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High Frequency Vibration Transmission Analysis on Agricultural Tractor by Using Combined Dynamical Energy Analysis and Transfer Path Analysis Approach

University of Nottingham-Gregor Tanner, Martin Richter
Yanmar R&D Europe s.r.l-Satoshi Morita
  • Technical Paper
  • 2019-32-0527
Published 2020-01-24 by Society of Automotive Engineers of Japan in Japan
Dynamical Energy Analysis (DEA) has recently been introduced as a mesh-based high frequency method modelling structure borne sound for complex built-up structures. Using DEA, the structure-borne sound of an assembled agricultural tractor was calculated and good agreement between measurement and DEA calculations has been shown. However, it is still difficult to model a solid structure as currently DEA is based on wave-transmission calculations through plates and plate-to-plate junctions. Additionally, it is often difficult to generate accurate FE meshes of assembled complex structures because of welds, bolts, and rubber brushes between components. In this paper, we propose a novel method to generate DEA elements based on measurement data in order to model solid parts of a complex structures. The method of Advanced Transfer Path Analysis (ATPA) is employed to extract energy-transmission characteristics of a structure. Firstly, Frequency Response Functions (FRFs) are measured between interface points on a structure. Then the direct transfer functions between all interface points are calculated using ATPA. Finally, DEA elements connecting interface points are calculated. They are based on the ATPA result…
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Rolling Circumference Index Groups for Agricultural Tractor Drive Tires

MTC8, Tire and Rim
  • Ground Vehicle Standard
  • J2523_201911
  • Current
Published 2019-11-20 by SAE International in United States
This SAE Standard is established for the following purpose: a Simplify the application of drive wheel tires to agricultural vehicles especially those with multiple drive axles having tires of different sizes. b Provide a pattern to combine similar sized tires into Rolling Circumference Index groups with uniform spacing between groups.
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Towability Design Criteria and Equipment Use - Passenger Cars, Vans, and Light-Duty Trucks

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1142_201910
  • Current
Published 2019-10-28 by SAE International in United States
This SAE Recommended Practice describes the type of equipment commonly used with towing equipment, provides information to calculate safe steering loads, and outlines design criteria.
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Design of Light Weight Hydraulic Connecting Rod for Agricultural Tractor

Mahindra & Mahindra, Ltd.-Mahendra Dumpa, Solairaj Perumal, Dinesh Redkar, Maxson Gomes, Prasanna Balaji Subbaiyan
Published 2019-10-11 by SAE International in United States
Hydraulic power train assembly of an agricultural tractor is meant to controls the position and draft of the implement depending upon the type of crop, farming stage, implement type and soil conditions. These variations induce extreme range of loads on the hydraulic system, thus making it challenging to design these components. Hydraulic connecting rod is critical component of hydraulic power train assembly. Standards like IS12224, IS4468 governs the design of hydraulic power train components which regulates the test method for hydraulic power and lift capacity of the tractor.In this paper, a virtual simulation process has been established to design a hydraulic connecting rod to meet the requirements. The hydraulic connecting rod basically functions as a short load transferring link, which is subjected to the operating hydraulic pressure of the hydraulic lifting mechanism. The current circular connecting rod is higher in weight and cost. So, there is scope for optimizing the design of connecting rod. Virtual simulation has been done by performing (i) Multi body dynamics analysis (MBD) approach is used to predict the loads on…
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Industrial and Agricultural Disc Wheels

MTC8, Tire and Rim
  • Ground Vehicle Standard
  • J712_201909
  • Current
Published 2019-09-25 by SAE International in United States
The purpose of this SAE Recommended Practice is to provide a selection of disc wheels for industrial and agricultural application with a maximum of interchangeability. This is accomplished by establishing five groups of disc wheels, in each of which the hub mounting elements are common. These groups are designated 4 bolt, 5 in bolt circle; 5 bolt, 4.5 in bolt circle; 5 bolt, 5.5 in bolt circle; 6 bolt, 6 in bolt circle; and 8 bolt, 8 in bolt circle. Further, this document establishes an SAE part number and the maximum rated radial load for each standard wheel. In addition, the document requires the wheel manufacturer's name or trademark to be impression stamped on the wheel with location at the discretion of the manufacturer.
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Three-Point Hitch (Type A) Backhoe Personnel Protection

OPTC1, Personnel Protection (General)
  • Ground Vehicle Standard
  • J1518_201908
  • Current
Published 2019-08-28 by SAE International in United States
This SAE Recommended Practice applies to three-point hitch (Type A) backhoes as defined in SAE J326 when mounted on either an agricultural tractor as defined in ANSI/ASAE S390 or other off-road self-propelled work machine as defined in SAE J1116. This criterion is intended for the manufacturer of the backhoe, whether or not the backhoe is manufactured or marketed by the same company that manufactures or markets the propelling machine.
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Guarding of Starter System Energization

OPTC1, Personnel Protection (General)
  • Ground Vehicle Standard
  • J1493_201908
  • Current
Published 2019-08-08 by SAE International in United States
This SAE Standard describes guarding to help prevent hazardous machine movement caused by activation of the starter motor by bypassing the starter control system. This document is applicable to off-road, self-propelled work machines, as identified in SAE J1116, and agricultural tractors, as defined in ANSI/ASAE S390, which have the potential for hazardous machine movement as a result of bypassing the starter control system and powering of the starter motor.
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Component Nomenclature - Articulated Log Skidder, Rubber-Tired

MTC4, Forestry and Logging Equipment
  • Ground Vehicle Standard
  • J1109_201908
  • Historical
Published 2019-08-07 by SAE International in United States
This SAE Standard includes names of major components and parts particular to this type of machine.
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Truck and Bus Aerodynamic Device and Concept Terminology

Truck and Bus Aerodynamics and Fuel Economy Committee
  • Ground Vehicle Standard
  • J2971_201908
  • Current
Published 2019-08-02 by SAE International in United States
This SAE J2971 Recommended Practice describes a standard naming convention of aerodynamic devices and technologies used to control aerodynamic forces on truck and buses weighing more than 10000 pounds (including trailers).
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Smart Agriculture Sensors: Helping Small Farmers and Positively Impacting Global Issues, Too

  • Magazine Article
  • TBMG-34585
Published 2019-06-01 by Tech Briefs Media Group in United States

Smart agriculture, also known as precision agriculture, allows farmers to maximize yields using minimal resources such as water, fertilizer, and seeds. By deploying sensors and mapping fields, farmers can begin to understand their crops at a micro scale, conserve resources, and reduce impacts on the environment. Smart agriculture has roots going back to the 1980s when Global Positioning System (GPS) capability became accessible for civilian use. Once farmers were able to accurately map their crop fields, they could monitor and apply fertilizer and weed treatments only to areas that required it. During the 1990s, early precision agriculture users adopted crop yield monitoring to generate fertilizer and pH correction recommendations. As more variables could be measured and entered into a crop model, more accurate recommendations for fertilizer application, watering, and even peak yield harvesting, could be made.