Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"Random Vibration"”.
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Durability analysis method for nonstationary random vibration
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Fatigue-based random vibration and acoustic test specification
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Optimization of the random vibration characteristics of vehicle suspensions
Thesis (Sc. D.)--Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1967.
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The inherent variation in fatigue damage resulting from random vibration
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1962.
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HARMONIC AND RANDOM VIBRATION DURABILITY INVESTIGATION FOR SAC305 (Sn3.0Ag0.5Cu) SOLDER JOINT
Vibration loading is commonly encountered during the service life of electronic products. However, compared to thermal cycling durability, vibration durability is more complex and has been less investigated. In surface mount technology, solder joints are the primary mechanical, thermal and …
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Cyclostationary Random Vibration of a Ship Propeller and a Road Vehicle
… the vortex theory of propeller. Considering the randomness in the axial and the tangential components of velocity, we calculate the mean and the covariance of the forces. This analysis shows that the hydrodynamic forces acting on the propeller are CS processes. Then we perform finite element …
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The First Passage Problem in Random Vibration for a Simple Hysteretic Oscillator
A method to determine the ordinary statistical moments of time to first passage and to determine the probability of first passage failure for a simple oscillator, incorporating the modified Bouc hysteresis model, has been developed. Two boundary value problems are formulated from Markov process …
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Non-stationary time-dependent ARMA random vibration modeling, analysis & SHM with wind turbine applications
… is the output-only identification of the vibration response of structures with time-dependent dynamics under uncertainty, and its application to the diagnosis of structural damage, referred to as vibration-based Structural Health Monitoring (SHM). This is of relevance to several classes of …
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First passage and other failure criteria in narrow-band random vibration: a discrete state approach.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1970. Ph.D.
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Using Reinforcement Learning and Bayesian Optimization on Problems in Vehicle Dynamics and Random Vibration Environmental Testing
… of the Matrix Power Control Algorithm (MPCA) for Random Vibration Control (RVC) testing, which is a particular type of environmental testing. A moving-average method was presented to reduce the control loop times and reduce the amplification of measurement noise. Additionally, Bayesian …
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Some Closure Problems in Stochastic Dynamics of Solids (Process, Random Vibration, Cumulant-Neglect, Crack Propagation, Earthquake)
In the studying of a nonlinear system under random excitation, it is usually difficult to determine the probability density of the system response. On the other hand, the equations for the statistical moments can be formulated rather easily, except that these equations form an infinite hierarchy …
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Random Vibration Analysis of Higher-Order Nonlinear Beams and Composite Plates with Applications of ARMA Models
In this work, the random vibration of higher-order nonlinear beams and composite plates subjected to stochastic loading is studied. The fourth-order nonlinear beam equation is examined to study the effect of rotary inertia and shear deformation on the root mean square values of displacement …
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Determination of the complex modulus of a solid propellant and random vibration analysis of the layered viscoelastic cylinders with finite element method
… highly sophisticated systems often subjected to random vibration environment. Thus, in various design, development, and production stages, laboratory random vibration testing of sampled solid rocket motors on electromagnetic or hydraulic shakers are routinely performed as an important …
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Stochastic Analysis of Seismic Safety Against Liquefaction
… during earthquakes is studied as a problem of random vibration of nonlinear-hysteretic systems. The random vibration results lead to the determination of the mean and standard deviation of the strong-motion duration of a random seismic loading with a given intensity that causes liquefaction. …
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Random Vibrations of Structures Under Parametric and Non-Parametric Earthquake Loads
… previously, especially from the point of view of random vibration. The secondary objective is to demonstrate the versatility of the mathematical theory of the Markov random process in structural dynamics applications.
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Seismic Damage Analysis and Damage-Limiting Design for R/c Structures (Earthquake, Building, Reliability, Design)
… model. Accordingly, a method of nonlinear random vibration technique was developed for obtaining the response statistics necessary for damage assessment.
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Seismic Damage Analysis and Design of Unreinforced Masonry Buildings
… cyclic load tests of masonry wall specimens. A random vibration method using a nonlinear hysteretic restoring force model to describe the load-deformation behavior of masonry was adopted to evaluate the response statistics required for damage assessment. The proposed damage model was calibrated …
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Effects of earthquakes on partially-filled water tanks
… derivation of the equations of motion for the vibration of the whole of tank by means of substructure synthesis, a stochastic analysis relating the random ground motion caused by earthquakes to the random vibration of the tank, a stochastic characterization of the fluid pressure and computation …
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