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Mass
Sliding mass with inertia
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Description
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The Mass component models sliding mass with inertia and two rigidly connected flanges, without friction. The sliding mass has the length,  , and the position coordinate,  , is in the middle.
Sign convention: A positive force at ![flange[a]](/support/helpjp/helpview.aspx?si=3523/file08828/math24.png) moves the sliding mass in the positive direction. A negative force at ![flange[a]](/support/helpjp/helpview.aspx?si=3523/file08828/math26.png) moves the sliding mass to the negative direction. The component equations are
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Connections
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Name
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Description
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Modelica ID
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![flange[a]](/support/helpjp/helpview.aspx?si=3523/file08828/math73.png)
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Left driving flange. The flange axis is directed into the cut plane.
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flange_a
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![flange[b]](/support/helpjp/helpview.aspx?si=3523/file08828/math83.png)
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Right driven flange. The flange axis is directed out of the cut plane.
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flange_b
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Variables
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Symbol
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Units
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Description
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Modelica ID
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Acceleration of the component
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a
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s
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![s[a]](/support/helpjp/helpview.aspx?si=3523/file08828/math141.png)
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Position of ![flange[a]](/support/helpjp/helpview.aspx?si=3523/file08828/math148.png)
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flange_a.s
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![s[b]](/support/helpjp/helpview.aspx?si=3523/file08828/math155.png)
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Position of ![flange[b]](/support/helpjp/helpview.aspx?si=3523/file08828/math162.png)
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flange_b.s
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Velocity of the component
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v
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Parameters
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Symbol
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Default
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Units
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Description
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Modelica ID
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-
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Mass of the sliding mass
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m
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Length of the component from the left flange to the right flange
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L
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Initial Conditions
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Symbol
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Units
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Description
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Modelica ID
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![s[0]](/support/helpjp/helpview.aspx?si=3523/file08828/math262.png)
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Initial position of the sliding mass
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s_0
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![v[0]](/support/helpjp/helpview.aspx?si=3523/file08828/math275.png)
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Initial velocity of the sliding mass
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v_0
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Download Help Document
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