Magnetic modulator lifetime tests using the Sandia reliability test-bed

2003 ◽  
Author(s):  
K.W. Reed ◽  
L.X. Schneider ◽  
G.E. Pena ◽  
L.E. Martinez
Keyword(s):  
Reliability Test ◽  
Test Bed ◽  
Magnetic Modulator

scholarly journals Design and Research of Bearing Reliability Test Bed Based on Multi-Dimensional Vibration Loading

2021 ◽  
Vol 2101 (1) ◽  
pp. 012045
Author(s):  
Yanzhong Wang ◽  
E Shiyuan
Keyword(s):  
Test Chamber ◽  
Reliability Test ◽  
Test Bed ◽  
External Excitation ◽  
Rolling Bearings ◽  
Dynamic Reliability ◽  
External Vibration ◽  
Vibration Loading ◽  
Flexible Material ◽  
Vibration Excitation

Abstract Rolling bearings are widely used in aviation, aerospace and other important fields, and their reliability is greatly affected by external vibration excitation during service. Due to the large volume and high cost of the combined structure of shaking table and test chamber, this paper designed a dynamic reliability test bed specially for rolling bearings to study the influence of external vibration excitation with different directions, frequencies and amplitudes on vibration signals and service life of rolling bearings. The test bed is loaded with external excitation by means of electromagnetic shakers in two directions, and the flexible material is used to realize the displacement of the test chamber under two external excitation directions at the same time. The bearing vibration loading life test carried out by this test bed has important guiding significance for the design of rolling bearing. The experimental results show that the test bed can apply axial and radial vibration loads of 1-800Hz sinusoidal waveform, and the vibration acceleration can reach 1g, which can simulate the effect of actual working conditions.

Application with Theory of Vibration Equivalence on Reliability Test Bed of Train Brake System

2010 ◽  
Vol 34-35 ◽  
pp. 1978-1982 ◽  
Author(s):  
Xiao Yan Wang ◽  
Meng Ling Wu ◽  
Zhong Kai Chen
Keyword(s):  
Random Vibration ◽  
Brake System ◽  
Quantitative Relation ◽  
Reliability Test ◽  
Test Bed ◽  
Sinusoidal Vibration ◽  
Equivalency Theory ◽  
Environmental Vibration ◽  
Circular Frequency ◽  
Vibrating Table

In order to design a reliability test bed for train brake system, theory of vibration equivalence was used to represent in laboratory the environmental vibration. Firstly, the root mean square (RMS) value of the acceleration was calculated for train brake system according to IEC 61373. Then, a configuration of vibrostand was proposed for the reliability test bed, which was mainly composed of vibrating table-board, vibrator motor, damp and four vibrating springs, as shown in figure 2. After that, an equation was got according to the RMS equivalency theory. Finally, the equation was solved according to the feature of the vibrostand. And the quantitative relation was got for exciting force F0, shock excitation circular frequency ω and spring rate k. The method can also be used on other occasions where sinusoidal vibration is needed to replace random vibration.

Fatigue Life Analysis of Shaking Table’s Exciting Beam Based on Finite Element Analysis

2011 ◽  
Vol 421 ◽  
pp. 208-211
Author(s):  
Hai Bin Gong ◽  
Jian Su ◽  
Dong Lin Zhang ◽  
Li Wang ◽  
Xing Yu Wang
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Large Scale ◽  
Time History ◽  
Shaking Table ◽  
Reliability Test ◽  
Test Bed ◽  
Element Analysis ◽  
Exciting Beam ◽  
Fatigue Life Analysis

With large scale increases of the train speed, the development of one reliability test bed which can simulate vibration environment becomes the extremely urgent task. The shaking table is one of key reliability test equipments, and its design and development is in needs immediately. The fatigue strength is basic design index of shaking table. Based on the load time history acquired by track spectrum, combined with finite element model of exciting beam and material properties, the fatigue life of exciting beam is predicted by Miner cumulative damage rule method in this paper.

Study on Simulation Reliability Test of Machining Center

2010 ◽  
Vol 34-35 ◽  
pp. 360-364
Author(s):  
Xiang Po Zhang ◽  
Jian Zhong Shang ◽  
Zhuo Wang
Keyword(s):  
Quality Improvement ◽  
Reliability Test ◽  
Test Bed ◽  
Long Cycle ◽  
Machining Center ◽  
Mechanical Products

Reliability research on machining center has great significance for the quality improvement of the machining center and its mechanical products. The long cycle and insufficient accuracy of collecting data is the main problem of the current reliability research on machining center. By means of building a test-bed and simulating the environment and running conditions of live using in the specialized laboratory, the simulation reliability tests, accelerated and enhancement tests are carried out. This paper aims to solve the above mentioned limitations and offer a more effective method for reliability tests on machining center.

RELIABILITY TEST PLANS BASED ON EXPONENTIATED RAYLEIGH DISTRIBUTION

2018 ◽  
Vol 43 (1) ◽  
pp. 89-100
Author(s):  
B. SRIRAM ◽  
◽  
R.R.L. KANTAM ◽  
Keyword(s):  
Rayleigh Distribution ◽  
Reliability Test

Persepsi Dan Partisipasi Pengunjung Terhadap Permasalahan Sampah Laut (Marine Debris) Di Pantai Temberan Kabupaten Bangka Dan Pantai Pasir Padi Pangkalpinang

2020 ◽  
Vol 3 (1) ◽  
pp. 11-20
Author(s):  
Siska Oktavia ◽  
Wahyu Adi ◽  
Aditya Pamungkas
Keyword(s):  
Data Collection ◽  
Random Sampling ◽  
Sampling Technique ◽  
Marine Debris ◽  
Reliability Test ◽  
Validity Test ◽  
Data Collection Technique ◽  
Mixed Approach ◽  
Relationship Of ◽  
The Relationship

This study aims to analyze the value of the density of marine debris, perceptions and participation in Temberan beach and Pasir Padi beach, as well as determine the relationship of perception and participation to the density of marine debris. This research is a type of research that is descriptive with a mixed approach (quantitative and qualitative). The study was conducted at Temberan beach in Bangka Regency and Pasir Pasir Beach Pangkal Pinang in October 2019. The sampling technique used was random sampling and purposive sampling. The data collection technique was carried out using observation technique namely sampling and questionnaire. The validity test uses the Pearson Product Moment formula and the reliability test uses the Cronbach’s Alpha formula. The results showed that the density of debris in the Temberan beach was more dominant at 10.92 pieces/meter2, while at Temberan beach 3 pieces/meter2. The results of perception and participation are different, with the Temberan beach occupying more complex waste problems. The relationship of perception and participation in the density of marine debris have a relationship that affects each other.

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