Mechanical shock
著者
書誌事項
Mechanical shock
（Mechanical vibration & shock / Christian Lalanne, v.2）
Penton, 2002
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注記
Includes bibliography and index.
内容説明・目次
内容説明
This volume considers the shock response spectrum, its various definitions, its properties and the assumptions involved in its calculation. In developing the practical application of these concepts, the shock shapes most often used with test facilities are presented, together with their characteristics and indications of how to establish test configurations comparable with those of the real, measured environment. There follows a demonstration of how to meet these specifications using standard laboratory equipment - shock machines, electrodynamic exciters driven by a time signal or a response spectrum - with discussion of the limitations, advantages and disadvantages of each method.
目次
- Chapter 1. Analysis of mechanical shocks Definitions
- Analysis in the time field
- Fourier transform Chapter 2. Shock response spectrum Basic principles
- Response of a linear system of one degree of freedom
- Definitions
- Standardized spectra of response: Difference between shock response spectrum (SRC) and extreme spectrum of response (SRE)
- Algorithms for calculation of shock response spectra
- Subroutine of calculation of shock response spectrum
- Choice of frequency of digitalization of signal
- Example of use of shock response spectra
- Use of shock response spectra for study of the systems to several degrees of freedom. Chapter 3. Properties of shock response spectra Principal zones of the shock response spectra
- Properties of shock response spectra at low frequencies. Properties of the shock response spectra at high frequencies
- Influence of damping
- Choice of damping
- Choice of field of frequency
- Charts
- Relation between response spectrum and Fourier shock spectrum
- Characteristics of shocks of pyrotechnic origin
- Precautions to be taken in calculation of spectra. Chapter 4. Development of shock specifications General
- Simplification of measured signal
- Use of shock response spectra
- Other methods
- Simulation of shocks on shaker, originating from spectrum. Chapter 5. Kinematics of simple shocks General
- Half-sine
- Near sine
- Rectangle: Sawtooth with final peak
- Sawtooth with initial peak. Chapter 6. Traditional shock machines Principal types
- Universal machine
- High impact machines
- Pneumatic machines
- Specific test facilities
- Programmers. Chapter 7. Realization of shocks on shaker Principle of the generation of a simple signal of form according to time
- Principal advantages of the realization of the shocks on dischargers
- Limitations of the electrodynamic dischargers
- Remarks on the use of electrohydraulic dischargers
- Pre-shocks and post-shocks
- Incidence of pre and post-shocks on the quality of simulation. Chapter 8. Simulation of shocks of pyrotechnic origin Simulation using pyrotechnics installation
- Simulation by metal - metal impact
- Simulation using electrodynamic shaker
- Simulation using traditional shock machines Chapter 9. Shock response spectrum control of shaker Principle of control using response spectrum
- Damped sinusoid
- D.LKern and C.D. Beam functions
- Zerd function
- Wavsin function
- Shock function
- Comparison of WAVSIN, SHOC and damped sine forms
- Use of quickly swept sine
- Problems encountered during synthesis of shocks
- Critique of control in spectrum
- Possible improvements
- Estimate of the feasibility of a shock specified by its SRC Appendix Similarity in mechanics **A1. Conservation of materials **A2. Conservation of acceleration and stress Principal notations - Bibliography - Index
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