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首页> 外文期刊>Journal of Spacecraft and Rockets >Weight Growth Study of Reusable Launch Vehicle Systems
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Weight Growth Study of Reusable Launch Vehicle Systems

机译：可重复使用运载火箭系统的重量增长研究

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Using a wide spectrum of completed air-breathing and rocket-powered launch vehicle baseline configurations, an assessment was undertaken to ascertain each vehicle system's scaling response to empty weight growth. To establish the growth behavior, each vehicle's baseline solution was modified for percentage increases or decreases in the baseline empty weight from +10% to-10%, after which each vehicle system was then re-solved. The identification of the trends in these solutions enabled the determination of the growth factor for each vehicle configuration. The growth factor characterizes the system's sensitivity to changes in structural weight arising from technological uncertainty. Systems with high growth factors represent a greater amount of design risk because they may rapidly scale out of control if expected technology levels fail to materialize. This understanding may also be applied to measure the extent of improvements possible from application of more advanced technology. Several other figures of merit were also used to evaluate the growth solutions, including empty weight, wetted area, and gross weight. The assessment concluded that single-stage air breathers have a higher response to weight uncertainty than two-stage configurations with the horizontal takeoff mode being more sensitive than vertical takeoff. Two-stage air-breathing configurations, whereas exhibiting lower growth factors, differed greatly from each other in total empty weight across the growth cases with the vertical takeoff mode roughly half the weight of comparable horizontal takeoff configurations. Two-stage reusable rocket configurations also show low scaling weight growth factors and empty weights and are relatively insensitive to small percentage growth changes.
机译：使用广泛的完整的空气呼吸和火箭动力运载火箭基线配置，进行了评估，以确定每种运载工具系统对空重增长的缩放响应。为了确定生长行为，修改了每辆车的基准解决方案，以使基线空重的百分比增加或减少从+ 10％到-10％，然后再解决每辆车系统。这些解决方案趋势的识别可以确定每种车辆配置的增长因子。增长因子表征系统对技术不确定性引起的结构重量变化的敏感性。具有高增长因子的系统代表了更大的设计风险，因为如果无法实现预期的技术水平，它们可能会迅速失去控制。这种理解也可以用来衡量应用更先进技术可能带来的改进程度。其他几个指标也用于评估生长解决方案，包括空重，湿面积和毛重。评估得出的结论是，单级空气呼吸器对重量不确定性的响应要高于两级结构，其中水平起飞模式比垂直起飞更为敏感。两阶段空气呼吸配置，尽管表现出较低的生长因子，但在整个生长案例中，其总空重却相差很大，垂直起飞模式的重量约为水平起飞配置重量的一半。两阶段可重复使用的火箭构型还显示出低比例的重量增长因子和空的重量，并且对较小的百分比增长变化相对不敏感。

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