We work on the forefront of innovation with test-based techniques. VIBES facilitates the master degree course in Experimental Dynamics at the Delft University of Technology. Through in-house and joint research projects, we continuously expand our knowledge in the field of test-based techniques.

This page shows all the relevant published works of VIBES and VIBES’ employees. If you are interested in a joint research project, please get in touch.

Airborne transfer path analysis for an e-compressor

The goal of this paper is to provide a method for airborne source description of the EC and to determine the airborne sound contribution at the driver’s ear. The radiation of the EC was approximated by six acoustic monopoles emitting a volume acceleration. The characterization was conducted with the help of noise transfer functions (NTFs) and operational measurements in an anechoic chamber. Volume acceleration sources were used to measure the NTFs. The validation of the source identification was performed in a changed environment and a vehicle.

conference paper September 2020

Benchmark Study: The benefit of including rotational degrees of freedom in your source description

Before performing a transfer path analysis (TPA), the engineer needs to think about the right modeling of the source’s interface with the receiver. In practice, the vibration transfer from the source to the receiver is often modeled with three translational forces in each connection point. Mechanically this corresponds to a ball joint connection, which cannot transfer any moments. This study compares different complexities of interface descriptions on the industrial example of an electro-magnetic roll control (ERC) in a passenger car.

benchmark study September 2020

Experimental twelve degree of freedom rubber isolator models for use in substructuring assemblies

Hydraulic testing machines can be used to obtain frequency dependent dynamic stiffnesses of rubber isolators in translational degrees of freedom (DoF). Alternatively, dynamic substructuring based methods can be used. Results of two substructuring methods will be compared to those from a hydraulic machine.

case study March 2020

E-compressor airborne NVH Airborne sound predictions in vehicles with the help of component-based transfer path analysis

Due to the lack of masking noise from combustion engines in electric vehicles, the noise of auxiliary components is becoming a relevant topic. One of these components is the electric refrigerant compressor (ERC). This paper addresses the airborne sound transmission of the compressor, using the methods of component-based transfer path analysis (TPA).

case study November 2019

A Comparison of Two Source Characterisation Techniques Proposed for Standardisation

Currently two ISO standards are proposed for source characterisation. In this paper it is shown how the different approaches can be derived and compared using the general framework for Transfer Path Analysis (TPA).

SAE conference paper June 2019

A benchmark structure for validation of Experimental Substructuring, Transfer Path Analysis and Source Characterisation techniques

This paper presents a practical study on popular Experimental Dynamic Substructuring topics. A series of substructures is designed of such complexity to fit in right between “real life” structures and “academic” structures.

conference paper January 2017

A robust Transfer Path Analysis method for steering gear vibrations on a test bench

This paper presents a Transfer Path Analysis (TPA) method to predict the transmission of steering gear vibrations of BMW vehicles in a multi-kHz range. The blocked-force TPA concept is used.

conference paper January 2017

An indicator sensor criterion for in-situ characterisation of source vibrations

Component-based Transfer Path Analysis allows us to analyse and predict vibration propagation between an active source and passive receiver structures. The forces that characterise the active source are determined using sensors placed on the connected passive substructure.

conference paper January 2017

A Comparison of Two Component TPA Approaches for Steering Gear Noise Prediction

This paper presents a comparison of two component Transfer Path Analysis methods to predict the transmission of steering gear vibrations into the vehicle.

conference paper February 2015

General framework for transfer path analysis: History, theory and classification of techniques

Transfer Path Analysis (TPA) designates the family of test-based methodologies to study the transmission of mechanical vibrations. Since the first adaptation of electric network analogies in the field of mechanical engineering a century ago.

conference paper August 2015

Wikipedia page on Dynamic Substructuring

This page provides an accessible overview of Dynamic Structuring, the interface conditions required and the applications of Dynamic Substructuring in different domains.

Validation of Current State Frequency Based Substructuring Technology for the Characterisation of Steering Gear–Vehicle Interaction

This paper presents a validation study of several experimental Frequency Based Substructuring (FBS) techniques that were developed recently. Advances in the techniques up to 2009 were already applied and validated using the rear axle differential – vehicle interaction as a test case.

conference paper January 2014

An improved methodology for the virtual point transformation of measured frequency response functions in dynamic substructuring

Crucial in Dynamic Substructuring is the correct definition of the interfaces of the subsystems and the connectivity between them. Although this is straightforward practice for numerical finite element models, the experimental equivalent remains challenging.

conference paper June 2013

General Framework for Dynamic Substructuring: History, Review, and Classification of Techniques

In this paper a vision on substructuring methods is proposed, by recalling important historical milestones that allow us to understand substructuring as a domain decomposition concept.

conference paper May 2008 

Benchmark Study: The benefit of including rotational degrees of freedom in your source description

Before performing a transfer path analysis (TPA), the engineer needs to think about the right modeling of the source’s interface with the receiver. In practice, the vibration transfer from the source to the receiver is often modeled with three translational forces in each connection point. Mechanically this corresponds to a ball joint connection, which cannot transfer any moments. This study compares different complexities of interface descriptions on the industrial example of an electro-magnetic roll control (ERC) in a passenger car.

benchmark study September 2020

A benchmark structure for validation of Experimental Substructuring, Transfer Path Analysis and Source Characterisation techniques

This paper presents a practical study on popular Experimental Dynamic Substructuring topics. A series of substructures is designed of such complexity to fit in right between “real life” structures and “academic” structures.

conference paper January 2017

A robust Transfer Path Analysis method for steering gear vibrations on a test bench

This paper presents a Transfer Path Analysis (TPA) method to predict the transmission of steering gear vibrations of BMW vehicles in a multi-kHz range. The blocked-force TPA concept is used.

conference paper January 2017

Experimental twelve degree of freedom rubber isolator models for use in substructuring assemblies

Hydraulic testing machines can be used to obtain frequency dependent dynamic stiffnesses of rubber isolators in translational degrees of freedom (DoF). Alternatively, dynamic substructuring based methods can be used. Results of two substructuring methods will be compared to those from a hydraulic machine.

case study March 2020

A robust Transfer Path Analysis method for steering gear vibrations on a test bench

This paper presents a Transfer Path Analysis (TPA) method to predict the transmission of steering gear vibrations of BMW vehicles in a multi-kHz range. The blocked-force TPA concept is used.

conference paper January 2017

A Comparison of Two Component TPA Approaches for Steering Gear Noise Prediction

This paper presents a comparison of two component Transfer Path Analysis methods to predict the transmission of steering gear vibrations into the vehicle.

conference paper February 2015

General framework for transfer path analysis: History, theory and classification of techniques

Transfer Path Analysis (TPA) designates the family of test-based methodologies to study the transmission of mechanical vibrations. Since the first adaptation of electric network analogies in the field of mechanical engineering a century ago.

conference paper August 2015

Wikipedia page on Dynamic Substructuring

This page provides an accessible overview of Dynamic Structuring, the interface conditions required and the applications of Dynamic Substructuring in different domains.

Validation of Current State Frequency Based Substructuring Technology for the Characterisation of Steering Gear–Vehicle Interaction

This paper presents a validation study of several experimental Frequency Based Substructuring (FBS) techniques that were developed recently. Advances in the techniques up to 2009 were already applied and validated using the rear axle differential – vehicle interaction as a test case.

conference paper January 2014

An improved methodology for the virtual point transformation of measured frequency response functions in dynamic substructuring

Crucial in Dynamic Substructuring is the correct definition of the interfaces of the subsystems and the connectivity between them. Although this is straightforward practice for numerical finite element models, the experimental equivalent remains challenging.

conference paper June 2013

General Framework for Dynamic Substructuring: History, Review, and Classification of Techniques

In this paper a vision on substructuring methods is proposed, by recalling important historical milestones that allow us to understand substructuring as a domain decomposition concept.

conference paper May 2008 

Airborne transfer path analysis for an e-compressor

The goal of this paper is to provide a method for airborne source description of the EC and to determine the airborne sound contribution at the driver’s ear. The radiation of the EC was approximated by six acoustic monopoles emitting a volume acceleration. The characterization was conducted with the help of noise transfer functions (NTFs) and operational measurements in an anechoic chamber. Volume acceleration sources were used to measure the NTFs. The validation of the source identification was performed in a changed environment and a vehicle.

conference paper September 2020

E-compressor airborne NVH Airborne sound predictions in vehicles with the help of component-based transfer path analysis

Due to the lack of masking noise from combustion engines in electric vehicles, the noise of auxiliary components is becoming a relevant topic. One of these components is the electric refrigerant compressor (ERC). This paper addresses the airborne sound transmission of the compressor, using the methods of component-based transfer path analysis (TPA).

case study November 2019

An indicator sensor criterion for in-situ characterisation of source vibrations

Component-based Transfer Path Analysis allows us to analyse and predict vibration propagation between an active source and passive receiver structures. The forces that characterise the active source are determined using sensors placed on the connected passive substructure.

conference paper January 2017

Benchmark Study: The benefit of including rotational degrees of freedom in your source description

Before performing a transfer path analysis (TPA), the engineer needs to think about the right modeling of the source’s interface with the receiver. In practice, the vibration transfer from the source to the receiver is often modeled with three translational forces in each connection point. Mechanically this corresponds to a ball joint connection, which cannot transfer any moments. This study compares different complexities of interface descriptions on the industrial example of an electro-magnetic roll control (ERC) in a passenger car.

benchmark study September 2020

A benchmark structure for validation of Experimental Substructuring, Transfer Path Analysis and Source Characterisation techniques

This paper presents a practical study on popular Experimental Dynamic Substructuring topics. A series of substructures is designed of such complexity to fit in right between “real life” structures and “academic” structures.

conference paper January 2017