本文在SD120Y15HKS大客车设计初期,采用SAP—5通用计算程序,用有限元法分析了该车全承载式车身结构的强度、刚度问题。在客车基础条件不变的情况下,仅通过结构的多种变化和对其各种刚架结构中的内力、各梁的应力及位移分布规律的全面分析,从中优选出了大型客车较合理的承载式车身结构方案。 In the early design of SD120Y15HKS bus, SAP-5 universal calculation program was used to analyze the strength and stiffness of the full-load vehicle body structure with finite element method. Under the condition that the basic conditions of passenger cars are unchanged, a comprehensive analysis of the stress and displacement distribution of internal forces and beams in all kinds of rigid frame structures is made only through a variety of structural changes, and the rational selection of large passenger cars Car body structure program.