关键词: 轻客车身；鱼骨图法；CAE 仿真；耐久试验

Abstract: This article is to solve the problem of a light bus body being broken down, the fishbone diagram method is used to track that the failure, with compute aided engineering (CAE) simulation technology to deep dive failure mechanism. This article reflects the suspension jump is too small, leads to the failure of the body longitudinal beam due to insufficient buffer. Though this article come up with adding the reinforcing plate, which make the balance of the engineering feasibility and best cost-efficiency. The improvement makes the body strength meet the design requirements, and the samples are performing well during the durability test, with no failure occurred. This article combines the fishbone diagram and CAE simulation, address the issue exactly, optimize the body structure with high efficiency, finally fixed the risk of failure risk, verified the effectiveness and practical credibility, offered a well reference for the same type of issues solution.

Key words: light bus body; fishbone diagram method; CAE simulation; durability test