基于鞭打试验的安全座椅神经网络优化设计

在新版C-NCAP管理规则中,增加了颈部保护测试(鞭打测试)。汽车座椅的安全设计对乘员的安全至关重要,因此后碰撞已成为汽车被动安全的重要组成部分。本文提出了一种神经网络与遗传算法相结合的安全座椅整体优化设计方法,以防止颈部扭伤。该方法优化后的座椅在头部加速度、颈部剪切力、颈部损伤指标等方面均有改善,避免了传统安全座椅优化方法求解离散点的缺陷。与正交试验优化结果相比,NIC降低了9.0%,Nkm降低了12.5%。In the new version of C-NCAP management rules, the neck protection test (whipping test) has been added. The safety design of car seat is very important to the safety of passengers, so rear collision has become an important part of passive safety of cars. In this paper, an overall optimization design method of safety seat based on neural network and genetic algorithm is proposed to prevent neck sprain. The seat optimized by this method has been improved in the aspects of head acceleration, neck shear force and neck injury index, which avoids the defect of traditional safety seat optimization method in solving discrete points. Compared with the optimization results of orthogonal test, NIC is reduced by 9.0% and Nkm is reduced by 12.5%.

基于QFD、TRIZ和FMEA的送夹料装置创新设计

随着市场竞争的加剧,产品创新设计逐渐被视为企业生存和发展的重要渠道。本文对产品的创新设计方法和模型进行了研究。针对现有产品创新设计方法和模型中的潜在问题,综合质量功能展开(QFD)、发明问题解决理论(TRIZ)和故障模式影响分析(FMEA)各自的特点,建立了一种基于QFD、TRIZ和FMEA的产品创新设计模型。通过在金属圆锯机的送夹料装置创新设计上的具体应用,验证了本文提出的模型完善了当前的产品创新设计过程,提高了用户满意度,降低了设计成本,同时保证了设计的可靠性,为广泛的设计人员提供了更有效的创新设计的思路,也为计算机辅助创新设计软件的开发的提供了理论基础。With the intensification of market competition, product innovation design is gradually regarded as an important channel for enterprise survival and development. This paper studies the innovative design methods and models of products. According to the potential problems in the existing product innovation design methods and model, a product innovation design model based on QFD, TRIZ and FMEA is established based on the characteristics of quality function development (QFD), theory of inventive problem solving (TRIZ) and failure mode and impact analysis (FMEA). Through the specific application of the innovative design of the feeding device of the metal circular saw, the model perfected the current product innovation design process, improved the user satisfaction, reduced the design cost, and ensured the reliability of the design, for a wide range of designers providing more effective innovative design ideas, also providing the theoretical basis for the development of computer-aided innovation design software.

非光滑结构对水下航行器压差阻力的影响

覆盖非光滑表面是降低水下航行器阻力最直接、最有效的办法,本文对水下航行器的压差阻力进行了研究,将吸附性非光滑结构和导流性非光滑结构分别安装在航行器的流固分离处,采用流体动力学仿真的方法研究两类非光滑结构对流体尾部流场的影响,研究表明,在航行器流固分离位置覆盖吸附性非光滑结构能够延迟流固分离,有效降低航行器压差阻力。