scholarly journals An Effective Tsunami Damage Estimation Method Considering Dike Height

2007 ◽  
Vol 54 ◽  
pp. 261-265
Author(s):  
Fuminori KATO ◽  
Masaya FUKUHAMA ◽  
Hiroyuki FUJII ◽  
Toshimitsu TAKAGI ◽  
Toshio KODAMA
Keyword(s):  
Estimation Method ◽  
Damage Estimation ◽  
Tsunami Damage

Spectral analysis of sine-sweep vibration: A fatigue damage estimation method

2021 ◽  
Vol 157 ◽  
pp. 107698
Author(s):  
M. Palmieri ◽  
F. Cianetti ◽  
G. Zucca ◽  
G. Morettini ◽  
C. Braccesi
Keyword(s):  
Spectral Analysis ◽  
Fatigue Damage ◽  
Estimation Method ◽  
Damage Estimation ◽  
Sine Sweep

An adaptive learning damage estimation method for structural health monitoring

2014 ◽  
Vol 26 (2) ◽  
pp. 125-143 ◽  
Author(s):  
Debejyo Chakraborty ◽  
Narayan Kovvali ◽  
Antonia Papandreou-Suppappola ◽  
Aditi Chattopadhyay
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Adaptive Learning ◽  
Estimation Method ◽  
Damage Estimation ◽  
Structural Health

Analytical Method of Fatigue Damage Estimation for Compressor Stator Blades of Gas Turbines Experiencing Rotating Stall

2002 ◽  
Author(s):  
Yasushi Hayasaka ◽  
Shigeo Sakurai ◽  
Takeshi Kudo ◽  
Kunihiro Ichikawa
Keyword(s):  
Stress Analysis ◽  
Fatigue Damage ◽  
Analytical Method ◽  
Gas Turbines ◽  
Estimation Method ◽  
Rotating Stall ◽  
Environmental Data ◽  
Response Analysis ◽  
Damage Estimation ◽  
Stress Peak

To improve the reliability of compressor stator blades of gas turbines, an analytical method for estimating their fatigue damage has been developed. This method is based on blade-vibratory-stress analysis, stress-peak counting, and use of actual environmental data. The blade-vibratory-stress analysis takes the superposition of multi-peaks of the stress spectrum into account. The numerically simulated stress showed better agreement with measured stress than that from a conventional stress analysis, which is based on frequency-response analysis considering a single peak of the lowest single eigen-vibration-mode. A time-domain stress history was synthesized from the blade-vibratory-stress analysis results. Furthermore, the fatigue damage of the blade under rotating stall was estimated by the linear-damage-rule from the stress-peak counting of the stress and from material data. The estimated fatigue-damage agrees well with the measured results. This agreement means that our new fatigue-damage-estimation method is more accurate than the conventional one.

Developing Fragility Functions for Tsunami Damage Estimation Using Numerical Model and Post-Tsunami Data from Banda Aceh, Indonesia

2009 ◽  
Vol 51 (3) ◽  
pp. 243-273 ◽  
Author(s):  
Shunichi Koshimura ◽  
Takayuki Oie ◽  
Hideaki Yanagisawa ◽  
Fumihiko Imamura
Keyword(s):  
Numerical Model ◽  
Fragility Functions ◽  
Damage Estimation ◽  
Tsunami Damage ◽  
Banda Aceh

A Damage Estimation Method for Packaging Systems Based on Power Spectrum Densities Using Spectral Moments

2016 ◽  
Vol 29 (6) ◽  
pp. 303-321 ◽  
Author(s):  
Victor Huart ◽  
Jean-baptiste Nolot ◽  
Jean-Charles Candore ◽  
Jérôme Pellot ◽  
Nicolas Krajka ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Estimation Method ◽  
Damage Estimation ◽  
Spectral Moments

scholarly journals Tsunami damage estimation in Esmeraldas, Ecuador using fragility functions

2021 ◽  
Vol 7 (4) ◽  
pp. 669-694
Author(s):  
Teresa Vera San Martín ◽  
◽  
Leonardo Gutierrez ◽  
Mario Palacios ◽  
Erick Mas ◽  
...  
Keyword(s):  
Rake Angle ◽  
Fragility Functions ◽  
Damage Estimation ◽  
Coastal Zones ◽  
National Budget ◽  
Tsunami Damage ◽  
Fault Parameters ◽  
Tsunami Risk ◽  
Source Models ◽  
Dip Angle

<abstract> <p>The current study investigated the probable impact from a tsunami to a populated area located along the northwest ecuadorian coast, specifically in the key oil-industrial city of esmeraldas. a numerical tsunami simulation was performed considering the seismological and tectonic aspects of the area. The damage probability was calculated using fragility functions (ffs). Briefly, 16 cases of source models with slightly different fault parameters were tested, where one was selected as the worst scenario of tsunami inundation. This scenario was a hypothetic earthquake case (mw 8.7) located in front of esmeraldas city, approximately 100 km offshore along the ecuador—colombia trench, with three shallow fault segments (top depth of 10 km), a strike aligned with the trench axis, a middle dip angle of 28°, assuming large slips of 5 to 15 m, and a rake angle of 90°. The results from the numerical simulation were comparable to a similar study previously conducted and with those of historically documented data. The tsunami damage estimation using FFs resulted in estimated damages of 50% and 44% in exposed buildings and population, respectively. Results also showed that the most impacted areas were located next to the coastal shoreline and river. tourism, oil exports, and port activities, in general, would be affected in this scenario; thus, compromising important industries that support the national budget. Results from this study would assist in designing or improving tsunami risk reduction strategies, disaster management, use of coastal zones, and planning better policies.</p> </abstract>

Development and Validation of a Tsunami Numerical Model with the Polygonally Nested Grid System and its MPI-Parallelization for Real-Time Tsunami Inundation Forecast on a Regional Scale

2019 ◽  
Vol 14 (3) ◽  
pp. 416-434 ◽  
Author(s):  
Takuya Inoue ◽  
Takashi Abe ◽  
Shunichi Koshimura ◽  
Akihiro Musa ◽  
Yoichi Murashima ◽  
...  
Keyword(s):  
Numerical Model ◽  
Real Time ◽  
Regional Scale ◽  
Tsunami Hazard ◽  
Grid System ◽  
Damage Estimation ◽  
Tsunami Inundation ◽  
Computational Performance ◽  
Tsunami Damage ◽  
Rti Model

We have developed a new numerical model suitable for rapid and wide-area estimation of tsunami inundation and damage. The model is based on the world-renowned TUNAMI code solving the two-dimensional nonlinear shallow water equations, and enables one-stop simulation of the initial tsunami distribution based on a fault model, tsunami propagation and inundation, and damage estimation. It extends the configuration of the grid system from conventional rectangular regions to polygonal regions so that deployment of high-resolution grids can be confined to the coastal lowland, resulting in remarkably improved efficiency in computation and better precision. For the purpose of real-time implementation of tsunami inundation simulation using a high-performance computing infrastructure, vectorization and MPI parallelization have also been conducted. Moreover, the model was verified and validated through several benchmark problems that the National Tsunami Hazard Mitigation Program, organized by federal agencies and states in the U.S., developed as the quality standards for simulating and assessing tsunami hazard and risk. The newly-developed model is named “Real-time Tsunami inundation (RTi) model,” and its computational performance was examined using the SX-ACE, a vector supercomputer installed at Tohoku University. The results show that it requires only 128 cores of the SX-ACE for implementing six-hour tsunami inundation simulation with a 10-meter grid resolution within 10 minutes for the 700 km long coastline of Kochi Prefecture, Japan. This means that the RTi model is over 10 times more efficient as the conventional tsunami model with the rectangular domains, and it can be inferred that 2,451 cores of the SX-ACE are the overall computational resources needed for real-time tsunami inundation forecast on the whole coastal regions along the Nankai Trough subduction zone, corresponding to the computational performance of 170 Tflop/s. The resources required are equivalent to 24% of all the SX-ACE resources at Tohoku University, indicating the feasibility of real-time tsunami inundation forecast on a regional scale by using the RTi model. Since the Disaster Information System operated by the Cabinet Office of the Japanese Government adopted a function of tsunami damage estimation using the aforementioned numerical model, at the end of this paper, a brief overview of the subsystem for rapidly estimating tsunami damage on a regional scale is described.

Damage Estimation Method for Gas Turbine Hot Section Components Based on NDI Microstructure Analysis

2004 ◽  
Vol 2004 (0) ◽  
pp. 181-182
Author(s):  
Masataka NAGAE ◽  
Akihiro KANAYA ◽  
Kunihiro ICHIKAWA ◽  
Hiroyuki DOI ◽  
Shinya IMANO
Keyword(s):  
Gas Turbine ◽  
Estimation Method ◽  
Microstructure Analysis ◽  
Damage Estimation
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