NPTEL : NOC:Sound and Structural Vibration (Mechanical Engineering)

Co-ordinators : Prof. Venkata R. Sonti


Lecture 1 - The longitudinal wave in vibrating spring

Lecture 2 - Harmonically excited systems

Lecture 3 - The concept of coincidence frequency

Lecture 4 - A classical problem in sound-structure interaction

Lecture 5 - Classical problem (Continued...)

Lecture 6 - Uncoupled solution to the classical problem

Lecture 7 - Uncoupled solution (Continued...).

Lecture 8 - Introduction to the coupled problem.

Lecture 9 - The coupled roots

Lecture 10 - Physical meaning of terms

Lecture 11 - Derivation of coupled roots using asymptotic method

Lecture 12 - Coupled roots derivation (Continued...)

Lecture 13 - Regions of heavy and light fluid loading

Lecture 14 - Light and heavy fluid loading (Continued...)

Lecture 15 - The coupled vibration field

Lecture 16 - The coupled acoustic field and stationary phase

Lecture 17 - The 2-D structural-acoustic waveguide

Lecture 18 - The coupled partial differential equations

Lecture 19 - Derivation of the coupled dispersion equation

Lecture 20 - A schematic of coupled waves

Lecture 21 - Derivation of coupled waves using asymptotic method

Lecture 22 - Asymptotic method (Continued...) and Maple demo

Lecture 23 - Physics of the coupled waves

Lecture 24 - Critical points

Lecture 25 - Heavy fluid loading

Lecture 26 - Summary of the rectangular waveguide

Lecture 27 - Impedance and mobility

Lecture 28 - Derivation of acoustic and vibration response

Lecture 29 - Derivation of vibro-acoustic response (Continued...)

Lecture 30 - Derivation of vibro-acoustic response (Continued...)

Lecture 31 - Numerical example

Lecture 32 - Coupled resonance analysis using matrices

Lecture 33 - Coupled resonance analysis (Continued...)

Lecture 34 - Sound radiation from a baffled panel

Lecture 35 - Derivation of pressure response.

Lecture 36 - Radiation efficiency

Lecture 37 - Physics of volume velocity cancellation

Lecture 38 - Derivations in the frequency domain: 1-D

Lecture 39 - Physics of the vibration spectrum in 2-D

Lecture 40 - Modal character across the frequency range

Lecture 41 - Simultaneous radiation from several modes

Lecture 42 - Panel radiation model using monopoles

Lecture 43 - Physics of panel radiation using monopole model

Lecture 44 - Physics of panel radiation using monopole model (Cointinued...)

Lecture 45 - Radiation resistance derivation from Maidanik’s work (Continued...)

Lecture 46 - Radiation resistance derivation from Maidanik’s work (Continued...)

Lecture 47 - Radiation resistance derivation from Maidanik’s work (Continued...)

Lecture 48 - Modal average radiation efficiency

Lecture 49 - Modal average radiation efficiency (Cointinued...)

Lecture 50 - Transmission of sound through a rigid panel with flexible mounts

Lecture 51 - Frequency dependence of sound transmission

Lecture 52 - Sound transmission through a flexible partition

Lecture 53 - Transmission loss in different situations

Lecture 54 - Cylindrical shell vibration

Lecture 55 - Behavior of uncoupled shell waves

Lecture 56 - Fluid waves in rigid-walled cylindrical shells

Lecture 57 - Wave propagation characteristics in flexible cylindrical shells carrying fluid: Fullers paper

Lecture 58 - Wave impedance of an infinite plate: fluid loading

Lecture 59 - Fluid loading in a finite plate

Lecture 60 - Summary of the entire course