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Time-dependent reliability methods for dynamic systems and linear random vibrations.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Time-dependent reliability methods for dynamic systems and linear random vibrations./
Author:	Majcher, Monica T.
Description:	1 online resource (220 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.
Contained By:	Dissertation Abstracts International78-02B(E).
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369235357

Time-dependent reliability methods for dynamic systems and linear random vibrations.
Majcher, Monica T.

Time-dependent reliability methods for dynamic systems and linear random vibrations. - 1 online resource (220 pages)

Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

Time-dependent reliability has recently become an important area of research in order to design products which perform their desired function dependably for their entire lifecycle. Without considering the degradation of reliability over time, many unexpected costs and failures may occur, incurring costly repairs, warranty costs and loss of market share. In this research, we introduce two new time-dependent reliability methods for dynamic as well as linear vibratory systems with random parameters and input random processes.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369235357Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Time-dependent reliability methods for dynamic systems and linear random vibrations.
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100 1 $a Majcher, Monica T. $3 1180337
245 1 0 $a Time-dependent reliability methods for dynamic systems and linear random vibrations.
264 0 $c 2016
300 $a 1 online resource (220 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Dissertation Abstracts International, Volume: 78-02(E), Section: B.
500 $a Adviser: Zissimos P. Mourelatos.
502 $a Thesis (Ph.D.) $c Oakland University $d 2016.
504 $a Includes bibliographical references
520 $a Time-dependent reliability has recently become an important area of research in order to design products which perform their desired function dependably for their entire lifecycle. Without considering the degradation of reliability over time, many unexpected costs and failures may occur, incurring costly repairs, warranty costs and loss of market share. In this research, we introduce two new time-dependent reliability methods for dynamic as well as linear vibratory systems with random parameters and input random processes.
520 $a The first method we introduced uses the concept of composite limit state to solve time-dependent (dynamic or vibratory) problems with limit-state functions of input random variables and input random processes. The input random processes are assumed Gaussian and are expressed in terms of standard normal variables using a spectral decomposition method. The total probability theorem is employed to calculate the time-dependent probability of failure using time-dependent conditional probabilities which are computed accurately and efficiently in the standard normal space using First Order Reliability Methods (FORM).
520 $a The second methodology calculates the failure rate of a linear vibratory system with random parameters excited by stationary or non-stationary Gaussian processes. The response of such a system is non-stationary because of the randomness of the input parameters. A space-filling design is first used to sample the input parameter space. For each design point, the corresponding conditional time-dependent probability of failure is calculated efficiently using random vibrations principles and an efficient numerical estimation of the up-crossing and joint up-crossing rates. A time-dependent metamodel is then created which allows us to estimate the conditional probabilities for any set of input parameters. The total probability theorem is finally applied to calculate the time-dependent probability of failure.
520 $a Principles from the developed time-dependent reliability methods are also applied to estimate fatigue reliability. All new methodologies are demonstrated using a hydrokinetic turbine blade design problem and vibratory beam examples. The fatigue reliability research has been demonstrated and validated using an experimental set-up in TARDEC's Physical Simulation Lab. All methodologies can be extended to systems with millions of degrees of freedom using a procedure described in the Future Work section.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Oakland University. $3 1180338
773 0 $t Dissertation Abstracts International $g 78-02B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10169339 $z click for full text (PQDT)