| 惯性载荷作用下的框架结构安全性研究 |
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| 引用本文： | 张大千,张天侠,赵维涛,张国胜.惯性载荷作用下的框架结构安全性研究[J].机械科学与技术(西安),2010(5). |
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| 作者姓名： | 张大千 张天侠 赵维涛 张国胜 |
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| 作者单位： | 东北大学机械工程与自动化学院;沈阳航空工业学院航宇学院; |
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| 基金项目： | 中航一集团航空基金项目(2007ZA54001)资助 |
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| 摘 要： | 对飞行器、车辆的整体结构进行安全性分析时,考虑惯性载荷的计算模型显然更符合实际情况。笔者从结构可靠性分析的基本理论出发,提出了考虑动荷系数时,空间框架结构强度可靠性分析的方法,推导了梁板结构安全余量、惯性力和位移对随机变量灵敏度的计算公式。通过编制相应程序,用泰勒展开随机有限元设计验算点法研究了某客车车身结构的可靠性。算例表明:考虑惯性载荷的作用后,车身结构的失效概率有所增大,安全性降低,惯性力的影响不能忽略。
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| 关 键 词： | 动荷系数 框架结构 可靠性 灵敏度 随机有限元 强度 |
Safety Analysis of Frame Structures with Inertia Load |
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| Zhang Daqian,Zhang Tianxia,Zhao Weitao,Zhang Guosheng.Safety Analysis of Frame Structures with Inertia Load[J].Mechanical Science and Technology,2010(5). |
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| Authors: | Zhang Daqian Zhang Tianxia Zhao Weitao Zhang Guosheng |
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| Affiliation: | 1School of Mechanical Engineering and Automation/a>;Northeastern University/a>;Shenyang 110004/a>;2Shenyang Institute of Aeronautical Engineering/a>;Shenyang 110136 |
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| Abstract: | A more practical calculation model is provided when considering inertia load for the study of the safety of aircraft and vehicle frame structure.Based on the fundamental principle of structural reliability and dynamic load coefficient(DLC),a method for analyzing the reliability of strength of spatial frame structures is proposed and the mathematical expressions of the sensitivities of safety margin,inertia load and node displacement to every random variable are derived.A program is developed and the reliabi... |
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| Keywords: | dynamic load coefficient(DLC) frame structures reliability sensitivity stochastic finite element method(SFEM) strength |
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