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摘要: 结合显式动力分析有限元软件PAM-CRASH及其提供的SPH算法,建立了鸟撞飞机风挡数值分析模型。对某飞机风挡进行了动响应分析,计算了风挡中轴线上四点位移时间曲线;鸟撞击过程的仿真结果表明,SPH鸟体模型能有效模拟撞击时鸟体溅射成碎片的情形;建立了鸟撞击作用下风挡破坏判据,对风挡在试验条件下是否破坏进行了模拟计算。计算结果和试验结果吻合较好,表明本文建立的鸟撞飞机风挡数值模型是有效的。Abstract: A numerical analysis model for the bird-impact response of aircraft windshields was proposed by combining the dynamic explicit finite element code PAM-CRASH and the smoothed particle hydrodynamics (SPH) method. The dynamic response of an aircraft windshield to bird-impact loading was simulated by the proposed analysis model. The displacement-time curves for the four points on the medial axis of the aircraft windshield were calculated, the failure criterion for the aircraft windshield subjected to bird-impact loading was developed, and the failure state of the aircraft windshield under the given experimental conditions was numerically calculated. Numerical simulation results of the bird-impact process indicate that the SPH bird model can correctly model the breaking-up of the bird into debris particles. The good agreement between numerical and experimental results illuminates that the numerical simulation model developed in the present paper is valid.
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Key words:
- solid mechanics /
- bird-impact /
- PAM-CRASH /
- windshield /
- SPH
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