김경종
76 lines
5.3 KiB
Markdown
76 lines
5.3 KiB
Markdown
---
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type: source
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title: "Midas NFX Analysis Manual"
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source_type: manual
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publisher: "[[MIDAS Information Technology]]"
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product: "[[midas NFX]]"
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created: 2026-06-02
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updated: 2026-06-02
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address: c-000172
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aliases:
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- MIDAS NFX Analysis Manual
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- midas NFX Analysis Manual
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tags:
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- source
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- finite-element-method
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- midas-nfx
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- analysis-manual
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- nonlinear-analysis
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status: current
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raw_path: ".raw/MidasNFXAnalysisManual/"
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source_files:
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markdown_files: 31
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markdown_bytes: 484727
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image_files: 766
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image_bytes: 11120504
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related:
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- "[[MIDAS Information Technology]]"
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- "[[midas NFX]]"
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- "[[midas FEA]]"
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- "[[midas Civil]]"
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- "[[Midas NFX Analysis Workflow]]"
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- "[[Midas NFX Element Library]]"
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- "[[Midas NFX Material and Composite Models]]"
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- "[[Midas NFX Equation Solvers and Eigen Extraction]]"
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- "[[Midas NFX Linear Dynamics and Buckling Analyses]]"
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- "[[Midas NFX Nonlinear Static and Dynamic Algorithms]]"
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- "[[Midas NFX Contact Analysis]]"
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- "[[Midas NFX Fatigue Analysis]]"
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- "[[Midas NFX Heat Transfer Joule Heating and Thermal Stress]]"
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- "[[Midas NFX Structural Optimization and Forming Limit Analysis]]"
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---
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# Midas NFX Analysis Manual
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## Scope
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This source is the analysis manual for [[midas NFX]], a general-purpose finite element analysis product from [[MIDAS Information Technology]]. The raw manual covers the analysis model, node degrees of freedom, coordinate systems, finite rotations, structural element formulations, material models, equation solvers, eigen extraction, dynamic response, nonlinear algorithms, contact, fatigue, optimization, forming-limit checks, and thermal/electrical field analysis.
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The manual is useful in this vault because it bridges the two existing MIDAS references. [[Midas-FEA-Analysis-Manual|Midas FEA Analysis Manual]] emphasizes civil nonlinear detail analysis, while [[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]] emphasizes bridge and civil workflows. The NFX manual is broader and more solver-kernel oriented: it names the structural analysis cases, describes file contracts, gives element and material coverage, and exposes algorithm choices such as sparse direct solution, AMG iteration, Lanczos extraction, HHT integration, explicit central difference, penalty contact, fatigue damage, and topology optimization.
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## Extracted Threads
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- [[Midas NFX Analysis Workflow]] - model definition, analysis case selection, solve, and postprocessing file/result contract.
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- [[Midas NFX Element Library]] - scalar, rod, bar, pipe, cable, membrane, shell, surface, plane strain, axisymmetric, solid, layered, thermal, electrical, rigid, interpolation, and joint elements.
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- [[Midas NFX Material and Composite Models]] - elastic, nonlinear elastic, plastic, hyperelastic, thermal, viscoelastic, laminated composite, and composite failure models.
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- [[Midas NFX Equation Solvers and Eigen Extraction]] - direct, multifrontal, out-of-core, GPU-assisted, AMG iterative, Lanczos, and matrix-direct eigen workflows.
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- [[Midas NFX Linear Dynamics and Buckling Analyses]] - modal, buckling, effective mass, mode superposition, transient, frequency response, random, and response spectrum procedures.
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- [[Midas NFX Nonlinear Static and Dynamic Algorithms]] - Newton iteration, line search, large-strain stress recovery, explicit/implicit transient integration, critical time step, damping, and mass scaling.
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- [[Midas NFX Contact Analysis]] - general, rough, welded, sliding, mortar, single-surface, node-to-surface, surface-to-surface, penalty, friction, and breaking-weld contact.
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- [[Midas NFX Fatigue Analysis]] - stress-life, strain-life, rainflow counting, Miner damage, mean-stress correction, and random vibration fatigue.
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- [[Midas NFX Heat Transfer Joule Heating and Thermal Stress]] - transient/steady heat transfer, thermal element matrices, Joule heating, electric potential coupling, and thermal-stress handoff.
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- [[Midas NFX Structural Optimization and Forming Limit Analysis]] - topology optimization, size optimization, DOE/surrogate models, SIMP/RAMP, OC/MMA, and forming-limit diagram methods.
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## Solver Development Value
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For custom solver development, this source is a production requirements checklist for a general-purpose FE kernel. It highlights contracts that must be nailed down before implementation: nodal DOF sets, local/global/material/result coordinate systems, element formulation coordinate systems, file formats, element result locations, solver selection logic, mode normalization, time-integration controls, contact enforcement, fatigue postprocessing, and optimization response definitions.
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## Connections
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- [[Finite Element Method]] supplies the common discretization frame.
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- [[Finite Element Program Implementation]] connects the manual's workflow to custom solver data structures and execution stages.
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- [[Static Equilibrium Equation Solvers]], [[Finite Element Eigenproblem Solvers]], and [[Direct Time Integration Methods]] connect to NFX solver algorithms.
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- [[Finite Element Contact Formulation]] connects to NFX penalty, search, mortar, and friction contact.
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- [[Finite Element Heat Transfer and Field Problems]] and [[Finite Element Thermal Stress Analysis]] connect to heat transfer, Joule heating, and temperature-load coupling.
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- [[Abaqus Structural Optimization and Parametric Studies]] provides a sibling commercial-solver optimization reference.
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