When structure optimization for the single work condition is carried out, the common mechanism optimization design method can provide the optimum. The chasis are supplied by automobile manufacturers, and body is built by automobile body builders as per the requirements of the customer and specifications of the different state transport undertakings. However, the apillar and the d pillar stand inclined in some vehicles for. Base, ceiling, right side, left side, front and rear. Le department of mechanical and automation engineering, dayeh university, taiwan, roc abstract the transit bus is an important part of public transportation, while in a bus. It commenced its operations in 1911, with a capacity of 1,00,000 tonnes per annum of ingots and expanded to a million tonnes per annum of saleable steel by the mid fifties. There are 814 bus body materials suppliers, mainly located in asia. Topology optimization design of the monocoque bus body. In orderto ensure that the trusts, the components of the frame, remains as the new bus body structure frame is sufficientstrong, the fe method is used to validate.
The study of bus superstructure strength based on rollover test using body sections. Utilizing the monocoque bus body structure of low floor bus as the research object and the stress as constraint conditions, this paper developed the topology optimization model with the objective function of minimum structural mass under the horizontal bending conditions. Other relevant high stress values and locations will be shown in the later 1. The increased speed and weight of modern bus puts the components of a bus body in a highly dynamic load situation. The logical tree structure is the internal broker representation of a message.
The control bus carries the control, timing and coordination signals to manage the various functions across the system. This limited warranty provided by champion bus, inc. The body tree is created by a body parser either a supplied parser or a userdefined parser, as described in parsers. Bus rollover is one of the most serious types of accident as compared to other modes of bus accidents. Applications car body body structures european aluminium. Double deck bus body structure and drivers cab design. Thank you for choosing blue birdand blue bird parts. The study of bus superstructure strength based on rollover.
Available in a wide choice of vehicle specifications and seating configurations, the companys aero bus models range from 19 to 32 in length and can seat up to 33 passengers. Choose the body frame minimum total quality as optimal objective. Optimization design of a bus body frame scientific. Bus side structures and lightweight optimization 1069 fig. Bus bodies bus body structure manufacturer from hyderabad. The code also stresses on ensuring stability and strength of the bus body structure, seat anchorages and a roll over analysis for the full body to minimise the impact if the bus were to turn turtle. This is not surprising, because the structure must perform the functions of both of these elements. Sheeting 2 manufacture the bus front and rear from fibreglass. The body of an automobile is made of a structure that is just same as that of a house. Dec 31, 2015 arai and bus body builders meet over bus code.
A new design and analysis of bus body structure iosr journal. These helps in reducing the weight and offers better load path continuity. The paper presents the new bus body conceptual design for light weight. Triz method for light weight bus body structure design. The data bus, which is a bidirectional path, carries the actual data between the processor, the memory and the peripherals. In tamilnadu karur was considered as its origin place. The car body connects all the different components. Historically, chassis designs were shared between trucks and buses, but in later years specific bus chassis have been developed, and the midibus introduced a lighter weight bus chassis than normal trucks bus manufacture historically developed as chassis and body. Strengthening bus frames to maintain residual space occupant space and minimizing occupant injury are necessary. Each element in the parsed tree is one of three types. The paper presents the new bus body conceptual design for light weight structure comparing to the existing bus body structure. Pdf rollover analysis of bus body structure as per ais. Body was constructed following cmvr guidelines of indian bus body code for coach builders. Pdf modal analysis and optimization of bus body structure.
The lightweight steelreinforced fiberglass composite body structure is durable and meets all industry performance and safety standards. Leveraging on our expertise, we are able to manufacture and supply an extensive range of bus body structure. Evaluation of the seat fastening in the frame of a road. One of the accidents in which a bus can be involved is bus rollover. Arrow coach builders a stateoftheart and high tech bus body building industry in chennai, south india an iso 9001 certified company. Bus body structures structural grade aluminium extrusions are used specification is grade 6082t6 with an ultimate tensile strength uts of 295 nmm2 bus structure required to withstand a lifetime of road inputs and have a suitable fatigue strength adl alone have designed and manufactured 40,000 bus bodies using aluminium. As a seller of the most recognized and trusted brand in student transportation vehicles, your nearest blue bird authorized dealer is your best source for original equipment and aftermarket parts to keep your. In recent years, for the sake of energy saving and environment protection, lightweight body structure becomes the trend of vehicle development. An overview of strength improvement of a bus body structure. The matching of the body structure and chassis frame causes problems which. With now close to 16 years of first release, the standard is yet to be fully implemented for various reasons.
The design variable is the thickness of the bus body frame. Rectangular, square and circular steel hollow sections. To achieve a reasonable speed of operation, a computer must be organized so. Compliance with such stringent parameters is likely to put the unorganised part of the indian bus. Tidbury the problems of designing bus and coach bodies are discussed. Bus body materials, bus body materials suppliers and. This paper selects a certain type of golden dragon bus body structure as the research object, by using ansys parametric modeling, and achieve optimization process through the isight software integration ansys. Pdf triz method for light weight bus body structure design.
Bus manufacturing had its earliest origins in carriage building. For example, the 64pin stebus is composed of 8 physical wires dedicated to the 8bit data bus, 20 physical wires dedicated to the 20bit address bus, 21 physical wires dedicated to the control bus, and 15 physical wires dedicated to various power buses. Warrantor covers the bus body and body structure when sold by an authorized dealer. To ensure strength of the bus body, all the bus body builders have to analyse their design in any one of the fea finite element analysis tool.
Its a bus super structure along with chassis having a wheel base of 222. Contents profile located at jamshedpur, tata steel ltd. Data bus a bus which carries data to and from memoryio is called as data bus address bus this is used to carry the address of data in the memory and its width is equal to the number of bits in the mar of the memory. Bus body structure, redesign, structural finite element analysis. The simplest and most common way of interconnecting various parts of the. The top supplying countries or regions are china, pakistan, and south korea, which supply 99%, 1%, and 1% of bus body materials respectively. Simulation and design of production jigs for bus chassis somsak siwadamrongpong, usawadee ongarjwutichai. Multimaterial design optimization of a bus body structure conducted a weight optimization of a bus body, considering the sidewall intrusion and static stiffness constraints. The matching of the body structure and chassis frame causes problems which have been largely overcome on an adhoc basis. Chapter 14 automotive chassis and body seabee online. Gauge optimization, vehicle weight saving the rise in fuel costs in most parts of the. The body structure needs to be rigid to support weight and stress and to securely tie together all the components. When a message arrives at a broker, it is received by an input node that you have configured in a message flow.
Lightweight optimization of bus frame structure considering rollover safety c. Market potential bus is used as the most common public transport vehicle in our. A light weight design of bus body structure is designed and structural analysis of the body structure under different load conditions is done. It has similar components which include the roof, the pillars, and the floor. The address bus is used to specify memory locations for the data being transferred. Reducing the weight of a bus body frame by 17% without. Automobile body bus body building is an important activity. Optimization analysis for fuel cell bus body structure in. The optimization was conducted to determine the minimum weight of the bus frame structure without violating the specified natural frequency constraints. Triz method for light weight bus body structure design journal of.
Modular structures made of two different materials were tested and analyzed to confirm the present methodology, first the structure made of steel that is used by the bus industry in brazil was. The bus body, such as will be dealt with, may be defined as a multiseated closed body having a fixed main roof structure with crosswise or longitudinal seating, either solely or in combination, with glass windows, a central gangway, and from. Multimaterial design optimization of a bus body structure and thickness of the selected sidewall beams, while the objectives were the mechanical performances under torsion and rollover conditions. Our expert engineers and technicians manufacture these products with utmost precision keeping in mind the requirements of the clients. The duration of the limited warranty covering the bus body ends twelve 12 months after you first take delivery of the vehicle from an authorized. Some processors use a dedicated wire for each bit of the address bus, data bus, and the control bus. The car pillar in the vehicle stands in near vertical position which supports the vehicles roof. According to ais code, performance parameters have to be followed by the bus body builders to ensure required strength. Pdf a new design and analysis of bus body structure semantic. Simulation and design of production jigs for bus chassis.
A classic finite element model of the bus body is established that focuses on analyzing. The cocoon of a bus body is basically divided into six parts. Arrow coach builders, a modern bus body manufacturing facility is located near chennai, tamil nadu, south india. Based on this objective, it is significant to make a research on optimization for the body structure. The floor frame is built together with the chassis frame. An integrated frame and body type construction allows an increase in the amount of noise transmitted into the passenger compartment of the vehicle. A comparative study of aluminium bus body structure before and after modifications in structure is done to troubleshoot the problem of superstructure strength. Design and analysis of a bus body side frame modeling the structure, weight reduction is the prime objective. Primary reason being the paradigm shift in the way a bus body is recommended to be built by bus body code. Optimization of mechanical response of automotive and body designs are increasingly relies on new models. The bus body geometry was obtained directly from the threedimensional computeraided design files. The body tree is a structure of child elements that represents the message content data, and reflects the logical structure of that content. Bus body materials products are most popular in southeast asia, mid east, and north america.