基于能量守恒的商用大飞机Riera撞击曲线速度模型研究与改进

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (22) : 143-149.

论文

李建波1,2，杨凯1,2，梅润雨1,2

作者信息 +

Improved velocity model in the Riera impact loading formula for commercial large aircrafts on the basis of energy conservation principle

LI Jianbo1,2,YANG Kai1,2,MEI Runyu1,2

Author information +

文章历史 +

摘要

以Riera公式表征的飞机撞击载荷曲线在核电安全壳结构安全评估中发挥着重要作用。但基于动量定理的短撞击持时、常速度假定，在商用大飞机撞击分析中会大幅高估撞击载荷，存在适用性的问题。基于波音767-200ER和空客A340-300两种大飞机的精细化模型，开展了飞机撞击过程的细致非线性冲击模拟，提取了载荷时程曲线，并与Riera公式开展比较研究。基于能量守恒的原则，提出了Riera双线性速度模型，给出了速度曲线的定量拟合算法，改进了Riera公式法在大飞机撞击分析中的适用性，并从有限元精细化模拟及能量理论推导两方面验证了其合理性，可为核电抗商用大飞机撞击安全评估提供更为合理的技术依据。

Abstract

The Riera formula plays an important role in the evaluation of aircraft impact loading for the safety assessment of nuclear power plant containment.However, due to the assumption of short time duration and constant velocity, the traditional Riera formula based on the momentum theorem maybe greatly overestimate the loading magnitude in the large aircraft impact analysis.It leads to an applicability problem about the Riera formula.By using the fine model of the common commercial aircraft of 767-200ER and A340-300, the impact loading time history curve was extracted from the nonlinear simulation process of the aircraft impact, and compared with the Riera formula results in detail.Further, based on the energy conservation principle, an improved bilinear velocity model for the Riera formula was proposed, with a detailed numerical implementation algorithm.The numerical examples show that the new proposed method can provide a more reasonable technique procedure for the loading assessment of the anti-impact ability of nuclear power plants against commercial large aircraft impact.

导出引用

李建波1,2，杨凯1,2，梅润雨1,2. 基于能量守恒的商用大飞机Riera撞击曲线速度模型研究与改进[J]. 振动与冲击, 2020, 39(22): 143-149

LI Jianbo1,2,YANG Kai1,2,MEI Runyu1,2. Improved velocity model in the Riera impact loading formula for commercial large aircrafts on the basis of energy conservation principle[J]. Journal of Vibration and Shock, 2020, 39(22): 143-149

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