Combination Analysis of Operational TPA and CAE Technique for Obtaining High Contributing Vibration Mode

Tanaka, Koki; Nakamoto, Rie; Fukasawa, Ken

doi:10.4271/2017-01-1856

Cited by 3 publications

(4 citation statements)

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“…In this study, we focused on the PC contribution as shown in Eq. 7to obtain important vibration behavior for the reduction of the response signal (Yoshida, 2016;Yoshida, 2017).…”

Section:     mentioning

confidence: 99%

“…In addition, each PC has orthogonality (no correlation) with the other PC by the PC analysis. From these background, PC mode is considered to have similar characteristics of the vibration mode excited at the operational condition and several previous studies focused the high contributing PC mode for extracting high contributing vibration mode to the vehicle interior noise (Yoshida, 2016;Yoshida, 2017).…”

Section: High Contributing Pc Modementioning

confidence: 99%

“…Operational TPA (OTPA) is one of the methods recently developed and the method calculates the contribution using only the sound and vibration signals at the operational condition (Noumura, 2006;Lohrmann, 2008;Klerk, D., 2010;Putner, 2012). Recently, modified OTPA method (OTPA with principal component model) has also been proposed for obtaining principal component (PC) contribution to the vehicle interior noise or vibration to grasp the important vibration behavior of the target structure for the effective countermeasure (Yoshida, 2016;Yoshida, 2017). However, if we apply the method to obtain high contributing vibration behavior in detail of a large structure such as a vehicle body, a lot of reference points have to be set at around the body on the contrary to the original OTPA.…”

Section: Introductionmentioning

confidence: 99%

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Obtaining method of high contributing whole body principal component mode by separated measurements

Majima

Isemura

2018

Mechanical Engineering Letters

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In this study, we developed a method for obtaining high contributing whole body vibration behavior to the vehicle interior noise at the running condition by modified operational TPA method (OTPA with PC model). The original OTPA with PC model requires measuring all reference and response points simultaneously. However, if the number of the point is so much, applying this method becomes hard. Hence, the proposed method was made to increase the applicability of this method by realizing to obtain the high contributing whole body vibration behavior without the simultaneous measurement of all points. In the method, several operational tests are repeatedly carried out in each measurement group and high contributing vibration behavior of each group to the response point (interior noise) was obtained as the high contributing partial PC mode. Subsequently, the high contributing whole body PC mode was obtained by integrating the partial PC modes. For obtaining it, relationship between each partial PC and the response point and original phase and amplitude compensation method were utilized. As the result, the high contributing whole body PC mode could be obtained well with much more less measurement points by comparing with the original OTPA with PC model and the applicability of the method was increased.

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“…In this study, we focused on the PC contribution as shown in Eq. 7to obtain important vibration behavior for the reduction of the response signal (Yoshida, 2016;Yoshida, 2017).…”

Section:     mentioning

confidence: 99%

Section: High Contributing Pc Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Obtaining method of high contributing whole body principal component mode by separated measurements

Majima

Isemura

2018

Mechanical Engineering Letters

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“…Transfer path analysis (TPA) has been proposed to obtain the contribution quantitatively and several methods were developed until now (Plunt, 1998;Noumura, 2006;Brandl, 2008;Lohrmann, 2008;Klerk, D., 2010;Putner, 2012). Operational TPA (OTPA) is one of the methods recently developed and enable us to obtain the contribution of each part (reference point) to the response point with small man-hour because the method calculates the contribution using only the sound and vibration signals at the operational condition (Noumura, 2006;Lohrmann, 2008;Klerk, D., 2010;Putner, 2012;Yoshida, 2016;Yoshida, 2017;Hirao, 2019). For applying the method, all reference and response point signals are necessary to be measured simultaneously since the method calculates the contribution from the relationship between reference and the response signals along time.…”

Section: Introductionmentioning

confidence: 99%

Operational transfer path analysis method using several measurement systems

Yamamoto

Nozuchi

2021

Mechanical Engineering Letters

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was better than the GPS linked system. However, we have to prepare special measurement systems equipped with optical cable connection. This also decrease applicability of OTPA. In this study, we then considered a post processing procedure to obtain accurate contribution of each reference point to the response point using several measurement systems without any special additional link system. Contribution calculation by OTPA using several measurement systems 2.1. OTPA calculation flowIn the original OTPA, the contribution of each reference point to the response point is obtained by multiplying each reference signal with the transfer function. The transfer function in this method is calculated using principal component regression method. The calculation procedure is shown in Fig. 1 (Noumura, 2006).

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Development of an Analytical Method for Rear Differential Gear Whine Noise Utilizing Principal Component Contribution by OTPA and CAE

Nakatsuka

Miwa

2019

SAE Technical Paper Series

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Combination Analysis of Operational TPA and CAE Technique for Obtaining High Contributing Vibration Mode

Cited by 3 publications

References 4 publications

Obtaining method of high contributing whole body principal component mode by separated measurements

Obtaining method of high contributing whole body principal component mode by separated measurements

Operational transfer path analysis method using several measurement systems

Development of an Analytical Method for Rear Differential Gear Whine Noise Utilizing Principal Component Contribution by OTPA and CAE

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