This paper reports the results from field tests on a 1/15th scaled fish anchor. The tests were conducted at three locations in the Swan River, Perth, Australia. Two series of tests were performed from the Burswood and Maylands jetties with water depths between 1·1 and 1·9 m. The final series of tests were undertaken in deeper (2·6 m) waters from a barge. The riverbed at the Burswood jetty and barge test location consisted of clay, and that at the Maylands jetty comprised sandy silt. The tip embedment depths of the scaled fish anchor, with dry weight of 0·304 kN and impact velocity of 5·89–9·55 m/s, in soft clay were 1·17–2·40 times the anchor length. For similar impact velocities, the embedment depths in sandy silt were 30–60% shallower. By comparing the field test data in clay, the fish anchor achieved normalised embedment depths similar to those of the torpedo and OMNI-Max anchors under half or less impact velocity. Importantly, the field tests confirmed the diving behaviour of the fish anchor under loading with mudline inclination of 20° and 25°, with the second peak dictated by the capacity. The ultimate capacity was 5–7 times that of the anchor submerged weight in water.

中文翻译：

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鱼锚潜水行为：通过天鹅河现场测试确认

本文报告了 1/15 比例鱼锚的现场测试结果。测试在澳大利亚珀斯天鹅河的三个地点进行。在 Burswood 和 Maylands 码头进行了两个系列的测试，水深在 1·1 和 1·9 m 之间。最后一系列测试是在驳船上的较深（2·6 m）水域进行的。Burswood 码头和驳船测试地点的河床由粘土组成，而 Maylands 码头的河床由沙质淤泥组成。干重为0·304 kN、冲击速度为5·89～9·55 m/s的带鳞鱼锚在软粘土中的尖端嵌入深度为锚长度的1·17～2·40倍。对于类似的冲击速度，砂质粉砂中的嵌入深度要浅 30-60%。通过比较粘土中的现场试验数据，在一半或更少的冲击速度下，鱼锚实现了与鱼雷和 OMNI-Max 锚相似的归一化嵌入深度。重要的是，现场测试证实了鱼锚在泥线倾角为 20° 和 25° 的负载下的潜水行为，第二个峰值由容量决定。极限承载力是锚在水中淹没重量的 5-7 倍。