{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:MWF2AX3OXW23LJ4ZOFEH35HQRT","short_pith_number":"pith:MWF2AX3O","canonical_record":{"source":{"id":"2506.05649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-06-06T00:38:43Z","cross_cats_sorted":[],"title_canon_sha256":"a1e52097af09cf0c20509b19d79066e1a4d7411cd379e448af5a26b97b1af860","abstract_canon_sha256":"23149fdacdb75a0101e24ded8ac69a8e34343dcd753d3d37beb17134afe29101"},"schema_version":"1.0"},"canonical_sha256":"658ba05f6ebdb5b5a79971487df4f08ceb75ad52bd303adab050769d548b9450","source":{"kind":"arxiv","id":"2506.05649","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05649","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05649v1","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05649","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_12","alias_value":"MWF2AX3OXW23","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_16","alias_value":"MWF2AX3OXW23LJ4Z","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_8","alias_value":"MWF2AX3O","created_at":"2026-07-05T11:17:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:MWF2AX3OXW23LJ4ZOFEH35HQRT","target":"record","payload":{"canonical_record":{"source":{"id":"2506.05649","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-06-06T00:38:43Z","cross_cats_sorted":[],"title_canon_sha256":"a1e52097af09cf0c20509b19d79066e1a4d7411cd379e448af5a26b97b1af860","abstract_canon_sha256":"23149fdacdb75a0101e24ded8ac69a8e34343dcd753d3d37beb17134afe29101"},"schema_version":"1.0"},"canonical_sha256":"658ba05f6ebdb5b5a79971487df4f08ceb75ad52bd303adab050769d548b9450","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:17:07.535006Z","signature_b64":"4h4lqY9CVknxc8hmVZSUhDUJjQ878lPkCYJuM5yPGrPNAXrtAkalhKnaK+n81hAxsMDr2I4j4ry7GWLknP5HCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"658ba05f6ebdb5b5a79971487df4f08ceb75ad52bd303adab050769d548b9450","last_reissued_at":"2026-07-05T11:17:07.534503Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:17:07.534503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.05649","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:17:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"291b1zz0iIV+CHecnC7gVbZDZN3tVkJtu9XvpnZJJ+B6Lqrwc0fc8Mfv20z2GAYWsd1Sw6yqslVmhz/aDgV0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T23:29:00.563595Z"},"content_sha256":"6e35cd9c43752022f1648bea8bcd4ab5537bf7b1858e91698afa648bc827a119","schema_version":"1.0","event_id":"sha256:6e35cd9c43752022f1648bea8bcd4ab5537bf7b1858e91698afa648bc827a119"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:MWF2AX3OXW23LJ4ZOFEH35HQRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Flow-induced vibration of twin-pipe model with varying mass and damping: A study using virtual physical framework","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Jiawei Shen, Shixiao Fu, Svein S{\\ae}vik, Torgeir Moan, Xuepeng Fu","submitted_at":"2025-06-06T00:38:43Z","abstract_excerpt":"Flow-induced vibration (FIV) commonly occurs in rigidly coupled twin-pipe structures. However, the limited understanding of their FIV responses and hydrodynamic features presents a major challenge to the development of reliable engineering designs. To bridge this gap, the present study systematically investigates the FIV characteristics of a rigidly coupled twin-pipe model with elastic support using a virtual physical framework (VPF), which enables flexible control of structural parameters during physical testing. A distinctive feature of twin-pipe structures is the presence of in-line hydrody"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05649","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.05649/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:17:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Ki/2abuCqL7/4sy+5vQvm9qlAc6iNYLgoKsnns6clIqayStRjg7MhkhP4Bk94wbhOYJaiwBKXjqvx1EwRH+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T23:29:00.564463Z"},"content_sha256":"749fb303aab25d086e9717874718e04b65859a52a3ede4f2f8b66fd4d5016496","schema_version":"1.0","event_id":"sha256:749fb303aab25d086e9717874718e04b65859a52a3ede4f2f8b66fd4d5016496"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/bundle.json","state_url":"https://pith.science/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-07T23:29:00Z","links":{"resolver":"https://pith.science/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT","bundle":"https://pith.science/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/bundle.json","state":"https://pith.science/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MWF2AX3OXW23LJ4ZOFEH35HQRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:MWF2AX3OXW23LJ4ZOFEH35HQRT","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"23149fdacdb75a0101e24ded8ac69a8e34343dcd753d3d37beb17134afe29101","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-06-06T00:38:43Z","title_canon_sha256":"a1e52097af09cf0c20509b19d79066e1a4d7411cd379e448af5a26b97b1af860"},"schema_version":"1.0","source":{"id":"2506.05649","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05649","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05649v1","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05649","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_12","alias_value":"MWF2AX3OXW23","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_16","alias_value":"MWF2AX3OXW23LJ4Z","created_at":"2026-07-05T11:17:07Z"},{"alias_kind":"pith_short_8","alias_value":"MWF2AX3O","created_at":"2026-07-05T11:17:07Z"}],"graph_snapshots":[{"event_id":"sha256:749fb303aab25d086e9717874718e04b65859a52a3ede4f2f8b66fd4d5016496","target":"graph","created_at":"2026-07-05T11:17:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.05649/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Flow-induced vibration (FIV) commonly occurs in rigidly coupled twin-pipe structures. However, the limited understanding of their FIV responses and hydrodynamic features presents a major challenge to the development of reliable engineering designs. To bridge this gap, the present study systematically investigates the FIV characteristics of a rigidly coupled twin-pipe model with elastic support using a virtual physical framework (VPF), which enables flexible control of structural parameters during physical testing. A distinctive feature of twin-pipe structures is the presence of in-line hydrody","authors_text":"Jiawei Shen, Shixiao Fu, Svein S{\\ae}vik, Torgeir Moan, Xuepeng Fu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-06-06T00:38:43Z","title":"Flow-induced vibration of twin-pipe model with varying mass and damping: A study using virtual physical framework"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05649","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6e35cd9c43752022f1648bea8bcd4ab5537bf7b1858e91698afa648bc827a119","target":"record","created_at":"2026-07-05T11:17:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"23149fdacdb75a0101e24ded8ac69a8e34343dcd753d3d37beb17134afe29101","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-06-06T00:38:43Z","title_canon_sha256":"a1e52097af09cf0c20509b19d79066e1a4d7411cd379e448af5a26b97b1af860"},"schema_version":"1.0","source":{"id":"2506.05649","kind":"arxiv","version":1}},"canonical_sha256":"658ba05f6ebdb5b5a79971487df4f08ceb75ad52bd303adab050769d548b9450","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"658ba05f6ebdb5b5a79971487df4f08ceb75ad52bd303adab050769d548b9450","first_computed_at":"2026-07-05T11:17:07.534503Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:17:07.534503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4h4lqY9CVknxc8hmVZSUhDUJjQ878lPkCYJuM5yPGrPNAXrtAkalhKnaK+n81hAxsMDr2I4j4ry7GWLknP5HCg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:17:07.535006Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.05649","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6e35cd9c43752022f1648bea8bcd4ab5537bf7b1858e91698afa648bc827a119","sha256:749fb303aab25d086e9717874718e04b65859a52a3ede4f2f8b66fd4d5016496"],"state_sha256":"6d02837bb93b38849e488e7c5a9b190e31e33ba743ecc19d00aae7f37f8c08ac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Azfxb24mH7vWHBy0uo9ul3+vYGUpgjAw0GPfMCFLy/9i9NNnIQVs/aJXTjJNdvaeH+TVU6SNYWO1czet2SeoBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T23:29:00.574814Z","bundle_sha256":"5527a1887ce3fe73f0fb64f654e9cee20a193a704debd4b78850888e03b0d0e3"}}