An inverse approach for pressure load identification

2010 ◽  
Vol 37 (7) ◽  
pp. 865-877 ◽  
Author(s):  
Shaowen Xu ◽  
Xiaomin Deng ◽  
Vikrant Tiwari ◽  
Michael A. Sutton ◽  
William L. Fourney ◽  
...  
Keyword(s):  
Load Identification ◽  
Inverse Approach ◽  
Pressure Load

An Inverse Approach on Load Identification From Optimally Placed Accelerometers

2013 ◽  
Author(s):  
Deepak K. Gupta ◽  
Anoop K. Dhingra
Keyword(s):  
Natural Frequencies ◽  
Mode Shapes ◽  
Load Identification ◽  
Acceleration Response ◽  
Inverse Approach ◽  
Modal Damping ◽  
Modal Model ◽  
Load Transducer ◽  
Modal Coordinates ◽  
Selection Of

This paper presents an inverse approach for estimating dynamic loads acting on a structure from acceleration time response measured experimentally at finite number of optimally placed accelerometers on the structure. The structure acts as its own load transducer. The approach is based on the standard equilibrium equation of motion in modal coordinates. Modal model of a system is defined by its modal parameters — natural frequencies, corresponding mode shapes and modal damping factors. These parameters can be estimated experimentally from measured data, analytically for simple problems, or from finite element method. For measurement of the acceleration response, there can be a large number of combinations of locations on the structure where the accelerometers can be mounted and the results may be quite sensitive to the locations selected for accelerometer placements. In fact, the precision with which the applied loads are estimated from measured acceleration response depends on the number of accelerometers utilized and their location on the component. Implementation of a methodology to determine the optimum set of accelerometer locations, based on the construction of D-optimal design, is presented to guide the selection of number and locations of accelerometers that will provide the most precise load estimates. A technique based on model reduction is proposed to reconstruct the input forces accurately. A numerical validation that helps to understand the main characteristics of the proposed approach is also presented. The numerical results reveal the effectiveness and utility of the technique.

184 Tetrahydrobiopterin reverses pressure-load induced remodeling by recoupling of eNOS

2007 ◽  
Vol 6 (1) ◽  
pp. 43-43
Author(s):  
A MOENS ◽  
G TOCCHETTI ◽  
E TAKIMOTO ◽  
E KETNER ◽  
K CHAKIR ◽  
...  
Keyword(s):  
Pressure Load

System design using an inverse approach Application to the hybrid vehicle powertrain

2006 ◽  
Vol 40 (3) ◽  
pp. 269-290 ◽  
Author(s):  
Eric Bideaux ◽  
Jérôme Laffite ◽  
Wilfrid Marquis-Favre ◽  
Serge Scavarda ◽  
Franck Guillemard
Keyword(s):  
System Design ◽  
Hybrid Vehicle ◽  
Inverse Approach ◽  
Vehicle Powertrain

scholarly journals Research on Load Identification of Articulated Connector

2021 ◽  
Vol 1838 (1) ◽  
pp. 012071
Author(s):  
Zhongxiang Wang ◽  
Ning Zhu ◽  
Yi Yin ◽  
Maosheng He ◽  
Qiang Zhang
Keyword(s):  
Load Identification

scholarly journals Effect of the Gas Volume Fraction on the Pressure Load of the Multiphase Pump Blade

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 650
Author(s):  
Guangtai Shi ◽  
Dandan Yan ◽  
Xiaobing Liu ◽  
Yexiang Xiao ◽  
Zekui Shu
Keyword(s):  
Flow Rate ◽  
Static Pressure ◽  
Volume Fraction ◽  
Pump Impeller ◽  
Impeller Blade ◽  
Multiphase Pump ◽  
Pressure Load ◽  
Gas Volume Fraction ◽  
Power Capability ◽  
Gas Volume

The gas volume fraction (GVF) often changes from time to time in a multiphase pump, causing the power capability of the pump to be increasingly affected. In the purpose of revealing the pressure load characteristics of the multiphase pump impeller blade with the gas-liquid two-phase case, firstly, a numerical simulation which uses the SST k-ω turbulence model is verified with an experiment. Then, the computational fluid dynamics (CFD) software is employed to investigate the variation characteristics of static pressure and pressure load of the multiphase pump impeller blade under the diverse inlet gas volume fractions (IGVFs) and flow rates. The results show that the effect of IGVF on the head and hydraulic efficiency at a small flow rate is obviously less than that at design and large flow rates. The static pressure on the blade pressure side (PS) is scarcely affected by the IGVF. However, the IGVF has an evident effect on the static pressure on the impeller blade suction side (SS). Moreover, the pump power capability is descended by degrees as the IGVF increases, and it is also descended with the increase of the flow rate at the impeller inlet. Simultaneously, under the same IGVF, with the increase of the flow rate, the peak value of the pressure load begins to gradually move toward the outlet and its value from hub to shroud is increased. The research results have important theoretical significance for improving the power capability of the multiphase pump impeller.

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