Dynamic response property of cooling tower structures

2015 ◽  
Keyword(s):  
Dynamic Response ◽  
Cooling Tower ◽  
Response Property

scholarly journals PDMS-Based Capacitive Pressure Sensor for Flexible Transparent Electronics

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Longlong Chen ◽  
Xin Chen ◽  
Zhihan Zhang ◽  
Tongkuai Li ◽  
Tingting Zhao ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Pressure Sensor ◽  
Annealing Temperature ◽  
Curing Temperature ◽  
Response Property ◽  
Capacitive Pressure Sensor ◽  
Pdms Film ◽  
Compression Property ◽  
Sensing Applications ◽  
Bending Radius

We propose a flexible pressure sensor based on polydimethylsiloxane (PDMS) and transparent electrodes. The transmittance of the total device is 82% and the minimum bending radius is 18 mm. Besides, the effect of annealing temperature on the mechanical properties of PDMS is reported here. The results show that the PDMS film under lower annealing temperature of 80°C has good compression property but poor dynamic response. While for higher temperatures, the compression property of PDMS films significantly reduced. The best compromise of annealing temperature between compression property and dynamic response is found for PDMS film of about 110°C. The pressure sensor under 110°C curing temperature shows a good sensitivity of 0.025 kPa−1 and robust response property. The device shows a promising route for future intelligent transparent sensing applications.

Hyperbolic Cooling Tower Dynamic Response to Wind

1978 ◽  
Vol 104 (1) ◽  
pp. 35-53
Author(s):  
Ray L. Steinmetz ◽  
David P. Billington ◽  
John F. Abel
Keyword(s):  
Dynamic Response ◽  
Cooling Tower ◽  
Hyperbolic Cooling Tower

Model Creation and Parameter Identification of Gun-Shoulder System

2011 ◽  
Vol 121-126 ◽  
pp. 960-963
Author(s):  
Jian Dong Bao ◽  
Chang Ming Wang
Keyword(s):  
Dynamic Response ◽  
Parameter Identification ◽  
Mechanical Impedance ◽  
Response Property ◽  
Characteristic Parameters ◽  
Model Parameter ◽  
Mechanics Model ◽  
Inherent Characteristic ◽  
Impedance Property

This paper analyzed mechanical admittance for contacting point between gun and shoulder; identified inherent characteristic parameters, established model of gun-shoulder system base on plentiful experiments. The results that can not only reflect mechanical impedance property of the shoulder, but also embody the equivalent dynamic response property of man-gun system. Then, making statistics analyses for different shooter, confirming receiving-shoulder’s model parameter of man-gun, providing academic base for building mechanics model of man-gun.

Cooling Tower Shell under Asynchronous Kinematic Excitation Using Concrete Damaged Plasticity Model

2013 ◽  
Vol 535-536 ◽  
pp. 469-472 ◽  
Author(s):  
Joanna M. Dulinska
Keyword(s):  
Dynamic Response ◽  
Cooling Tower ◽  
Classical Model ◽  
Plasticity Model ◽  
Inelastic Behavior ◽  
Irreversible Damage ◽  
Kinematic Excitation ◽  
Moderate Earthquake ◽  
Fracturing Process ◽  
Concrete Damaged Plasticity

The paper presents the analysis of the dynamic response of a cooling tower to moderate earthquake. To represent inelastic behavior of the concrete material of the tower under dynamic loading, the concrete damaged plasticity constitutive model was assumed. The model consists of the combination of non-associated multi-hardening plasticity and scalar damaged elasticity to describe the irreversible damage that occurs during the fracturing process. Two different models of seismic excitation were used. Initially, a classical model of uniform kinematic excitation was applied. In this model it was assumed that excitation at all supports was identical. Then, a model of non-uniform kinematic excitation, typical for large multiple-support structures, was introduced. In that model the wave passage along the foundation ring was taken into account. It occurred that the assumption of asynchronous excitation led to the increase of the dynamic response of the tower with respect to the assumption of uniform ground motion. The tensile damage (cracking) in some parts of the tower appeared and the stiffness of the concrete was degraded when non-uniformity of excitation was considered. This was due to the quasi-static effects resulting from changes of subsoil geometry during the shock. The analysis indicated that the classical assumption of uniform excitation may lead to non-conservative assessment of the dynamic response of the shell described with concrete damaged plasticity model.

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