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VDI Wissensforum GmbH - LAND.TECHNIK AgEng 2023

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VDI Wissensforum GmbH (Hrsg.)

LAND.TECHNIK AgEng 2023

Reihe: VDI-Berichte

Band 2427 2023

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T. Herlitzius, H. Döll, M. Lindner Tyre testing methodology to evaluate contact pressure distribution and simulation of the resulting soil compaction risk S. 247-254

„… , time-dependent pressure-settlement behaviour of the soils, for example according to terra-mechanical models from …” „… on the soil is done by simulating the three-dimen-sional soil pressure distribution, which is …” „… pressure and working speed for large-volume ag-ricultural tyres has an increasing influence on soil stress …”

C. A. Arévalo-Montaña, S. Böttinger Tractive effort prediction based on dynamic soil parameters S. 235-246

„… pressure-sinkage relationship was measured for the soil of the experimental area penetration rate of 25 mm/s …” „… plate simulating the contact area of a tyre or track press vertically the soil. The pressure p and the …” „… discussion 4.1 Soil response to normal loads Fig. 4 in the appendix shows the pressure sinkage relationship …”

C. Birkmann, C. Schaub, M. Schmotz, N.-K. Rose, S. Walther, P. Guillaume Multi-Dimensional Three-Point-Hitch Control to Optimize Performance, Efficiency and Working Quality of Tractor Implement Combinations S. 181-190

„… tractor, used a pressure-controlled hydraulic top link [3], [4]. Field measurements with four-furrow plows …” „… control. This control strategy adjusts the height of the lower links, e.g. when using soil …” „… -cultivation implements such as plows, cultivators, sub-soilers etc. and for implements that have no or little contact to …”

S. Becka CFD/DEM coupling for the optimization of air conveyor sections of pneumatic seed drills S. 413-416

„… demands on the blower but also on other components such as the pressure-tightness of sluices, tanks and …” „… pressure. However, with an increasing number of outlets, it has been proven that the output quality …” „… and arrival time of the respective media (seed, fertilizer, other components) in the soil and thus …”

C. Schaub, R. Schütte Performance optimization of CVT standard tractors in front loading application S. 21-28

„… machines for all farming-applications. Each application like soil-cultivation, transport or front loading …” „… not allow a differentiation between tractor applications like soil cultivation, transport or front …” „… adjustment time of 250 ms to control a full stroke. A high-pressure actuated cylinder to adjust the ratio of …”

L. Angelucci, M. Mattetti, F. Pinet, A. Vertua Traction test methods to assess the energy efficiency of agricultural tractors and tires S. 263-268

„… 263(IF), and Very High Flexion (VF) tires [4], affecting the transmission efficiency and the tire-soil …” „… 30 Rear – Front pressure [bar] 1 – 1 Rear – Front dynamic rolling radius [m] 0,971 – 0,736 A GNSS …” „… have the reaction at the soil. The double correction is described by the equation, Eq. (1): 𝐹 𝐹 …”

Titelei/Inhaltsverzeichnis

„… evaluate contact pressure distribution and simulation of the resulting soil compaction risk 247T …” „… , Austria Cultivation“GrindStar“ – More efficiency, effectiveness, and economy with ultrashallow soil …” „… for DEM soil calibration 79F. Gerdes, L. Frerichs, Institute of Mobile Machines and Commercial …”

M. Hengst, T. Herlitzius, H. Fichtl, I. Mai, K. Ludwig Field Tests with the Modular and Scalable Tillage Systems Feldschwarm S. 555-0

„… disk harrow for shallow tillage (Figure 2) and the second unit has installed a cultivator for soil …” „… soil  Second test period o 17. – 24. of August 2022, LVG Köllitsch o Wheat stubble; in the beginning …” „… dry soil; in the end slightly damp conditions  Third test period o 17. – 02. of November 2022, South …”

S. Geißler, T. Herlitzius Simulation of filling and venting operations in agricultural cold heat networks by using CFD and the Volume of Fluid method S. 417-424

„… in the soil the near-surface usage of geothermal energy from agricultural and communal areas is a …” „… the surrounding soil. In monovalent operation (heating in winter and cooling in summer), modern …” „… practical conditions and thus also ensure a uniform flow velocity due to constant pressure losses. The …”

J. Konrad, C. Varlese, C. Junger, R. Krizan, P. Hofmann Fuel cell electric powertrain for the agricultural tractor – FCTRAC: development, performance, and benchmarking S. 49-56

„… standstill to very high traction for fieldwork. The vehicle must be as light as possible (soil compaction …” „… ) for the auxiliary components. The FC is supplied with hydrogen from the 700 bar high-pressure storage …” „… HV cooling circuit to parallel branches according to packaging, pressure drop, and flow rates. The …”

R. Grimm, M. Kügle, F. Kattler, J. Mayer, A. Fekete, M. Sepp Classifying tractor operational modes using a supervised machine learning model S. 93-108

„… operated over time. These metrics typically consider factors like engine load, speeds, pressures, torque …” „… pressure iForest data cleansing, model building Engine speed Computation of PTO gear rear, iForest data …” „… cleansing, model building Fuel delivery pressure iForest data cleansing, model building Fuel rate iForest …”

C. Nöß, J. Weller A Fuel Cell Tractor in Operation – Concepts and Field Data S. 39-48

„… the establishing of a production facility for high pressure vessels in the town of Haren (Ems). 2 …” „… range that can be operated with green energy, several requirements have been defined. Soil compaction …” „… reducing the pressure to 12 bars, hydrogen is supplied to the fuel cell by a hose. The whole system …”

doi.org/10.51202/9783181024270

VDI Wissensforum GmbH - LAND.TECHNIK AgEng 2019

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VDI Wissensforum GmbH (Hrsg.)

LAND.TECHNIK AgEng 2019

Reihe: VDI-Berichte

Band 2361 2019

Treffer in den folgenden Teilen:

T. Fedde, M. Peeters, R. Stirnimann Soil pressure and pulling behavior of standard and half-track tractor chassis concepts S. 35-46

„… Soil pressure and pulling behavior of standard and half-track tractor chassis concepts Dr.-Ing …” „… system. This effect can lead to an uneven contact pressure in the belt-soil contact. To evaluate the …” „… pitch effect and the risk of soil compaction, measurements of the ground pressure with “Bolling Sensors …”

J. L‘Heureux Four-Tracked Solution for Large Row Crop Tractors S. 305-310

„… clay soils. Key design focus was given to maintaining uniform track to soil contact pressure by …” „… importance of application timing as well as minimal disturbance to the soil to optimize yield. As a result …” „… excellent traction capabilities with robust performance in adverse ground conditions while minimizing soil …”

G. Molari, M. Mattetti, M. Varani, F. Paolini, S. Fiorati, P. Mancinelli, K. Štefek, C. Di Dio Field performance of Trelleborg PneuTrac tyres S. 57-62

„… powerful, so bigger tyres are necessary to the exert adequate traction forces and to limit the soil …” „… compaction. Nevertheless, in the last 50 years, wheel load has increased more than twice the tyre-soil …” „… contact area, consequently, soil compaction caused by tractors has been increased as well. A tractor …”

S. Igl, G. Grommer, M. Auer, K. Grad Power Trains, Electric Drives and Mobile Hydraulics S. 135-144

„… the pressure on the soil. However, caterpillar drives also have disadvantages, such as high cost …” „… penetrate deeper into the soil. Due to greater contact pressure, compaction and pressure propagation …” „… parameters, resulting in yield losses. Fig. 2: Mechanism of pressure propagation into soil depth with …”

Titelei/Inhaltsverzeichnis

„… and Soil Soil pressure and pulling behavior of standard and half-track tractor chassis concepts …” „… Control, Darmstadt An Analysis of the Energy Consumption in the High-Pressure System of an Agricultural …” „… Sciences, HAFL Development of a tire-soil interaction model for agricultural tractors …”

V. Stocklin, M. Zimmer Development of future machine concepts for the needsbased fertilisation of individual plants – The RAUCH MultiRate dosing system for pneumatic spreaders AERO GT and AERO X S. 447-454

„… pollution is becoming increasingly important to the agricultural industry due to social pressure …” „… nutrients in the soil. Pneumatic spreaders exhibit the greatest potential for satisfying the requirements …” „… "poisons". It is necessary to satisfy increasing public demands for reduced environmental pollution (soil …”

T. Herlitzius, H. Fichtl, A. Grosa, M. Henke, M. Hengst Feldschwarm – Modular and Scalable Tillage Systems with Shared Autonomy S. 409-420

„… contact pressure is one factor that deteriorates soil quality [1]. With the continuing increase of weight …” „… to put pressure on farm businesses and machine manufacturers to re-organize the machine systems …” „… highly productive environment is to maintain soil fertility. Soil compaction due to high axle loads and …”

D. Engelmann, S. Becker, R. Stirnimann Transferring agricultural machines from field to the laboratory for emission check S. 479-488

„… during operation (field / road, different types of soil). The tire pressure can change via a tire …” „… example, the agricultural tractor is used widely in different applications from transportation to soil …” „… pressure regulator. 5. Adaptation of road simulation for field operations The aim of the approach is …”

J. Philipp Behra Development of increased tire diameters and the effects on axles and drive trains of a combine harvester S. 553-560

„… pressure to protect the soil and increase the yield for years to come. Therefore, it is necessary to …” „… to 46,4% more load at the same inflation pressure is possible. The tires on the rear axle had an …” „… and road. With the new 1,75m tire, the axle load can be 25,4% higher at the same tire pressure, while …”

M. Bouten, T. Meinel, W. Kath-Petersen Development and utilization of a new application system for precise fertilizer placement in corn S. 513-520

„… stationary simulation of the fertilizer placement in soil enabled the efficient optimization of these …” „… robust fertilizer coulters are mounted to open the soil and to apply the fertilizer band. The technical …” „… fertilizer portions in the soil is simulated and can be efficiently optimized. A result of the application …”

M. Sax, R. Latsch, T. Anken, V. Moser, P. Krummenacher Automated site-specific overseeding of grassland S. 165-228

„… competitive pressure of the existing sward [4]. Seeds can only germinate and close the gaps, if they are in …” „… direct contact with the soil and have enough space and light to grow. In case of many small gaps, a …” „… performed by image binarization. Hereby each pixel is either assigned to grass (white) or soil (black). In …”

doi.org/10.51202/9783181023617

VDI Wissensforum GmbH - Land.Technik AgEng 2017

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VDI Wissensforum GmbH (Hrsg.)

Land.Technik AgEng 2017

Reihe: VDI-Berichte

Band 2300 2017

Treffer in den folgenden Teilen:

J. Wieckhorst, T. Fedde, L. Frerichs A Traction Field Test – Real Time Tire Soil Parameters of a Tractor in Tillage Applications S. 431-438

„… . 1. Motivation The tire inflation pressure of a tractor does not only have an impact on soil …” „… the tire inflation pressure as much as possible in order to reduce soil compaction and to increase …” „… tire-soil-mappingA and tire-soil-mappingB tirepressureB Fig. 1: Comparison of two tire pressure settings regarding …”

P. Vervaet, M. Gandillet ‘2 in 1 tire’ technology to allow maximal efficiency of the transmission chain in both road and field usage S. 447-452

„… pressure. Depending on the soil conditions, it brings a potential increase of 20 to 50% of traction force …” „… Abstract The tire and the tire/soil interaction play a major role in the efficiency of the transmission …” „… , slippage and sinkage of the tire in the soil, more than 30% of the power available at the axle is not …”

A. Sharda, R. Strasser, M. Rothmund Development and Utilization of a Planter Automatic Downforce Evaluation Test Stand to quantify System Response and Accuracy S. 345-354

„… seen integration of automatically controlled row unit downforce systems to reduce soil compaction …” „… fields. Simulation scenario were developed to 1) operate planter at varying speeds with uniform soil …” „… type and moisture; and 2) operate on soil with varying resistance due to texture and/or moisture …”

M. Peeters, V. Kloster, T. Fedde, L. Frerichs Integrated wheel load measurement for tractors S. 423-430

„… and Commercial Vehicles, Technische Universität Braunschweig Abstract Soil protection and …” „… today. A minimum axle load is the sweet spot for soil protection, whereas a certain weight is necessary …” „… contact area to the soil. On the one hand there is the need to distribute the tractor weight proportional …”

C. Birkmann, T. Fedde, L. Frerichs Influence of the Drive Train and Chassis on Power Shift Operations in Standard Tractors S. 439-446

„… Nr. 2300, 2017440 clutch is reduced by releasing the safety pressure against slippage. In addition …” „… clutch increases by reapplying the safety pressure. S pe ed 0 1000 0.2 0.4 0.6 0.8 1.21 1.4 1.6 2 500 …” „… TClutch 2, theoretical slippage pointpressure release reapplying pressure Fig. 2: Basic power up-shift …”

K. T. Renius 75 Conferences on Agricultural Engineering – a great Period of Innovations – Highlights of a Success Story S. 1-8

„… constant vertical soil pressure under tires of unique inflation and contact pressures for a …” „… ]. important influence of tire loads on the soil pressures in the deeper layers, Fig. 5. These three …” „… , first-time presenting his famous pressure bulbs under tires. He demonstrated already in 1951 the …”

K. Szalay, L. Kovács, G. Bércesi, I. Oldal, E. Piron, J. Charlat, T. Joly, C. Poncet, F. Tran Agricultural Tire Energy Efficiency test method and dedicated equipment to measure the fuel consumption and traction of agricultural tires under real field conditions S. 407-416

„… of soft soils, and the usage conditions (vertical load; inflation pressure; applied driving torque …” „… standardized soil conditions. In this paper a novel dedicated equipment is presented which uniquely provides …” „… soil compaction, by tire slippage, and by rubber viscoelasticity. The remaining two-thirds are used …”

F. Haussmann, R. Obermeier- The CLAAS AXION 900 TERRA TRAC Product Range – Benefits of the CLAAS Axion 900 halftrack tractor concept Hartmann equipped with CLAAS Big Driver Terra Trac S. 127-134

„… track machine in terms of pulling capacity, efficiency and soil protection with a dynamic behavior …” „… and a lower ground pressure due to a larger foot print. Figure 1 shows how the traction efficiency …” „… seen as a good alternative versus duals. Indeed it offers a reduction of the ground pressure on the …”

A. Meiners, S. Häberle, S. Böttinger Advancement of the Hohenheim Tractor Model – Adaption on current demands S. 245-254

„… approaches are discussed for the tyre-soil model. This concerns the demand for reproducing large tyres of …” „… soil-climate regions in Germany and relevant regions of the EU. Each of them is represented by a typical …” „… abstractly modelled soil and the running gear of the tractor and implement and with the attached tools of …”

L. Meyer, P. Noyer Holistic Tractor Setup and Optimization System – CLAAS Electronic Machine Optimization for the Tractor S. 185-190

„… performance, efficiency, soil protection and working quality. CLAAS Tractor has developed a new system to …” „… natural resources such as soil a major focus for the farm manager who has to respect legal regulation as …” „… tables [2] or web applications are widely availed. Tire pressure recommendations have been made through …”

S. Krieger, E. Schnur, M. M. Brenninger The Potential of CVTs in Tracked Tractors around 400 hp S. 135-142

„… increasing, the range around 400 hp is still a very relevant one. The discussion on how to address soil …” „… ground pressure of a modern track system with several tyre setups. The duty-cycle of a tractor with …” „… ++ + ++ + 0 ++/-- +/-- - Soil interaction - - + + 0 0 0 0 Many more or different criteria could be taken …”

M. Sieting, J. Krüger, H. J. Meyer Evaluation of a Suspension Concept of a Hydropneumatic Full Suspended Tractor with Focus on the Dymnamics in Combination with Implements S. 281-290

„… vertical dynamics of the vehicle with and without a rear attached mass 2. Vertical dynamics in soil …” „… dynamic wheel-load coefficient (DWC) were plotted for three different preload pressures (min.: 50 bar …” „… , basic set-up: 69 bar, max.: 180 bar) of the hydropneumatic suspension. The preload pressure represents …”

C. Ehlert, L. Erger Development of an Intelligent Stretch Brake System S. 143-148

„… increases the rear axle load, and therefore the maximum transferable force within the tire soil contact …” „… High Pressure Driving Direction Push / Pull State MMI‘s CMOTION Brakepedal Handbrake Activation Switch …” „… the demanded brake pressure. Modern VDI-Berichte Nr. 2300, 2017 147 tractors provide adjustment …”

C. Geiger, M. Geimer Efficiency Optimisation of a Forestry Crane by Implement Hydraulics with Energy Recovery S. 175-184

„… forwarder was equipped with sensors for cylinder positions and chamber pressures for all consumers. The …” „… pressure and flow supplied by the hydraulic pump were also measured. Furthermore, the control signals from …” „… forestry machines on the soil, whereby environmental sustainability is enhanced. By following the findings …”

A. Yatskul, J.-P. Lemiere Reasons of irregularity of seed’s distribution in the divider heads of air-seeders S. 337-344

„… air-delivery system, for transporting the metered seeding material from a main storage hopper to the soil …” „… changes in the flow, causing important pressure drops [8, 13, 20]. High-speed video analysis allows us to …” „… pressures), but also the particle flow. In all cases, we noted the collision with the exterior wall of the …”

doi.org/10.51202/9783181023006

VDI Wissensforum GmbH - AgEng LAND.TECHNIK 2022

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VDI Wissensforum GmbH (Hrsg.)

AgEng LAND.TECHNIK 2022

Reihe: VDI-Berichte

Band 2406 2022

Treffer in den folgenden Teilen:

S. Gros-Hardt, H. Korte Smart Traction – Design And Experimental Set up of a Track and Traction-Regulated Caterpillar-Track Chassis for Agricultural Tractor-Trailer Combinations S. 589-594

„… contact area (for a low soil contact pressure) due to their need of VDI-Berichte Nr. 2406, 2022 589 …” „… necessity on the field for the chassis to interact as gently as possible with the soil, limiting unnecessary …” „… damage. A consistent focus on more soil protection, as prescribed, for example, by the Fertiliser Act in …”

J. Maxa, S. Thurner, J. Heel, M. Hofmann Analysis of three different methods for reducing water ragwort (Jacobaea aquatica) on grassland S. 617-624

„… ” and (iii) the new method using a hot water high-pressure cleaner (80°C and 106 Pa with the treatment …” „… , grassland inventory, soil conditions, management and climate. All three analysed methods were able to …” „… water combined with high-pressure. Materials and methods Study sites In the field trial, three …”

H. W. Griepentrog, A. Stana, D. Reiser Concept and performance of an autonomous precision seeder for grain crops – Optimization of seed embedding into the soil S. 561-566

„… embedding into the soil Prof. Dr. H. W. Griepentrog, M. Sc. A. Stana, Dr. agr. D. Reiser, University of …” „… Hohenheim, Stuttgart Abstract A precise and even grain seed embedding into the soil has a big potential to …” „… pesticide use, negative climate effects, soil quality degradation and economic costs. A more precise and …”

E. M. Doumbia, T. Amon, S. Hempel Pressure drop of an animal occupied zone depending on the animals positioning S. 381-386

„… Pressure drop of an animal occupied zone depending on the animals positioning Dr. E. Moustapha …” „… without cubicles, with cubicles, at night) were undergone. The pressure drop were evaluated und were …” „… show that there were little discrepancy between the AOZ configurations in term of pressure drop for low …”

S. Kubinski, T. Meinel Methodology for the development of a plant detection system based on mechanical properties of crops using the example of corn – Contribution to the cost-effective enabling of plant-individual care mea... S. 135-140

„… terms of yield, corn has low soil and water availability requirements during most of the growing season …” „… was examined. In 3D-Saat the seed depth is adjusted during the sowing in dependence of the soil …” „… , which is realized by two pressure levels and two pneumatic quick-acting valves. On the one hand, the …”

M. A. Moreno-Teruel, F. D. Molina-Aiz, D. L. Valera-Martinez, A. Lopez-Martinez, F. Baptista Numerical and Experimental Analysis of the Stomatal Resistance of a Tomato Crop in Almería (Spain) S. 439-446

„… , vapour pressure deficit values between 9.6 and 22.2 hPa and CO2 concentrations of 388-580 ppm. Keyword …” „… environmental conditions and the availability of water in the soil or substrate [1]. The stomatal opening can be …” „… such as photosynthetically active radiation (PAR), CO2 concentration, leaf-air vapour pressure …”

S. H. F. Al-Rikabi, E. Santolini, M. Bovo, A. Barbaresi, D. Torreggiani, P. Tassinari, B. Pulvirenti Definition of a Porous Media Model Simulating the Presence of a Small Canopy Crops in a Greenhouse – CFD simulations and comparison with experimental tests S. 639-648

„… indoor air, and the soil. Moreover, the adoption of this model helps to clarify the mechanism of thermal …” „… represent the heat exchange: ? 2 ??? ? ?? ? ? Where: Cp is air specific heat under constant pressure (J …” „… includes the greenhouse, the soil, the beaches with the crops and the concrete floor, with exact dimensions …”

Titelei/Inhaltsverzeichnis

„… for Agricultural Engineering and Bioeconomy (ATB), Potsdam, Environment, Soils and Land-Use, Teagasc …” „… , Johnstown Castle, Co. Wexford. Ireland,G. Lanigan, Environment, Soils and Land-Use, Teagasc, Johnstown …” „… Agricultural Engineering and Bioeconomy (ATB), Potsdam,D. Krol, Environment, Soils and Land-Use, Teagasc …”

doi.org/10.51202/9783181024065

Christian Woitzik - Experimental testing and numerical simulation of granules as crash absorber for double hull structures

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Christian Woitzik

Experimental testing and numerical simulation of granules as crash absorber for double hull structures

Reihe: Mechanik/Bruchmechanik

Band 356 2021

Treffer in den folgenden Teilen:

Constitutive equations and numerical implementation S. 6-23

„… – the pressure-dependent response of the soil, e.g. change in friction angle – is already included due …” „… . Both are used in soil mechanics. This is followed by a brief description of the elasto-plastic material …” „… used in soil mechanics [61, 74, 75] and its material parameters can be derived quite simply. In …”

Determination of bulk particle properties S. 40-63

„… or saturated soils [61]. It is based on DIN 18 137 - D and its successor DIN 17892-8 [140]. The aim …” „… Filter Cell fluid Granules Rubber membrane Filter O-ring Bottom plate F Pore pressure Cell pressure …” „… approximately 120 mm. The cell fluid allows to apply different pressures in radial direction, which is necessary …”

Introduction S. 1-5

„… , material models for soils and granules are known, but they are primarily used for soil modelling. Thus, the …” „… elasto-plastic models can be found in [55]. A common choice for granular material in geomechanics or soil …” „… ], as well as improvements regarding high confining pressures [71]. 1.3 Purpose and scope of this thesis …”

Bibliography S. 119-136

„… , Non-associated plasticity for soils, concrete and rock, in: H. J. Herrmann, J.-P. Hovi, S. Luding (Eds.), Physics …” „… ) 46–58. doi:10.1016/j. cma.2010.12.023. [59] K. Terzaghi, Theoretical Soil Mechanics, John Wiley & Sons …” „… comprehensive constitutive equation for granular materials, Soils and Foundations 36 (1) (1996) 1–12. doi …”

doi.org/10.51202/9783186356185

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