김경종
50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
---
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type: concept
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title: "Midas Civil Numerical Analysis Model"
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created: 2026-06-02
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updated: 2026-06-02
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address: c-000159
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aliases:
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- MIDAS Civil numerical model
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- midas Civil analysis model
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tags:
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- concept
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- finite-element-method
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- midas-civil
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- modeling
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status: current
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related:
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- "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
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- "[[midas Civil]]"
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- "[[Finite Element Method]]"
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- "[[Finite Element Program Implementation]]"
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- "[[Finite Element Modeling and Convergence Checks]]"
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sources:
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- "[[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]"
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---
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# Midas Civil Numerical Analysis Model
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## Definition
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Midas Civil numerical analysis model is the structural model abstraction described in the [[Midas-Civil-Analysis-Reference|Midas Civil Analysis Reference]]: nodes locate the structure, finite elements convert members and continua into numerical data, and boundary conditions describe connection to adjacent bodies or supports.
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## How It Works
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The manual emphasizes three coordinate layers. Global coordinates define the model reference frame. Element coordinates define member or element-local quantities. Node local coordinates let users prescribe constraints, boundary springs, displacements, and reactions in arbitrary directions.
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The model is intentionally simplified from the real structure. The manual's practical warning is that simplification must stay inside the analysis purpose: element type, mesh idealization, member offsets, boundary assumptions, and local axes can strongly change the computed response.
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## Solver Development Notes
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- Input data should separate nodes, element connectivity, element type, material, stiffness/section data, and boundary/link definitions.
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- Coordinate transformations are first-class data, not postprocessing details.
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- A custom solver needs diagnostics for missing stiffness, inconsistent local axes, overconstraints, and boundary assumptions.
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- Verification should include model-equivalence checks: same physical bridge member modeled with different element or offset choices should be compared intentionally.
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## Connections
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- [[Finite Element Method]] supplies the general discretization logic.
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- [[Finite Element Program Implementation]] maps this model into assembly, solve, and recovery stages.
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- [[Finite Element Modeling and Convergence Checks]] captures the analyst-side reliability concern.
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