File Name: vibration analysis and control .zip
- Mechanical Vibration Analysis Uncertainties and Control
- Vibration analysis and control in linear switched reluctance motor
- Vibration Analysis and Control of Locomotive System
- The Vibration Analysis Handbook Malestrom
Most machines and structures are required to operate with low levels of vibration as smooth running leads to reduced stresses and fatigue and little noise.
Mechanical Vibration Analysis Uncertainties and Control
Samuel, Robello , and Dongping Yao. In high-risk, high-cost environments, such as ultra-deep waters, refining advanced technologies for the successful completion of wells is paramount. Challenges are still very much associated with complex bottomhole assemblies BHAs and with the vibration of the drillstring when used with hole enlarging tools. These tools with complex profiles and designs become additional excitation sources of vibration. The more widespread use of downhole tools for both directional telemetry and logging-while-drilling LWD applications, as part of the front line data acquisition system within the drilling process, has made reliability a prime area of importance.
This paper presents and validates an existing model to predict severe damaging vibrations. It also provides analysis techniques and guidelines to successfully avoid the vibration damage to downhole tools and to their associated downhole assemblies when using hole enlarging tools, such as hole openers and underreamers.
The dynamic analysis model is based on forced frequency response FFR to solve for resonant frequencies. In addition, a mathematical formulation includes viscous, axial, torsional, and structural damping mechanisms.
With careful consideration of input parameters and the judicious analysis of results, we demonstrated that drillstring vibration can be avoided by determining the three-dimensional vibrational response at selected excitations that are likely to cause them. In addition, the analysis provides an estimate of relative bending stresses, shear forces, and lateral displacements for the assembly used.
Based on the study, severe vibrations causing potentially damaging operating conditions that had been a major problem in nearby wells were avoided. Simple guidelines are provided to estimate the operating range of the drilling parameter to mitigate and avoid the downhole tool failures. Extensive simulations were performed to compare the data from the downhole vibration sensors; this paper includes severe vibration incidence data from three case studies in which the model estimated, predicted, and avoided severe vibration.
Sign In or Register. Advanced Search. Sign In. Skip Nav Destination Proceeding Navigation. Close mobile search navigation. All Days. Previous Paper Next Paper. Article Navigation. This Site. Google Scholar. Dongping Yao Dongping Yao. Published: September 19 Abstract In high-risk, high-cost environments, such as ultra-deep waters, refining advanced technologies for the successful completion of wells is paramount.
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Vibration analysis and control in linear switched reluctance motor
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PDF | This book focuses on recent and innovative methods on vibration analysis, system identification, and diverse control design methods for both wind | Find.
Vibration Analysis and Control of Locomotive System
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From the natural world to the physical world, cycles are everywhere. We live our lives according to cycles as the days turn into weeks, the weeks into months, and the months into years. Cycles repeat at regular intervals and it is this repetitiveness that underlies the concept of vibration.
The Vibration Analysis Handbook Malestrom
Samuel, Robello , and Dongping Yao. In high-risk, high-cost environments, such as ultra-deep waters, refining advanced technologies for the successful completion of wells is paramount. Challenges are still very much associated with complex bottomhole assemblies BHAs and with the vibration of the drillstring when used with hole enlarging tools. These tools with complex profiles and designs become additional excitation sources of vibration. The more widespread use of downhole tools for both directional telemetry and logging-while-drilling LWD applications, as part of the front line data acquisition system within the drilling process, has made reliability a prime area of importance. This paper presents and validates an existing model to predict severe damaging vibrations.
Condition monitoring is the process of monitoring conditions in machinery such as vibration and temperature to look for signs that a fault may be developing. Condition monitoring is more efficient than reactive maintenance since faults can generally be avoided, thus reducing machine downtime, saving money and prolonging the life of the machine. Condition monitoring was carried out, at one time, by an experienced engineer holding a wooden stick against a piece of machinery and feeling the frequencies and harmonies of its vibrations. While this technique could reveal much about the condition of the machine, we are now lucky enough to live in the age of cyber technology and Advanced Maintenance Techniques AMTs. Use of the latest developments in computer analysis enables engineers to make better-informed judgements about the condition and future operation of machinery — either a stand-alone piece of equipment or as part of a multi-machine process. This allows engineers to better plan maintenance procedures, with only-when-necessary or just-in-time maintenance replacing old-style regular fixed-date monitoring.
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Problematic floor vibrations are typically caused by occupant activities walking and rhythmic excitation , poorly isolated building services, road and rail traffic, and construction activities piling, blasting, soil compaction. When not properly controlled, floor vibrations can limit the functionality of a space. Novus can help with floor design for:.
Vibration is an undesirable phenomenon of ground vehicles like locomotives and vibration control of vehicle suspension system is an active subject of research. The main aim of the present work is to modeling and analysis of locomotive system. The simplified equations for dynamical locomotive are firstly established.
Quick learning of graphic display. Detects abnormal symptoms from vibration characteristics or subtle change in vibration. Reduces risks of unplanned production shutdown by taking proactive approach. Advanced diagnostics realizes assumption of causes and areas of anomalies and detailed analysis. Help users practice optimum, efficient maintenance.
Когда она вошла, глаза немца чуть не вывалились из орбит. На ней была черная ночная рубашка; загорелая, орехового оттенка кожа светилась в мягком свете ночника, соски призывно выделялись под тонкой прозрачной тканью. - Komm doch hierher, - сказал немец сдавленным голосом, сбрасывая с себя пижаму и поворачиваясь на спину. Росио через силу улыбнулась и подошла к постели. Но, посмотрев на распростертую на простынях громадную тушу, почувствовала облегчение.
Но сегодня все было по-другому. Она поймала себя на мысли, что глаза ее смотрят в пустоту. Прижавшись лицом к стеклу, Мидж вдруг почувствовала страх - безотчетный, как в раннем детстве.
Похоже, фреон не достиг нижней части корпуса. Коммандер отпустил Сьюзан и повернулся к своему детищу стоимостью два миллиарда долларов. Глаза его расширились от ужаса.