Computer Aided Analysis On Structure Strength Of Lightweight Saloon Seat

With the rapid development of China’s economy, the situation ofdemands for transportations in cities is increasingly serious. Therefore,limitations of transportation largely suppress the development of cities. Thesubway, as a way of transportation, becomes the main way for people to travelin cities due to its non-polluting, large volume, rapid speed, place-saving, aswell as easement of the transportation pressure to a large degree.However, how to effectively reduce the operation and construction cost,Saving budget of the subway is becoming more important. So, optimization ofthe structure of the metro vehicles become quite essential, Since saloon seatsare important parts of the metro, lightweight seats structure can significantlyreduce raw material consumption and the manufacturing cost of the metrovehicles. And lightweight seats should be conducted at the premise that thebasic performances of seats are ensured.To meet the requirements of the manufacturer this article conducts studyon the lightweight of the Hanging longitudinal direction arrangement ofsix-passengers saloon seats, and designes two brackets supporting passengers’seats structure. We use Finite Element Analysis Software to build finiteelement models. That is to say, through finite element analyses of the subwaybodywork with three brackets supporting passengers’ seats which haven beenput into use and that with two brackets we designed, we could find the weaksections when withstanding force before and after seats lightweighting.Whether weak areas analysed by finite element software meet therequirements when the subway vehicles is working.Since the result analysed by ANSYS is a simplification of the actualsituations, the result could only work as a guide, and the accuracy still needsfuture validation. In order to verify the rationality of results analysed byANSYS, this article conducts static-loading tests under ten work conditions by imitating the actual operation situations. After finding the points on theseats which withstand greater force actually, we paste strain gauges in thecorresponding positions on the seats, and imitate the situations that differentpeople using the seats at different time in actual operations. Through Labviewprograms on the PC to get real-time collection and monitor seats situations for1.2million times, we get the displacement deformation situations of seatsbefore and after seats lightweighting, and make comparative analyses.Confirmed by experiments, after the lightweight,Each parts of seats is intactat the lifespan, deformation of the displacement brought by seat put into usecan meet the the normal use of the deformation limits. The seats we desianedis consistent with the requirements of the state and can be put into use.