Analytical transmissibility based transfer path analysis for multi-energy-domain systems using bond graphs

2017 ◽  
Vol 24 (13) ◽  
pp. 2927-2937 ◽  
Author(s):  
Mohammad Jalali Mashayekhi ◽  
Kamran Behdinan
Keyword(s):  
Path Analysis ◽  
Vibration Isolation ◽  
Graph Model ◽  
Bond Graph ◽  
High Tech ◽  
Transfer Path ◽  
Energy Domain ◽  
Bond Graph Modeling ◽  
Transfer Path Analysis ◽  
Increasing Demand

The increasing demand for vibration reduction in several high-tech industries has motivated many researchers to investigate novel vibration isolation techniques. Understanding the vibration transfer paths within a system is an essential part of designing an effective vibration isolation strategy. In this paper, an analytical transfer path analysis algorithm is proposed suitable for multi-energy-domain systems. The bond graph modeling technique, which is an effective approach to model multi-energy-domain systems, is used to extend the concept of transmissibility to such systems. In this paper, an electro-hydro-mechanical system is used as a benchmark example to elucidate the effectiveness of the proposed technique. An energy based path ranking algorithm based on the bond graph model of the system is also conducted.

Bond Graph Model of a Multi-Layer Piezoelectric (PZT) Beam and Its Application in Semi-Active Hydraulic Mounts

2009 ◽  
Author(s):  
Nader Vahdati ◽  
Somayeh Heidari
Keyword(s):  
Vibration Isolation ◽  
Frequency Tuning ◽  
Vibration Reduction ◽  
Graph Model ◽  
Bond Graph ◽  
Noise And Vibration ◽  
Cabin Noise ◽  
Bond Graph Modeling ◽  
The Right ◽  
Noise And Vibration Reduction

Passive fluid mounts have been in use for the purpose of cabin noise and vibration reduction in the automotive and the aerospace industry. Cabin noise and vibration isolation is provided at a frequency coined “notch frequency”. To obtain the greatest cabin noise and vibration reduction at any desired frequency, the notch frequency needs to be close to that desired frequency. But, due to tolerances on all the fluid mount dimensions, and elastomer material properties, the notch frequency never ends up at the right location on the first manufacturing pass. To resolve notch frequency tuning cycle time, a new fluid mount design is proposed which consists of a conventional single-pumper fluid mount and a 3-layer piezoelectric cantilever beam resulting in a tunable notch frequency mount. Since this new design involves multi energy domains, bond graph modeling technique is used. This new design concept, its mathematical model and simulation results are presented.

Aero-Engine Vibration Propagation Analysis Using Bond Graph Transfer Path Analysis and Transmissibility Theory

2019 ◽  
Author(s):  
Seyed-Ehsan Mir-Haidari ◽  
Kamran Behdinan
Keyword(s):  
Path Analysis ◽  
Bond Graph ◽  
Design Guidelines ◽  
Aircraft Fuselage ◽  
Transfer Path ◽  
Engine Model ◽  
Development Costs ◽  
Aero Engine ◽  
Transfer Path Analysis ◽  
Aero Engines

Abstract In recent times, due to the increase in global energy commodities prices, aero-engine manufacturers are investing in advanced aero-engine technologies to reduce the operating costs. These innovative technologies include overall weight reductions to develop efficient aero-engines. Due to these circumstances, the overall exposure of the aero-engine to vibration transfer due to various loading conditions such as the rotor loading forces has significantly increased. Due to advancement in technologies and demand for greater passenger comfort, vibration transfer reduction to the aircraft fuselage has received prominent attention. In this paper, an analytical transmissibility study called the bond graph Transfer Path Analysis (TPA) has been extensively studied and its applications are explored. Bond Graph TPA is a reliable and feasible theoretical methodology that can be implemented on various large mechanical systems in the design stages to tackle noise and vibration problems before prototyping to significantly reduce the development costs. Bond graph transfer path analysis (TPA) is an advantageous method compared to the existing empirical TPA methodologies such as the Operational Path Analysis due to its efficient analytical nature. In this paper, bond graph TPA has been implemented on a reduced aero-engine model to determine vibration contribution at various aero-engine locations to propose structural design guidelines to minimize the vibration transfer.

scholarly journals Application of Vibrational Power Flow to a Passenger Car for Reduction of Interior Noise

2000 ◽  
Vol 7 (5) ◽  
pp. 277-285 ◽  
Author(s):  
S.K. Lee
Keyword(s):  
Path Analysis ◽  
Noise Level ◽  
Decomposition Method ◽  
Power Flow ◽  
Vibration Isolation ◽  
Passenger Car ◽  
Isolation System ◽  
Transfer Path ◽  
Transfer Path Analysis ◽  
Vibrational Power Flow

Reduction of structure-borne noise in the compartment of a car is an important task in automotive engineering. Transfer path analysis using the vibroacoustic reciprocity technique or multiple path decomposition method has generally been used for structure-borne noise path analysis. These methods are useful for solving a particular problem, but they do not quantify the effectiveness of vibration isolation of each isolator of a vehicle. To quantify the effectiveness of vibration isolation, vibrational power flow has been used for a simple isolation system or a laboratory-based isolation system. It is often difficult to apply the vibrational power flow technique to a complex isolation system like a car. In this paper, a simple equation is derived for calculation of the vibrational power flow of an isolation system with multiple isolators such as a car. It is successfully applied not only to quantifying the relative contributions of eighteen isolators, but also to reducing the structure-borne noise of a passenger car. According to the results, the main contributor of the eighteen isolators is the rear roll mount of an engine. The reduced structure-borne noise level is about 5dBA.

Vibration Transfer Path Analysis of Double-Layer Box for Marine Reducer

2021 ◽  
Author(s):  
Miaomiao Li ◽  
Qinwen Liu ◽  
Guanghao Dai ◽  
Weifang Chen ◽  
Rupeng Zhu
Keyword(s):  
Path Analysis ◽  
Double Layer ◽  
Transfer Path ◽  
Transfer Path Analysis
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