Vibration/Вибрация

Издание на английском языке
This book serves as a practical guide to the analysis and design of marine vessels, focusing on dynamic loads, vibrations, and acoustic phenomena such as propeller noise and cavitation. It covers in detail the theoretical foundations of vibrations, both continuous and discrete analysis, and the effects of various forces and exciters on the hull and equipment of a vessel. Particular attention is paid to methods for estimating natural frequencies, calculating hydrodynamic effects, and vibration analysis, which are essential for ensuring the durability and reliability of marine structures. The book provides recommendations on measurements, post-test adjustments, and practical approaches to improving system performance for specialists in shipbuilding, hydrodynamics, and marine engineering.

Content
An Introduction to the Series
Foreword
Preface
Acknowledgments
Author's Biography
Nomenclature
1. Introduction
1.1. General
1.2. Basic Definitions
2. Theory and Concepts
2.1. Continuous Analysis
2.1.1. Steady-State Response to Periodic Excitation
2.1.2. Undamped End-Forced Solution-Demonstrations
2.1.3. A More General Solution: Modal Expansion
2.1.3.1. Natural Frequencies and Mode Shapes
2.2. Discrete Analysis
2.2.1. Mathematical Models
2.2.2. Equations of Motion
2.2.3. Solutions
2.3. Propeller Exciting Forces
2.3.1. Propeller Bearing Forces
2.3.2. Propeller-Induced Hull Surface Pressures and Forces
2.4. Underwater Radiated Noise
2.4.1. Cavitation Dynamics as a Noise Source
2.4.2. Far-Field Sound Pressure
2.4.3. Far-Field Sound Intensity and Acoustic Power
2.4.4. Decibel Scaling
3. Alalysis and Design
3.1. Introduction
3.1.1. Basic Considerations
3.1.2. Recommended Design Approach
3.2. Approximate Evaluation of Hull Girder Natural Frequencies
3.3. Hydrodynamic Added Mass
3.4. Approximate Evaluation of Superstructure Natural Frequencies
3.5. Main Thrust Bearing Foundation Stiffness
3.6. Diesel Engine Excitation
3.7. Propeller Excitation
3.7.1. Hull Wake Characteristics
3.7.2. Approximate Selection of Propeller Blade Skew
3.7.3. Estimation of Propeller Bearing Forces
3.7.4. Estimation of Propeller-Induced Hull Surface Excitation
3.8. Propeller Cavitation Noise
3.8.1. Source Power
3.8.2. Sound Pressure
3.8.3. Other
4. Criteria, Measurements, and Posttrial Corrections
4.1. Criteria of Acceptable Vibration
4.2. Vibration Measurement
4.2.1. Design Verification
4.2.2. Posttrial Corrective Investigations
4.3. Posttrial Corrections
4.3.1. Hydrodynamic Modifications
4.3.2. Structural Modifications
4.3.3. Determination of Model Constants
4.3.4. Structural Modifications
4.3.5. A Propeller Change
References
Index