An analytical consideration on the striking probability and the total amount of strikes to simple structures according to standardized regulations

Hromčík, Martin; Hinrichsen, Volker; Hannig, Ronald; Brocke, Ralph

doi:10.1109/iclp.2014.6973339

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…One of the first promising sites is the landing field of the Frankfurt airport. Here one can fmd many highly elevated lighting masts with a height of 35 m each and distances between each other ranging from 75 m up to 150 m. With the help of a newly developed simulation, which is based on a dynamic electro-geometrical model, a specific arrangement on the airport was evaluated, considering each individual height, the distance between the lighting masts and the actual ground flash density [26]. In fig.…”

Section: H Locationfor the Measurementsmentioning

confidence: 99%

“…3. The values were calculated using a novel calculation method by means of a dynamic electro-geometrical model [26]. Several commitments for installations were given and a first installation will be made in fall 2014 near Frankfurt (Germany).…”

Section: Conceptual Implementationmentioning

confidence: 99%

“…Relationship between number of lightning rods and height and the outcome of attracted downward strikes[26] …”

mentioning

confidence: 99%

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Progress on the development of a measuring instrumentation for detection of pre-discharges on a lightning rod under the influence of a negative downward leader

Hromčík

Hinrichsen

Brocke³

2014

2014 International Conference on Lightning Protection (ICLP)

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Since its introduction in 1754 lightning protection has changed only a little. Under the influence of a negative downward leader pre-discharges develop on the tip of a lightning rod, and as a result an upward moving connecting leader is incepted. This leader may reach the downward leader and in consequence defines the point of strike of the lightning. To investigate the complex mechanisms, which comply with the inception of a successful connecting leader, laboratory tests, for example by the Renardieres-group, were conducted. It came to light that small pre-discharges would be responsible for the inception of real connecting leaders. This has led to new Lightning Protection Systems (LPS) concepts, which are claimed to have increased impact efficiencies. International standards (such as lEe 62305) describe the application of an effective LPS explicitly by avoiding these new concepts. Theoretical calculations and simulations in the laboratory have proven and disproven these new concepts.This contribution describes the progress and the assumptions of a measuring concept, which will be capable to measure pre discharges on veritable lightning rods under the influence of natural lightning leaders, as well as the first return stroke. The intention is to learn more about the process how pre-discharges are generated under the influence of lightning leaders.

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Section: H Locationfor the Measurementsmentioning

confidence: 99%

Section: Conceptual Implementationmentioning

confidence: 99%

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Progress on the development of a measuring instrumentation for detection of pre-discharges on a lightning rod under the influence of a negative downward leader

Hromčík

Hinrichsen

Brocke³

2014

2014 International Conference on Lightning Protection (ICLP)

Self Cite

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“…Also, the effective probability distribution resulting from the summation of 90% of the PDF for negative lightning and 10% for positive lightning is also plotted in comparison in Figure 2. From lightning observations over time, about 90% of all lightning strikes have negative polarity, and as such, the effective probability distribution will be applied in the numerical computation of the dynamic electro-geometrical model (Hannig et al, 2014).…”

Section: The Dynamic Electro-geometrical Model (Degm)mentioning

confidence: 99%

Advances in Raw Material Industries for Sustainable Development Goals

Litvinenko¹

2020

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Improving the computational accuracy of the dynamic electro-geometrical model using numerical solutions

Adekitan

2022

Sci Rep

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The dynamic electro-geometrical model has been applied in various studies to investigate the probability of a lightning strike to parts of a structure. The numerical computation of the dynamic electro-geometrical model (DEGM) follows an iterative step by determining lightning strike points from above to a point on a structure of interest. This computation is often time-consuming and requires extensive computational resources. This study delves into the inner workings of DEGM striking distance computation. It highlights sources of computational numerical errors, such as the effect of the discretisation size. It proposes ways to eliminate such by using a conversion factor while also significantly reducing computation time from more than 14 h to approximately 6 min for a cuboid structure by eliminating ground surface points. The performance of the proposed improved DEGM (IDEGM) was investigated using a floating roof tank and a cuboid structure with a central air termination, and an interception efficiency of 61% was achieved. An alternative case using catenary wires with a total lightning interception efficiency of 99.1% was also implemented. The percentage strike probability for the cases considered shows a close approximation to published results, and this confirms the accuracy of the implemented model. The IDEGM has the benefit of generating results with a significantly reduced computation time of just a few minutes as compared to several hours in previous models.

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An analytical consideration on the striking probability and the total amount of strikes to simple structures according to standardized regulations

Cited by 5 publications

References 3 publications

Progress on the development of a measuring instrumentation for detection of pre-discharges on a lightning rod under the influence of a negative downward leader

Progress on the development of a measuring instrumentation for detection of pre-discharges on a lightning rod under the influence of a negative downward leader

Advances in Raw Material Industries for Sustainable Development Goals

Improving the computational accuracy of the dynamic electro-geometrical model using numerical solutions

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