Vibration Testing of a Solderless Electronic Module Manufactured by Additive Technique

The tubular heat exchangers described exhibited a sensitivity to flow-induced tube vibration at about 50% of their design shell-side flow. Following a detailed theoretical analysis, the heat exchangers were modified by the helical spacer method providing additional tube supports in-between the existing support plates and in the U-bend. This modification aimed at allowing the heat exchangers to operate safely and reliably at full load, including a 25% overload. Post modification sound and vibration testing was performed which confirmed the adequacy of the modification. The test results showed however, that at the overload condition, an unusual acoustic wave inside the shell was developing. It was determined that this wave would not be harmful to the safe operation of the heat exchangers. The paper will discuss the findings in more detail.

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Investigation on influence of Nitinol wire made tailored structure manufactured using MIG additive technique for machine tool operations

Materials Today Proceedings ◽

10.1016/j.matpr.2018.06.539 ◽

2018 ◽

Vol 5 (10) ◽

pp. 21350-21354

Author(s):

Priya Chouhan ◽

Shashwat Sharma ◽

Shreyas Gulhane ◽

I.A. Palani ◽

B.K. Lad

Keyword(s):

Machine Tool ◽

Nitinol Wire ◽

Additive Technique

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An Investigation of the Vibration Testing Method for Small Diameter Endmills

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.625.134 ◽

2014 ◽

Vol 625 ◽

pp. 134-139

Author(s):

Takenori Ono

Keyword(s):

Small Diameter ◽

Milling Process ◽

Modal Parameters ◽

Vibration Testing ◽

Function Generator ◽

Testing Method ◽

Milling Tool ◽

Compliance Curve ◽

Vibration Tests ◽

The Impact

This paper introduced about the in-process vibration testing method for small diameter endmill. By this method, the natural frequency and modal parameters such as mass, damping, and stiffness of the milling tool can be determined in the milling process. An oscillation of the vibrator is controlled by the function generator to apply the impact force at the appropriate cutting period. The measurement setup can determine the compliance curve by the measurement signals of the exiting force and tool deformation. To evaluate the feasibility of the new method, vibration tests were performed on a square endmill which has the diameter of 4 mm in the milling on brass material. Results of vibration tests show that modal parameters of the specific vibration mode can be determined by the new developed method.

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Finite element analysis and vibration testing of a three-dimensional crane structure

Measurement ◽

10.1016/j.measurement.2006.03.002 ◽

2006 ◽

Vol 39 (8) ◽

pp. 740-749 ◽

Cited By ~ 9

Author(s):

Jia-Jang Wu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Vibration Testing ◽

Element Analysis

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Vibration testing for anomaly detection

Mathematical Methods in the Applied Sciences ◽

10.1002/mma.1070 ◽

2009 ◽

Vol 32 (7) ◽

pp. 863-874 ◽

Cited By ~ 3

Author(s):

Habib Ammari ◽

Hyeonbae Kang ◽

Eunjoo Kim ◽

Hyundae Lee

Keyword(s):

Anomaly Detection ◽

Vibration Testing

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The identification of cortical microdamage in fatigue-loaded bone using a non-invasive impulse response vibration testing technique

Bone ◽

10.1016/8756-3282(92)90511-t ◽

1992 ◽

Vol 13 (5) ◽

pp. A14-A14

Author(s):

Terry S. Horn

Keyword(s):

Impulse Response ◽

Vibration Testing ◽

Testing Technique ◽

Non Invasive

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Vibration Measurement and Monitoring of a Rotating Disk Using Contactless Laser Excitation

Volume 3: Nonlinear Estimation and Control; Optimization and Optimal Control; Piezoelectric Actuation and Nanoscale Control; Robotics and Manipulators; Sensing; System Identification (Estimation for Automotive Applications, Modeling, Therapeutic Control in Bio-Systems); Variable Structure/Sliding-Mode Control; Vehicles and Human Robotics; Vehicle Dynamics and Control; Vehicle Path Planning and Collision Avoidance; Vibrational and Mechanical Systems; Wind Energy Systems and Control ◽

10.1115/dscc2013-3772 ◽

2013 ◽

Author(s):

Itsuro Kajiwara ◽

Naoki Hosoya

Keyword(s):

Laser Doppler Vibrometer ◽

Rotating Disk ◽

Disk Drive ◽

Vibration Characteristics ◽

Vibration Measurement ◽

Testing System ◽

Rotating Disks ◽

Vibration Testing ◽

Structural Surface ◽

Theoretical Analyses

This paper proposes a contactless vibration testing system for rotating disks based on an impulse response excited by a laser ablation. High power YAG pulse laser is used in this system for producing an ideal impulse force on structural surface without contact. The contactless vibration testing system is composed of a YAG laser, laser Doppler vibrometer and spectrum analyzer. This system makes it possible to measure vibration characteristics of structures under operation, such as vibration measurement of a rotating disk. The effectiveness of this system is confirmed by experimental and theoretical analyses. In this paper, a platter of hard disk drive is employed as an experimental object. Vibration characteristics of a rotating and non-rotating platter are measured and compared with the results of theoretical analysis.

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