependent material properties
Time dependent loading
Interactive Model Dynamics option for multiple loading events and advanced loading options
(12) Thermal Analysis
Steady state heat conduction/convection/radiation
Transient thermal analysis with a general two point recurrence scheme
Temperature dependent thermal properties
Temperature dependent nonlinear heat conduction/convection/radiation
Variable time step selection
Conduction/convection/gap radiation
Diffuse radiation using view factor with option to account for symmetry boundary conditions
Full and semi thermal-structural coupling
(13) Boundary Conditions
Choice of restrained, prescribed or spring boundary conditions
Transformed freedom option for skew boundary conditions
Time dependent boundary conditions and loading
Nonlinear friction and gap models to represent deformation dependent boundary conditions and contact problems
Slideline/slidesurface contact algorithms for use with implicit/explicit plane stress/strain, Axisymmetric, shell and solid elements
Convection and nonlinear radiation boundary conditions
Tied slidelines to connect incompatible meshes
Contact cushioning
Automatic pre-contact algorithm
Curved surface contact