Fundamentals of vibroacoustical condition monitoring

2017

MATEC Web Conf.

Abstract. In the article author identifies a possible bone of mutual vibration energy measuring application used in the study of standard rail, as part of a dedicated research methodology and detailed methodologies developed in many previous author studies. Theoretical analysis and practical verification of susceptibility testing measurement information complex vibration processes indicates possibilities for their use. Recognizing the need to improve methods of machines and structures testing in order to assess their degradation state -this work presents important results of the research in the verification field of the proposed measures effectiveness of mutual research bench.

“…Measurement processes mutual indicate a change of source or variation in the transfer passageways signal extortion and answers. For these measures may include [1,7,13]:…”

Section: Mutual Measures Of Vibration Processmentioning

confidence: 99%

Mutual measures of vibration process in differentiating examined construction state

2017

MATEC Web Conf.

“…Therefore, it is assumed that, in practice, the system shown in Figure 2 may also be a model of [6,22]:…”

Section: Fig2 View Of the Crane As An Object Of The Modeled Systemmentioning

confidence: 99%

“…environmental forcing [6] The modeling also takes into account the fact that the received signal output anywhere in the design is a weighted sum of the answers to all elementary events φi (t,θ,r), always occurring in the same sequence at specific points on the pulse of the dynamic transfer function h(t,θ,r). These effects add up and are further transformed along different axes of reference, with the change of signal reception "r" is also connected with the change of the transmittance.…”

Section: Fig 4 Schematics Of the Characteristic Signal Transformatimentioning

confidence: 99%

“…Modal analysis is widely used in the study of damage caused by vibration, structural modification, update of the analytical model, control of the state and is also used to monitor vibration in aerospace structures and mechanics of civil engineering [6,15,17,22]. Often already used in various applications, modal analysis is a technique for the study of dynamic properties of some elements, using modal model parameters, consisting of modal frequencies, damping and vibration shapes [17,25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Truss Harbor Cranes Modal Design Elements Research

Liss

Polish Maritime Research

et al. 2015

“…Concept of energy dissipation was also used for identification of structural supporting layer of the foil bearing model [9]. Fundamentals of the concept of energy dissipation in the diagnosis are included in the works [10][11][12][13]. Concept of Energy dissipation was also used in [14] for measuring of vibration damping of shot-filled containers with some empty volume as the shot damper clearance.…”

Section: Introductionmentioning

confidence: 99%

Prediction of fatigue damage with the use of dissipation energy

Drożyner¹,

Szczyglak²

2017

Vib. proced.

Abstract. The paper refers to development of relationship between fatigue life and energy dissipated during process of fatigue. A theory about treating technical object as operational system, with limited potential for destruction was utilized. On the base of experiments, it was stated, that dissipated energy, which is stored in the object as a result of various kinds of wear processes, including fatigue can be such parameter. Amount of this energy was determined experimentally. It was found, that "consumption" of this energy depends on the value of the damping coefficient of the test object and the parameters of the oscillatory motion. Knowing the amount of this energy and accepting it as a "destruction capacity", it is possible to predict the fatigue life of an object under a given load.