|Table of Contents|

Lightweight design of powertrain mounting bracket of commercial vehicle(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2023年3期
Page:
134-144
Research Field:
机械与汽车工程
Publishing date:

Info

Title:
Lightweight design of powertrain mounting bracket of commercial vehicle
Author(s):
WU Bing-jian1;  ZHANG Dong-kai2;  WANG Fei2
(1. Automobile NCO Academy, Army Military Transportation University, Bengbu 233011, Anhui, China; 2. Dongfeng Motor Corporation, Dongfeng Commercial Vehicle Technology Center, Wuhan 430056, Hubei, China)
Keywords:
automobile engineering;  powertrain;  mounting bracket;  lightweight;  numerical simulation;  bench experiment
PACS:
U463.2
DOI:
10.19721/j.cnki.1671-8879.2023.03.014
Abstract:
Aimed at the problem that driven by the demand for energy conservation, emission reduction, and energy consumption reduction, automotive lightweight represents the current direction of automotive development conduct relevant lightweight research on powertrain mounting systems was studied. The powertrain mounting bracket of a 6 t truck was taken as the research object, a reasonable and reliable lightweight design research method was proposed, which achieved the expected goal of lightweight design of the suspension bracket. First of all, in order to realize the lightweight of powertrain suspension system, the three-dimensional model of each part was established by CREO software, and the three-dimensional model was imported into HyperWorks, a CAE analysis software. HyperWorks was used to establish the numerical simulation model of the suspension bracket, and the static load strength of the mounting support under multiple working conditions was simulated and analyzed. Through the analysis of each given working condition, the stress diagram was obtained, which provided the basis for the design of weakening strong point, reinforcing weak point, and determined the topology optimization area. Then, the design conditions were loaded into the topology optimization. Using optimization in HyperWorks software to set up, the volume minimization was defined as an objective function. Setting optimization objectives, the topology was optimized respectively on the front suspension bracket and rear suspension bracket. According to the theory of volume minimization, the structural thickness of the suspension bracket was optimized, and a new scheme of gradual support reinforcement plate and replacement material was proposed.Finally, CAE was carried out to analyze the maximum principal stress, displacement and static strength of the optimization model under six design conditions to verify the rationality of the lightweight design scheme, and bench experiments were carried out to verify the lightweight results, and confirming that the static strength safety coefficient of the front suspension bracket, rear suspension bracket and other parts met the standard. The results show that the lightweight scheme has good manufacturing process inheritance. The combination of static strength simulation and experiment improves the scientific nature of suspension frame lightweighting process. Finally, the overall performance of the suspension bracket is improved, the weight of the front suspension bracket is reduced by 40%, the weight of the rear suspension bracket is reduced by 56.4%, and the lightweight effect of each part is obvious.10 tabs, 11 figs, 25 refs.

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Last Update: 2023-06-30