---
type: concept
title: "Midas NFX Analysis Workflow"
created: 2026-06-02
updated: 2026-06-02
address: c-000174
aliases:
  - NFX analysis workflow
tags:
  - concept
  - finite-element-method
  - midas-nfx
  - solver-workflow
status: current
related:
  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
  - "[[midas NFX]]"
  - "[[Finite Element Program Implementation]]"
  - "[[Finite Element Modeling and Convergence Checks]]"
  - "[[Midas NFX Element Library]]"
  - "[[Midas NFX Equation Solvers and Eigen Extraction]]"
sources:
  - "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
source_refs:
  - source: "[[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]"
    raw_path: ".raw/MidasNFXAnalysisManual/"
    raw_files:
      - "MidasNFXAnalysisManual_019.md"
    md_indices:
      - 19
    match: "heuristic-heading-keyword"
    confidence: low
---

# Midas NFX Analysis Workflow

## Definition

The NFX workflow is the production analysis loop described in the [[Midas-NFX-Analysis-Manual|Midas NFX Analysis Manual]]: define the finite element model, define the analysis case, solve, and inspect postprocessing results.

## Model Contract

The manual frames model definition around nodes, elements, mesh, loads, boundary conditions, analysis type, and result interpretation. It also makes the coordinate-system contract explicit: global coordinate systems, nodal displacement coordinate systems, element coordinate systems, material coordinate systems, element result coordinate systems, and element formulation coordinate systems can all be distinct.

## File Contract

The source identifies model files, solver input, run logs, text output, and binary postprocessing data. For a custom solver, that split is important because test harnesses need stable locations for model input, execution records, raw result files, and postprocessed quantities.

## Analysis Families

NFX covers linear static structural analysis, normal modes, linear buckling, direct/modal transient response, direct/modal frequency response, response spectrum, random response, nonlinear steady/transient heat transfer, nonlinear static, nonlinear quasi-static, nonlinear explicit transient, and nonlinear implicit transient analysis.

## Solver Development Use

This page is a requirements checklist for the outer application layer of a solver. Before implementing an element or constitutive model, the solver needs a concrete model schema, unit convention, coordinate-system policy, analysis-case type, input/output file contract, result-coordinate policy, and postprocessing result list.

## Connections

- [[Finite Element Program Implementation]] gives the generic implementation data flow.
- [[Midas FEA Analysis Workflow]] and [[Midas Civil Numerical Analysis Model]] are sibling MIDAS workflow references.
- [[Finite Element Modeling and Convergence Checks]] connects the workflow to model idealization and verification.