Vehicle Crash Mechanics
CRC Press, 19.06.2002 - 504 Seiten
Governed by strict regulations and the intricate balance of complex interactions among variables, the application of mechanics to vehicle crashworthiness is not a simple task. It demands a solid understanding of the fundamentals, careful analysis, and practical knowledge of the tools and techniques of that analysis.
Vehicle Crash Mechanics sets forth the basic principles of engineering mechanics and applies them to the issue of crashworthiness. The author studies the three primary elements of crashworthiness: vehicle, occupant, and restraint. He illustrates their dynamic interactions through analytical models, experimental methods, and test data from actual crash tests. Parallel development of the analysis of actual test results and the interpretation of mathematical models related to the test provides insight into the parameters and interactions that influence the results. Detailed case studies present real-world crash tests, accidents, and the effectiveness of air bag and crash sensing systems. Design analysis formulas and two- and three-dimensional charts help in visualizing the complex interactions of the design variables.
Vehicle crashworthiness is a complex, multifaceted area of study. Vehicle Crash Mechanics clarifies its complexities. The book builds a solid foundation and presents up-to-date techniques needed to meet the ultimate goal of crashworthiness analysis and experimentation: to satisfy and perhaps exceed the safety requirements mandated by law.
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2 CRASH PULSE CHARACTERIZATION
3 CRASH PULSE PREDICTION BY CONVOLUTION METHODS
4 BASICS OF IMPACT AND EXCITATION MODELING
5 RESPONSE PREDICTION BY NUMERICAL METHODS
6 IMPULSE MOMENTUM AND ENERGY
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acceleration accelerometer analysis angle approximation body mount Butterworth filter centroid chest deceleration chest g closed-form coefficient of restitution collision component computed crash pulse crash severity crash test crush energy curve damping factor deflection deformation derived displacement dynamic crush effective mass energy density equal equation equivalent square wave excitation filtered FIR coefficients fixed barrier force force-deflection formula frame frame vehicle frontal halfsine haversine hybrid model impact speed impact velocity inches input Kelvin model kinematic kinetic energy magnitude matrix maximum mid-size Mid-Size Car momentum mph Barrier mph rigid barrier natural frequency normalized occupant deceleration occupant response offset output parameters phase plot predicted Preload rebound relationship restraint slack restraint system ridedown efficiency rigid barrier test rollover Section shown in Eq shown in Fig sinusoidal spring and damper square wave subject vehicle TESW transfer function transient Truck F unbelted occupant unloading vehicle structure vehicle-to-vehicle velocity change zero