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Structural Motion Control in MSC.NASTRAN
This book describes the theory of passive structural motion control, i.e. the control and reduction of vibratory dynamic structural motion by optimum stiffness and mass, isolation systems, optimum damping and tuned mass dampers.

Structural Motion Control in MSC.NASTRAN

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  • PDF document. 68 pages.

  • ACKNOWLEDGEMENTS. 3

    LIST OF SYMBOLS AND NOTATIONS. 4

    1.1    GL, ML Passive Structural Motion Control. 7

    1.1.1    Optimum Stiffness and Mass Distribution. 7

    1.1.1.1    Concepts of Forced Frequency Response of Deterministic Periodic Harmonic Load Excitations. 7

    1.1.1.2    Concepts of Forced Transient Response of Deterministic Load Excitations. 10

    1.1.1.3    Concepts of Forced Frequency Response of Deterministic Periodic Harmonic Base Excitations. 14

    1.1.1.4    Concepts of Forced Transient Response of Deterministic Base Excitations. 15

    1.1.1.5    Concepts of Forced Transient Response (Response Spectrum Analysis) of Random Non-Stationary Base Excitations. 16

    1.1.2    Optimum Damping Distribution. 17

    1.1.2.1    Elemental Damping Mathematical Models. 17

    1.1.2.2    Modal Damping Mathematical Models. 26

    1.1.2.3    Global Damping Mathematical Models. 29

    1.1.2.4    Damping Formulation Conclusions. 31

    1.1.3    GL, ML Base Isolation Systems. 32

    1.1.3.1    Controlling Displacement Response From Harmonic Load Excitations. 32

    1.1.3.2    Controlling Acceleration Response From Harmonic Load Excitations. 32

    1.1.3.3    Base Isolation - Controlling Displacement Response From Harmonic Base Enforced Motion. 33

    1.1.3.4    Base Isolation - Controlling Acceleration Response From Harmonic Base Enforced Motion. 34

    1.1.3.5    Base Isolation – Controlling Force Transmitted Into Foundation From Harmonic Load Excitations. 36

    1.1.4    GL, ML Tuned Mass Damper (TMD) Systems. 37

    1.1.4.1    Damped SDOF System Subject to Harmonic Force and Support Motion Excitations. 40

    1.1.4.2    Undamped Structure, Undamped TMD System Subject to Harmonic Force Excitation. 41

    1.1.4.3    Undamped Structure, Damped TMD System Subject to Harmonic Force Excitation. 43

    1.1.4.4    Undamped Structure, Damped TMD System Subject to Harmonic Support Motion. 49

    1.1.4.5    Damped Structure, Damped TMD System Subject to Harmonic Force and Support Motion. 51

    1.1.4.6    TMD Analysis Summary (Warburton, 1982) 53

    1.1.5    GL, ML Tuned Slosh Damper (TSD) Systems 55

    1.1.5.1    When To Employ TSDs. 55

    1.1.5.2    Operations of TSDs. 55

    1.1.5.3    Deep or Shallow Tank?. 63

    1.1.5.4    Testing. 64

    1.1.5.5    Miscellaneous Design Information. 65

    1.1.5.6    Design Procedure for Deep Tank TSDs. 66

    1.2    GL, ML Active Structural Motion Control – Control System Analysis. 67

    BIBLIOGRAPHY.. 68

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