Model Test Research on Soil-Landslide Surge by River Channel Reservoir

2013 ◽  
Vol 353-356 ◽  
pp. 2610-2613
Author(s):  
Li Chen ◽  
Ping Yi Wang ◽  
Tao Yu ◽  
Fan Zhang ◽  
Yong Qiang Men
Keyword(s):  
Experimental Data ◽  
Influencing Factors ◽  
Model Test ◽  
Empirical Formula ◽  
Exchange Process ◽  
River Channel ◽  
Test Results ◽  
Generalized Model ◽  
Landslide Occurrence

By fully collected and surveyed on the soil landslide, with the help of generalized model, the experiment simulated the landslide occurrence and exchange process of soil landslide entered the water. Through the calculation and analysis of test results and influencing factors, it is given out the height of the initial surge, variation of the progressive surge and empirical formula of soil-landslide surge. Compared with experimental data, it is found that empirical formula has certain accuracy and it can provide a certain reference on surge disaster forecast.

scholarly journals Effect of Landslide Surge on Pile Foundation of Overhead Vertical Wharf

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Xiaolong Zhang ◽  
Junshuai Mu ◽  
Chengzhi Wang ◽  
Duoyin Wang
Keyword(s):  
Experimental Data ◽  
Influencing Factors ◽  
Structural Design ◽  
Empirical Formula ◽  
Pile Foundation ◽  
Extreme Values ◽  
Wave Pressure ◽  
Pressure Time ◽  
Great Harm ◽  
Good Agreement

Waves generated by landslides into water cause great harm to wharfs. Hence, the surge wave pressure generated by the landslide serves as an important reference for the structural design of wharfs in reservoir areas. In this study, a series of hydraulic model tests were performed to study the energy and wave pressure produced by the surge. According to wave pressure-time curves, the extreme values of sudden transient changes in wave pressure are obtained. The mechanism and influencing factors of surge wave pressure on vertical wharf buildings are expounded. On this basis, a formula to calculate the wave pressure exerted by landslide surge on the pile foundation of an overhead vertical wharf is developed. A large number of experiments show that the empirical formula is in good agreement with the experimental data.

Buckling of Unstiffened Shear Webs with Flanged Lightening Holes

1960 ◽  
Vol 64 (593) ◽  
pp. 298-299
Author(s):  
Maureen E. Michael
Keyword(s):  
Experimental Data ◽  
Empirical Formula ◽  
Test Results ◽  
Empirical Expressions ◽  
Satisfactory Method ◽  
Limited Series ◽  
General Mass ◽  
Semi Empirical

Although many investigators have set out to find a method of determining the buckling and failing stresses for unstiffened shear webs with flanged or unflanged lightening holes, it seems that so far no really satisfactory method has been found.A number of empirical and semi-empirical expressions have appeared over the years which agree closely with the limited series of tests on which they are based, but which the writer has found not to agree with the general mass of experimental data which is now available on this subject.Following a recent examination of the available data another attempt has been made to derive some expressions or formulae that would help the designer to estimate buckling and failing stresses of such panels, and as a first step a semi-empirical formula has been derived that appears to fit the test results reasonably well for the initial buckling case. It applies to panels with edges fixed.

Comments on Compressor Efficiency Scaling With Reynolds Number and Relative Roughness

1989 ◽  
Author(s):  
Terry Wright
Keyword(s):  
Experimental Data ◽  
Reynolds Number ◽  
Friction Factor ◽  
Model Test ◽  
Large Scale ◽  
Recent Literature ◽  
Test Results ◽  
Relative Roughness ◽  
Scaling Algorithms ◽  
Compressor Efficiency

The background and literature on scaling of model test results to predict the performance of large scale turbomachines are presented and discussed in the context of both industry restrictions and recent improvements in analytical rigor and accuracy of scaling algorithms. The variety and disparity of methods developed before about 1970 is illustrated and plausible explanation is offered to account for the broad differences. The more recent literature is considered and the older exponential algorithms for scaling are reconciled with the current methods based on friction factor correlations. A simpler form is developed in terms of either exponential or friction factor formulations which includes the influence of Reynolds Number, relative roughness and fixed, friction-independent losses. This method is compared to the recently developed algorithms and to experimental data taken from the literature.

Research on the Formula of Vibration Period of Multi-Ribbed Composite Slab Structure

2011 ◽  
Vol 217-218 ◽  
pp. 712-716
Author(s):  
Quan Yuan ◽  
Yuan Yuan Zhao ◽  
Hai Tao Liu
Keyword(s):  
Experimental Data ◽  
Regression Analysis ◽  
Seismic Performance ◽  
Empirical Formula ◽  
Test Results ◽  
Structural System ◽  
Fem Model ◽  
Vibration Period ◽  
Composite Slab

As a new structural system with a bright prospect, multi-ribbed composite slab structure has the advantages of ecological materials and seismic performance. In this paper, the formula of vibration period of multi-ribbed composite slab structure is discussed. Based on the analysis of FEM model and the regression analysis of experimental data, an empirical formula was put forward. It has been shown that the calculated results fit well with the test results.

scholarly journals Estimation of Maneuverability of Fishing Vessel Considering Hull-Form Characteristics

2021 ◽  
Vol 9 (6) ◽  
pp. 569
Author(s):  
Su-Hyung Kim ◽  
Chun-Ki Lee ◽  
Sang-Min Lee
Keyword(s):  
Model Test ◽  
Empirical Formula ◽  
Design Stage ◽  
Test Results ◽  
Fishing Vessel ◽  
Empirical Formulas ◽  
Estimation Errors ◽  
Hull Form ◽  
Fishing Vessels ◽  
Ship Maneuverability

Fishing vessels with a length (LBP) of less than 100 m are generally not required to comply with the mandatory IMO Ship Maneuverability Standards. Therefore, an analytical method using empirical formula is preferred rather than a model test, which consumes a lot of time and monetary resources in estimating the maneuverability at the design stage. However, most empirical formulas have been derived from the model test results of merchant ships, and in the process, estimation errors may occur when hull-form parameters (L/B or CbB/L) with high correlation are applied to fishing vessel hull form whose characteristics are different from those of merchant ships. Therefore, a modified empirical formula was derived from previous research by including major parameters of fishing vessel hull form in the Kijima 90 empirical formula. In this study, maneuverability of stern trawler hull form is estimated for validating a modified empirical formula. The study confirmed that including characteristic parameters of the fishing vessel hull form in the empirical formula developed for merchant ships could improve the accuracy of estimation.

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Iskendar Iskendar ◽  
Andi Jamaludin ◽  
Paulus Indiyono
Keyword(s):  
Comparative Study ◽  
Model Test ◽  
Hydrodynamic Model ◽  
Surface Effect ◽  
Center Of Gravity ◽  
Test Results ◽  
Flat Bottom ◽  
Towing Tank ◽  
Test Models ◽  
Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft  was fitted with  stephull  form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model  as a comparative study. The hydrodynamic  tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft  of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves.  Test results show that models  with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

Inclined Loading Capacity of Embedded Suction Anchors in Clay

2009 ◽  
Author(s):  
Y. S. Kim ◽  
K. O. Kim ◽  
Y. Cho ◽  
S. Bang ◽  
K. D. Jones
Keyword(s):  
Analytical Solution ◽  
Model Test ◽  
Inclination Angle ◽  
Load Application ◽  
Centrifuge Model Test ◽  
Loading Capacity ◽  
Test Results ◽  
Pullout Capacity ◽  
Centrifuge Model ◽  
Inclined Loading

An analytical solution has been developed to estimate the inclined pullout capacity of an embedded suction anchor in clay seafloor. Validation has been made through comparisons with a limited number of centrifuge model test results. Results indicate that the inclined pullout capacity of an embedded suction anchor in clay decreases as the load inclination angle to the horizontal increases. As the point of the load application moves downward, the inclined pullout capacity increases, reaches its peak, and then starts to decrease.

A Generalized Model for the Analysis of Groundwater Radiolysis

1984 ◽  
Vol 44 ◽  
Author(s):  
Stephen L. Nicolosi
Keyword(s):  
Experimental Data ◽  
Basis Set ◽  
Generalized Model

AbstractA generalized groundwater radiolysis model which is under development at Battelle-Columbus is described. This model uses a 55 reaction basis set for the radiolysis of the solvent. The basis set of reactions was chosen from the literature after comparing several descriptions against experimental data. This basis set has been augmented with 17 additional reactions to allow the description of the radiolysis of groundwater containing iron. The development of this mechanism is described, and comparisons with experimental data are shown.

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