김경종
75 lines
2.8 KiB
Markdown
75 lines
2.8 KiB
Markdown
---
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type: concept
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title: "Abaqus Inertial Rigid and Capacitance Elements"
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complexity: intermediate
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domain: computational-mechanics
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created: 2026-06-01
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updated: 2026-06-01
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address: c-000109
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aliases:
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- Abaqus point mass elements
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- Abaqus rotary inertia elements
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- Abaqus rigid elements
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- Abaqus heat capacitance elements
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tags:
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- concept
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- finite-element-method
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- abaqus
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- inertial-elements
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- rigid-elements
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status: current
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related:
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- "[[Abaqus-Analysis-User-s-Guide-Volume-IV|Abaqus Analysis User's Guide Volume IV]]"
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- "[[Abaqus Element Selection and Formulation]]"
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- "[[Direct Time Integration Methods]]"
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- "[[Abaqus Spatial Model Definition]]"
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- "[[Finite Element Heat Transfer and Field Problems]]"
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sources:
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- "[[Abaqus-Analysis-User-s-Guide-Volume-IV|Abaqus Analysis User's Guide Volume IV]]"
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source_refs:
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- source: "[[Abaqus-Analysis-User-s-Guide-Volume-IV|Abaqus Analysis User's Guide Volume IV]]"
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raw_path: ".raw/AbaqusAnalysisUserGuide4/"
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raw_files:
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- "AbaqusAnalysisUserGuide4_054.md"
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- "AbaqusAnalysisUserGuide4_053.md"
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- "AbaqusAnalysisUserGuide4_003.md"
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- "AbaqusAnalysisUserGuide4_032.md"
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md_indices:
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- 54
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- 53
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- 3
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- 32
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match: "heuristic-heading-keyword"
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confidence: high
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---
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# Abaqus Inertial Rigid and Capacitance Elements
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## Definition
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Abaqus inertial, rigid, and capacitance elements add concentrated mass, rotary inertia, rigid geometry, or point heat capacity without modeling a full deformable continuum.
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## How They Work
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Point mass and rotary inertia elements attach translational or rotational inertia to nodes. They are useful when the inertia of a component is important but its deformation is not being modeled explicitly.
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Rigid elements define rigid links, facets, or axisymmetric rigid geometry. They can participate in constraints, contact, or load transfer while avoiding deformable-element stiffness.
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Point capacitance elements add thermal storage to a node in heat-transfer workflows. They are the thermal analog of a concentrated capacity rather than a deformable structural element.
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## Why It Matters
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These elements are modeling shortcuts with physical consequences. They can make a model much cheaper and clearer, but they also concentrate inertia, stiffness, or heat capacity at specific nodes and must be tied to the surrounding model deliberately.
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## Connections
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- [[Direct Time Integration Methods]] is sensitive to concentrated mass and rotary inertia.
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- [[Abaqus Spatial Model Definition]] provides the node and element-set context for these discrete elements.
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- [[Finite Element Heat Transfer and Field Problems]] supplies the heat-capacitance use case.
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- [[Abaqus Element Selection and Formulation]] places these families in the broader element library.
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## Sources
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- [[Abaqus-Analysis-User-s-Guide-Volume-IV|Abaqus Analysis User's Guide Volume IV]]
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