Modal test/analysis correlation for Centaur G Prime launch vehicle

1986 ◽  
Author(s):  
J. CHEN ◽  
T. ROSE ◽  
M. TRUBERT ◽  
B. WADA ◽  
F. SHAKER
Keyword(s):  
Launch Vehicle ◽  
Test Analysis ◽  
Modal Test

Modal test/analysis correlation of Space Station structures using nonlinear sensitivity

1992 ◽  
Author(s):  
VINEY GUPTA ◽  
JAMES NEWELL ◽  
LASZLO BERKE ◽  
SASAN ARMAND
Keyword(s):  
Space Station ◽  
Test Analysis ◽  
Modal Test

An effective method for damage assessment based on limited measured locations in skeletal structures

2020 ◽  
Vol 24 (1) ◽  
pp. 183-195 ◽  
Author(s):  
Parsa Ghannadi ◽  
Seyed Sina Kourehli
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Damage Detection ◽  
Degrees Of Freedom ◽  
Truss Structures ◽  
Mode Shapes ◽  
Analysis Model ◽  
Test Analysis ◽  
Modal Test ◽  
Artificial Neural

This article proposes a new damage detection method using Modal Test Analysis Model and artificial neural networks. A challenge in damage detection problems is lack of measured degrees of freedom, as well as limitations of attached sensors. Modal Test Analysis Model has been used in order to estimate unmeasured degrees of freedom. An experimental cantilever beam was used to show Modal Test Analysis Model’s efficiency in estimation of unmeasured mode shapes. To solve the inverse problem of damage detection, mode shapes estimated by Modal Test Analysis Model were used as inputs, and characteristics of the damage served as outputs of the artificial neural network. The sensitivity analysis carried out for each example showing the performance of artificial neural network after mode shape expansion was efficiently improved. Three numerical examples for plane and space truss structures are considered, in order to verify effectiveness of the proposed method. Results demonstrate a high accuracy of Modal Test Analysis Model and artificial neural network for structural damage detection.

Adjustments of Ground Motion Input Based on Ground Micro Tremor Test to Determine Ground Dynamic Characteristics and its Anisotropy

2011 ◽  
Vol 90-93 ◽  
pp. 1447-1453
Author(s):  
Jun Zuo
Keyword(s):  
Dynamic Response ◽  
Ground Motion ◽  
Structure Analysis ◽  
Dynamic Characteristics ◽  
Seismic Anisotropy ◽  
Time History ◽  
Test Analysis ◽  
Analysis Process

According to the seismic anisotropy theory and the test observation, this paper puts forward the conception of the ground micro tremor anisotropy, and researches the method of the micro tremor test analysis about the anisotropy of the ground dynamic characteristics. Given the anisotropic characteristics of the ground motion, it analyzes the influence of the ground motion anisotropy on the seismic dynamic response of the structure, and the existent problems about the selection and adjustment of the existing seismic time history in the structure analysis process. Finally, this paper puts forward the new selection and adjustment solution of ground motion input based on the ground micro tremor test to determine the ground dynamic characteristics and the ground anisotropy.

scholarly journals THE POLICY OF GRANTING COMPENSATION AND APPARATUS PERFORMANCE IMPROVEMENT

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Suharto Suharto ◽  
Suwignyo Widagdo ◽  
Yuniorita Indah Handayani
Keyword(s):  
Performance Improvement ◽  
Employee Performance ◽  
Hypothesis Test ◽  
Total Sample ◽  
Analysis Tool ◽  
Test Results ◽  
Test Analysis ◽  
Analysis Process ◽  
Environment Agency ◽  
Basic Salary

This study aims to determine the effect of compensation on employee performance, either partially or simultaneously. This research was conducted at Environment Agency of Bondowoso Regency with total sample of 100 employees. The analysis tool used is multiple linear regression with t test analysis tools and F test. The analysis process using SPSS statistical software. Hypothesis test results show that compensation consisting of basic salary, commission, incentive, structural allowance, overtime pay, social security, recognition and responsibility both partially and simultaneously affect the performance of employees. The contribution of variable compensation to employee performance is very dominant as evidenced by the coefficient of determinant 0.98%.

Correlation of the SPICE Beam Expander Structural Model With Component and System Level Modal Test Results

1993 ◽  
Author(s):  
Mark E. Mimovich
Keyword(s):  
Structural Model ◽  
Structural Parameters ◽  
System Level ◽  
Mode Shapes ◽  
Test Results ◽  
Modal Assurance Criterion ◽  
Test Analysis ◽  
Measurement Systems ◽  
Modal Test ◽  
Beam Expander

Abstract A full scale experimental beam expander structure is modeled and correlated with modal test results on a component and system level. Correlation of the FE models is completed using the LINK module of the Leuven Measurement Systems (LMS) software which is also used to acquire and reduce the modal test data. The correlation tools used to measure the agreement between test and analytic mode shapes are the Modal Assurance Criterion (MAC), Coordinate Modal Assurance Criterion (CoMAC), and mass cross-orthogonality. In addition to the tools used to measure agreement between test and analysis modal parameters, sensitivity and optimization algorithms are used to identity structural parameters which influence a particular mode and what the minimum change(s) must be in the parameter(s) to bring about the desired agreement. As part of a system level pre-test analysis, the theoretical mode shapes along with a normalized line-of-sight error associated with each mode are used to select the best measurement and excitation locations.

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