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Course11210830861 lectures

Sound and Structural Vibration

Prof. Venkata R. Sonti · IISc Bangalore

Start with lecture 1 At NPTEL

Lectures

Week 1 Introduction to Waves

  1. Lecture 1: The longitudinal wave in vibrating spring Video
  2. Lecture 2: Harmonically excited systems Video
  3. Lecture 3: The concept of coincidence frequency Video
  4. Lecture 4: A classical problem in sound-structure interaction Video
  5. Lecture 5: Classical problem contd. Video

Week 2 The coupled roots and the physics

  1. Lecture 6: Uncoupled solution to the classical problem Video
  2. Lecture 7: Uncoupled solution continued. Video
  3. Lecture 8: Introduction to the coupled problem. Video
  4. Lecture 9: The coupled roots. Video
  5. Lecture10: Physical meaning of terms. Video

Week 3 The coupled sound and vibration field

  1. Lecture 11: Derivation of coupled roots using asymptotic method. Video
  2. Lecture 12: Coupled roots derivation continued Video
  3. Lecture 13: Regions of heavy and light fluid loading Video
  4. Lecture 14: Light and heavy fluid loading continued. Video
  5. Lecture 15: The coupled vibration field Video

Week 4 The 2-D structural-acoustic waveguide

  1. Lecture 16: The coupled acoustic field and stationary phase Video
  2. Lecture 17: The 2-D structural-acoustic waveguide Video
  3. Lecture 18: The coupled partial differential equations Video
  4. Lecture 19: Derivation of the coupled dispersion equation Video
  5. Lecture 20: A schematic of coupled waves Video

Week 5 Closed form derivations of coupled waves

  1. Lecture 21: Derivation of coupled waves using asymptotic method Video
  2. Lecture 22: Asymptotic method continued and Maple demo Video
  3. Lecture 23: Physics of the coupled waves Video
  4. Lecture 24: Critical points Video
  5. Lecture 25: Heavy fluid loading Video

Week 6 Vibrating rectangular plate backed by a cavity

  1. Lecture 26: Summary of the rectangular waveguide Video
  2. Lecture 27: Impedance and mobility. Video
  3. Lecture 28: Derivation of acoustic and vibration response Video
  4. Lecture 29: Derivation of vibro-acoustic response continued Video
  5. Lecture 30: Derivation of vibro-acoustic response continued Video

Week 7 Sound radiation from a rectangular plate set in a baffle.

  1. Lecture 31: Numerical example Video
  2. Lecture 32: Coupled resonance analysis using matrices Video
  3. Lecture 33: Coupled resonance analysis continued Video
  4. Lecture 34: Sound radiation from a baffled panel Video
  5. Lecture 35: Derivation of pressure response. Video

Week 8 Sound radiation from a baffled plate contd.

  1. Lecture 36: Radiation efficiency Video
  2. Lecture 37: Physics of volume velocity cancellation Video
  3. Lecture 38: Derivations in the frequency domain :1-D Video
  4. Lecture 39: Physics of the vibration spectrum in 2-D Video
  5. Lecture 40: Modal character across the frequency range Video

Week 9 Radiation resistance defined by Maidanik

  1. Lecture 41: Simultaneous radiation from several modes Video
  2. Lecture 42: Panel radiation model using monopoles Video
  3. Lecture 43: Physics of panel radiation using monopole model Video
  4. Lecture 44: Physics of panel radiation using monopole model, contd Video
  5. Lecture 45: Radiation resistance derivation from Maidanik’s work Video

Week 10 Transmission of sound through vibrating plates

  1. Lecture 46: Radiation resistance derivation from Maidanik’s work, contd. Video
  2. Lecture 47: Radiation resistance derivation from Maidanik’s work, contd Video
  3. Lecture 48: Modal average radiation efficiency Video
  4. Lecture 49: Modal average radiation efficiency contd Video
  5. Lecture 50: Transmission of sound through a rigid panel with flexible mounts Video

Week 11 Structural acoustics in cylindrical geometry

  1. Lecture 51: Frequency dependence of sound transmission Video
  2. Lecture 52: Sound transmission through a flexible partition Video
  3. Lecture 53: Transmission loss in different situations Video
  4. Lecture 54: Cylindrical shell vibration Video
  5. Lecture 55: Behavior of uncoupled shell waves Video

Week 12 Fluid loading phenomenon in structural acoustics

  1. Lecture 56: Fluid waves in rigid-walled cylindrical shells Video
  2. Lec57:Wave propagation characteristics in flexible cylindrical shells carrying fluid: Fuller’s paper Video
  3. Lecture 58: Wave impedance of an infinite plate: fluid loading Video
  4. Lecture 59: Fluid loading in a finite plate Video
  5. Lecture 60: Summary of the entire course. Video

Live Session

  1. Live Session 25-02-2022 Video

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IISc Bangalore
Department
Mechanical Engineering
Teacher
Prof. Venkata R. Sonti
Level
Undergraduate
Language
English
Subjects
Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
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