Rotating shaft vibration measuring systems

Minehunters are subjected to specific sea loads due to waving and dynamical impacts associated with underwater explosion. Sea waving can be sufficiently exactly modeled by means of statistical methods. Much more problems arise from modeling impacts due to underwater explosion. Knowledge of a character of impulse loading which affects ship shaft line can make it possible to identify potential failures by means of on-line vibration measuring systems. The problem of influence of sea mine explosion on hull structure is complex and belongs to more difficult issues of ship dynamics. Underwater explosion is meant as a violent upset of balance of a given system due to detonation of explosives in water environment. A paper presents a proposal of identification of a degree of hazard the ships hull forced from underwater explosion. A theoretical analysis was made of influence of changes of hull structure in vicinity of hull. The main problem of naval vessels is a lack of dynamical requirements of stiffness of the hull. Modeled signals and hull structure were recognized within sensitive symptoms of three sub models: model of hull structure, model of impact and model of propulsion system. All sub models allow testing forces and their responses in vibration spectrum using SIMULINK software and FEM models.

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Comparative study of selected bearing vibration measuring systems

Mechanik ◽

10.17814/mechanik.2018.7.64 ◽

2018 ◽

Vol 91 (7) ◽

pp. 498-500 ◽

Cited By ~ 1

Author(s):

Stanisław Adamczak ◽

Mateusz Wrzochal

Keyword(s):

Comparative Study ◽

Roller Bearing ◽

Rolling Bearing ◽

Vibration Monitoring ◽

Monitoring Systems ◽

Measuring Systems ◽

Bearing Vibration ◽

Vibration Measuring

Roller bearing manufacturers have individual bearing vibration monitoring systems, consisting of several key components. Despite the fact that the principle of operation of these systems is the same, they differ from each other with some constructional solutions, whereas the type of construction used has an impact on the accuracy of measuring vibrations of a rolling bearing.

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Basic Sound and Vibration Measuring Systems

Noise Control in Industry ◽

10.1201/9781482267150-8 ◽

1991 ◽

pp. 115-136

Keyword(s):

Measuring Systems ◽

Vibration Measuring

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DEVELOPMENT OF THE STRUCTURE OF LASER VIBRATION-MEASURING SYSTEMS WITH TWO OPTICALLY TREATED CHANNELS FOR NON-DESTRUCTIVE VIBRATION PARAMETERS

Spravochnik Inzhenernyi zhurnal ◽

10.14489/hb.2019.11.pp.040-045 ◽

2019 ◽

pp. 40-45

Author(s):

V. V. Matrosova

Keyword(s):

Measuring Systems ◽

Vibration Parameters ◽

Vibration Measuring ◽

Non Destructive

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МЕТРОЛОГИЧЕСКОЕ ОБЕСПЕЧЕНИЕ КАЛИБРОВКИ КАНАЛОВ КОНТРОЛЯ ВИБРАЦИИ В СОСТАВЕ РЕГУЛЯТОРА АВИАДВИГАТЕЛЯ

Aerospace technic and technology ◽

10.32620/aktt.2019.7.22 ◽

2019 ◽

pp. 151-156

Author(s):

Анна Григорьевна Буряченко

Keyword(s):

Vibration Frequency ◽

Primary Transducer ◽

Vibration Acceleration ◽

Measuring Systems ◽

Information Measuring ◽

Predetermined Level ◽

Normative Documentation ◽

Vibration Measuring ◽

Electric Signals

There are shown the normative documentation requirements concerning complete and element wise calibration of the information-measuring systems measuring channels. It is about requirements, which are applicable for tests area of aviation turbo-engines and their componentry, including the electronic regulators FADEC-type. There are given short information concerning the experience of JSC "Element" – certificated developer and manufacturer of such regulators – on providing of calibration (testing) of measuring channels with the use of imitators of electric signals of engine transducers. There is given the information concerning the ranges of measuring of vibrating accelerations and vibrating frequencies, which are required for providing of the engine vibrating monitoring and the information about the extreme high magnitudes of vibrating acceleration, which is interesting for the developer of the engine. There are covered the problems, which the developer of regulators deals with necessary to execute complete calibration of vibration measuring channels (jointly with a primary transducer), including the limitations laid on by the possibilities of accessible facilities of creation of vibration with the controlled magnitudes of vibration acceleration and vibration frequency in the required ranges of measuring. There are described the workplaces organized in JSC "Element" at the methodical help of SE "Ukrmetrteststandard" for providing of complete calibration of vibration measuring channels in laboratory terms at the enterprise-manufacturer, including the workplace with the resonator, which was specially developed and made. There are brought the results over of development, making and uses of the resonator, which provides controlled vibrations with the extreme level of vibration acceleration – 400 g and more at the predetermined level of vibration frequency.There is shown the expediency of element wise measuring channels calibration with the use of imitators of sensors signals for serial producing of regulators. There is explained the necessity to organize workplaces for the realization of complete calibration on enterprise-developer of FADEC regulators, which provide verification results got with imitators.

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COMPARISON OF GEOMETRICAL CHARACTERISTICS AGAINST ROTATING SHAFT VIBRATION

Jurnal Teknologi ◽

10.11113/jt.v82.13813 ◽

2020 ◽

Vol 82 (2) ◽

Author(s):

K. Jafri ◽

Rizauddin Ramli ◽

Abdul Hadi Azman

Keyword(s):

High Speed ◽

Rotating Shaft ◽

Rotating System ◽

Vibration Data ◽

Geometrical Characteristics ◽

Shaft Misalignment ◽

High Speed Rotation ◽

Speed Rotation ◽

Shaft Vibration ◽

The Impact

Geometrical dimensioning and tolerance (GD&T) are an important element of the industry that uses high-speed rotation. Poor geometrical tolerance (GT) to components will cause the rotor to become unbalanced. Unbalanced rotor and shaft misalignment are the two major sources of vibration in the rotating system. This paper compares geometrical characteristics (GCs) to investigate the effects of vibrations generated by different GCs. Only four GC shafts were compared, straightness, parallelism, cylindricity, and concentricity, referring to the GD&T standard as ASME Y14.5-2009. These four GCs were selected owing to their direct involvement in the rotating system. Specimens are constructed with parameters of the same dimensions, length, and GT values only differ from GCs. Specimens were measured using a digital gage to find the GT value near 3000 micron at 3 mm. The magnitude of the shaft vibration during rotation was recorded using a VA-12 vibration analyzer with different rotational speeds: 510, 770, and 900 rpm. From the vibration data, the GCs’ effect on the rotation shaft will be determined. GCs are found to have significant effects on the rotation of the shaft that should be considered in the design, installation, and maintenance of rotating shafts. The impact and degree of damage to critical parts of the system can serve as a benchmark for further studies for the optimization of tolerance values and for the maintenance of component performance.

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