Numerical Transfer Path Analysis for NVH System-Simulation Models

Pasch, Gerwin; Jacobs, Georg; Berroth, Joerg

doi:10.1088/1757-899x/1097/1/012008

Cited by 3 publications

(1 citation statement)

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“…2,3 The precision and quality of the sealing strip can directly affect the NVH, service life, and appearance of automobiles. 4 In the early days of automobile manufacturing, manual pasting and template positive pressure pasting were adopted. 5 With the advancement of Industry 4.0, multi-sensor industrial robot technology was applied to the automatic sealing process, which is usually implemented in the form of rolling.…”

Section: Introductionmentioning

confidence: 99%

Door sealing mechanism and process in vehicle engineering

Tong

Xiu

Xiao-shan³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The reliability of door sealing plays an important role in maintaining the quality of vehicle noise, vibration, and harshness (NVH). To improve the reliability of door sealing, a novel sealing process has been proposed. The factors influencing the door sealing quality have been investigated. The relationships between the peeling force, peeling speed, and peeling time have been calculated using the five-variable rheological theory. The maximum stress versus time curve and the distribution of stress and strain at the moment of debonding have been obtained by nonlinear solid cohesive coupling dynamics simulation. The rolling process of the door sealing strip has been developed, and automatic rolling equipment for door sealing has been designed and manufactured. The factors influencing the peeling force have been determined by a peeling test of the door sealing strip. The results show that the peeling force increases with an increase in the peeling speed and time. The C-shaped structure at the front end of the base material during the stripping process makes the peeling angle sharp. In addition, the uneven stripping speed causes the stripping line to become irregular. The peeling force increases with the increase in rolling pressure and failure time. The optimum rolling pressure was 70 N/m2 and the optimum aging time was 24 h.

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Section: Introductionmentioning

confidence: 99%

Door sealing mechanism and process in vehicle engineering

Tong

Xiu

Xiao-shan³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Acoustic Optimization of a Power Take-off Gear Box Using Numerical Transfer Path Analysis

Wischmann

Pasch

Berroth

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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In this contribution, a method is proposed which allows for a target-oriented structural optimization of drive train systems using transfer path analysis on a multi body system simulation with respect to the airborne sound. It combines the existing approaches of multi body simulation (MBS) and experimental transfer path analysis (TPA) with sound radiation calculations thereby creating a new tool chain to not only identify critical operation points but also critical transfer paths of an MBS model. This approach combines the advantages of elastic MBS (i.e. information about modes and forces acting between different components in critical operating points) with the advantages of TPA (i.e. identifying critical paths from the excitation to the receiver) thereby enabling the designer to numerically deduct and evaluate target-oriented structural optimizations already in early stages of the development process. It therefore reduces development times and costs by reducing iteration loops and the manufacturing of physical prototypes. The method is demonstrated on a power take-off (PTO) gear box, of which the sound pressure level was reduced by 6 dB within three virtual optimization loops that each only take a few hours by applying the proposed method.

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